350-601 Implementing Cisco Data Center Core Technologies (350-601 DCCOR) Questions and Answers

 The command that completes the EEM script configuration for saving a copy of the running configuration to bootflash on a Cisco Nexus 9000 Series Switch is running-config. This command is used in the EEM applet to specify the source of the configuration file that needs to be copied. The complete command in the EEM applet would be action 1.0 cli command "copy running-config bootflash:/current-config.txt". This command will save the running configuration to a file named current-config.txt in the bootflash when the specified event occurs, which is when a user saves the configuration.

References: For more information on EEM scripts and the copy command on Cisco Nexus 9000 Series Switches, you can refer to the Cisco Data Center Core Technologies documentation and the Cisco NX-OS System Management Configuration Guide

 NFS uses XDR (External Data Representation) as the communication method for requests between servers and clients. XDR is a standard format for encoding and decoding data that is exchanged between different systems. XDR allows NFS to handle data with different byte orders, word sizes, and data types. XDR is also used by ONC RPC, which is the underlying protocol for NFS. XDR ensures that the data is represented consistently and correctly across different platforms and architectures. References :=

• Implementing and Operating Cisco Data Center Core Technologies (DCCOR) v1.2, Module 7: Data Center Storage Connectivity, Lesson 7.2: Network File System
• Network File System (NFS) - GeeksforGeeks, which explains the basics of NFS and its architecture.
• RFC 4506 - XDR: External Data Representation Standard, which defines the XDR standard and its specifications.

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The default host firmware policy is a system-defined policy that contains the firmware entries of all the components that are supported by the Cisco UCS Manager version. When a Cisco UCS Manager upgrade occurs, the default host firmware policy is updated to contain the firmware entries of all the components that are supported by the new Cisco UCS Manager version. The default host firmware policy is not replaced, assigned, or matched by any other policy after a Cisco UCS Manager upgrade. References := Implementing and Operating Cisco Data Center Core Technologies (DCCOR) - Cisco, Chapter 5: Implementing Cisco Unified Computing System Rack Servers, Section: Manage Firmware Versions in Cisco UCS Manager

The system will automatically revert to the backup image version if the endpoint fails to boot from the new firmware image. This is a feature of the Fabric Interconnects that ensures high availability and reliability. The GOLD firmware image is used for diagnostics and troubleshooting, not for normal operation. The kickstart image is used for booting the Nexus switches, not the Fabric Interconnects. References:

• Cisco UCS Manager Firmware Management Guide, Release 4.0 - Firmware Auto Install [Cisco UCS Manager], Firmware Auto Install, Firmware Auto Install Process
• Cisco UCS Manager Firmware Management Guide, Release 4.0 - Firmware Auto Install [Cisco UCS Manager], Firmware Auto Install, Firmware Auto Install Failure Scenarios
• Cisco Nexus 7000 Series NX-OS System Management Configuration Guide, Release 6.x - Upgrading the Cisco NX-OS Software [Cisco Nexus 7000 Series Switches], Upgrading the Cisco NX-OS Software, Upgrading the Cisco NX-OS Software Using the CLI

NFSv2

NFSv4

Kerberos

RADIUS

NFSv4 uses TCP for reliable transport and IP for network layer protocol. TCP ensures reliable delivery of packets, which is crucial for file systems, while IP is used for routing the data packets to their destination

 The correct code snippet to ensure that the Cisco NX-OS scheduler runs every day at 3:00 a.m. is “time daily 3:00”. This command configures the scheduler to execute the specified job daily at the given time, without the need for a ‘start’ keyword, which is not required in the syntax for daily repetitive tasks.

References: This explanation is based on the Cisco NX-OS documentation, which provides guidelines on how to schedule tasks using the NX-OS scheduler feature. The documentation is part of the Cisco Data Center Core Technologies study materials.

Upgrading the EPLD on a Cisco Nexus switch is a disruptive process that requires the switch to reboot multiple times. Each EPLD device on the switch must be upgraded individually, and the switch must reboot to initialize the new EPLD version for each device. This process ensures that all hardware components are properly updated and can operate with the new firmware, but it does cause temporary disruptions to network traffic as each module reboots.

References: For more detailed information, please refer to the Cisco Nexus 9000 Series FPGA/EPLD Upgrade Release Notes, where it discusses the impact of EPLD upgrades and the necessity of multiple reboots during the process1. Additionally, the Cisco Nexus 9000 Series NX-OS Software Upgrade and Downgrade Guide provides guidelines on the upgrade process, including the disruptive nature of EPLD upgrades

Private Cloud: owned, managed, and operated by a single organization.

Community Cloud: Owned, managed, and operated by one or more organizations or teams.

Public Cloud: Provisioned for open use.

Hybrid Cloud: At least two or more separate cloud infrastructures are connected together to facilitate hosted data and application portability.

 To discover a new chassis and establish all links from the chassis to the LAN network in a Cisco UCS domain with a vPC setup, the chassis discovery policy action should be set to one link. The Ethernet ports Eth1/1 and Eth1/2 should be configured as uplink Ethernet ports, and the link group preference should be set to Port Channel. This configuration ensures that the new chassis is properly discovered and that the links are correctly established to handle the LAN traffic.

References: The Implementing and Operating Cisco Data Center Core Technologies (DCCOR) course provides detailed instructions on chassis discovery and vPC configuration. For further guidance, Cisco’s official documentation on vPC best practices and configuration examples would be the appropriate references

 When storm control is applied to an interface with a zero percent value, it means that the switch will not tolerate any traffic that exceeds the bandwidth of the interfaces during a streaming window. The switch monitors the levels of incoming broadcast, multicast, and unicast traffic over a 1-second interval. When the configured threshold level is reached, further traffic in this category is dropped until the level falls below the threshold.

 The requirements specify the need for two-factor authentication and encrypted AAA packets using TCP port 49, which is the default port for TACACS+. TACACS+ provides additional security features suitable for two-factor authentication, unlike LDAP. Therefore, removing the LDAP provider and creating a TACACS+ provider in user management would fulfill these requirements.

References: Implementing and Operating Cisco Data Center Core Technologies (DCCOR) course materials and Cisco’s official documentation on authentication solutions.

The Peer Gateway feature on Cisco Nexus switches is designed to address the exact scenario described. When enabled, it allows the vPC peer switches to forward traffic based on the SVI MAC address, even if it is not the HSRP MAC address. This is particularly useful in cases where end devices do not use the HSRP virtual MAC address for the gateway and instead use the physical MAC address of one of the HSRP routers1. By using the Peer Gateway feature, both N9K_1 and N9K_2 will be able to forward traffic for VLAN 23, ensuring that the packets are not dropped due to the vPC loop prevention mechanism123.

References: = This information is supported by Cisco’s documentation on Nexus 5500 Platform Layer 3 and vPC Operations, which explains the use of the peer-gateway command to allow Layer 3 forwarding in scenarios where the destination MAC of the incoming packet is the MAC of its vPC peer switch1. Additionally, discussions in the Cisco Community confirm the necessity of this feature when certain devices on the network do not properly send traffic to the MAC address specified in the ARP234

Cisco Data Center Network Manager (DCNM) is designed to help manage all NX-OS network deployments, which includes LAN fabrics, SAN fabrics, and IP Fabric for Media (IPFM) networking in the data center. DCNM provides prebuilt templates that can be used to customize fabric deployments, allowing for a more streamlined and efficient setup process. These templates include best-practice policy templates for Easy Fabric Mode and support for Python scripting for more complex policy templates, facilitating the customization and automation of fabric deployments.

References: This information is supported by the Cisco Data Center Network Manager 11 Data Sheet, which outlines the features and benefits of DCNM, including the availability of prebuilt templates for fabric customization

To implement traffic monitoring for a server vNIC with fabric failover enabled, ensuring that traffic is sent to an analyzer even during a fabric interconnect failure, the correct configuration is to create two traffic monitoring sessions with different names, one per fabric, and connect an analyzer on each FI as the destination for the monitoring session local to the FI. This setup allows continuous monitoring because if one fabric interconnect fails, the other can still send traffic to its connected analyzer2.

References := Cisco Community Discussion on Understanding Fabric Failure and Failover in UCS

 In a Cisco HyperFlex Edge deployment, the witness VM, known as the “Invisible Cloud Witness,” resides within Cisco Intersight. This cloud-based platform eliminates the need for a dedicated witness VM by providing a virtual witness as a service, which simplifies the deployment and ongoing operations of HyperFlex Edge clusters1234.

References:

• Cisco HyperFlex Edge Deployment Guide, Release 5.0(x)1.
• Cisco HyperFlex Systems Installation Guide for VMware ESXi, Release 5.02.
• Cisco Blogs on HyperFlex and Intersight3.
• Cisco’s official page on HyperFlex for Edge Environments

 In Cisco UCS Manager, RBAC (Role-Based Access Control) is used to define what users can do within the system. The roles that can be used to configure LAN Connectivity policies are typically those with administrative privileges. The network-admin role has the necessary privileges to configure network-related settings, including LAN Connectivity policies. Similarly, the admin role has full administrative rights over all system configuration aspects, which also encompasses LAN Connectivity policies. The other roles listed do not have the appropriate level of access for this task.

References: The information is aligned with the Cisco Data Center Core Technologies source book, which details RBAC roles and their permissions within the Cisco UCS Manager environment

 For fabric redundancy in NPV mode on a Cisco MDS 9000 Series Switch, the engineer must connect the NPV devices to multiple upstream switches (A). This setup ensures that if one upstream switch fails, the NPV device can still reach the fabric through another upstream switch, maintaining fabric redundancy.

References := Switch Configuration - Configuring N Port Virtualization - Cisco2.

 The correct answer is option C. The fabric binding configuration in option C matches the output required for the Cisco MDS 9000 Series Switch. Fabric binding enhances the security of the SAN fabric by allowing only authorized switches to join the fabric. The configuration includes specifying the switch world wide name (swwn), domain ID, and member world wide node name (nwwn) to ensure that only the specified devices can participate in the fabric.

References: For more information on fabric binding and its configuration, you can refer to the Cisco MDS 9000 Series Fabric Switches Configuration Guide and the Implementing and Operating Cisco Data Center Core Technologies (DCCOR) study materials.

 The configuration in Cisco UCS Manager needs to specify the source of the traffic for the SPAN session. Since the requirement is to monitor the traffic from VSAN 11, selecting VSAN 11 as the source will direct the traffic to the monitoring session. This is consistent with the SPAN session’s purpose, which is to create a copy of the traffic for analysis or monitoring.

References := For more information on configuring SPAN sessions in Cisco UCS Manager, you can refer to the Cisco Data Center Core Technologies study materials and official documentation, which provide guidelines on setting up traffic monitoring solutions within a Cisco data center environment. These resources will offer detailed instructions and best practices for implementing SPAN sessions to monitor VSAN traffic.

PowerShell is a task automation and configuration management framework from Microsoft, consisting of a command-line shell and the associated scripting language. It is integrated with Cisco UCS Manager and provides cmdlets for automating the management of Cisco UCS domains, including Service Profiles. The UCS PowerTool is a set of PowerShell modules designed specifically for Cisco UCS, making it a suitable choice for a network engineer with scripting skills but limited programming knowledge. It supports configuration tasks for both B-Series Blade Servers and C-Series Rack Servers, aligning with the administrator’s future needs.

References: Cisco Community discussions on UCS PowerTool + Service Profiles1 and the Cisco UCS PowerTool Scripts Index

The correct configuration for capturing both ingress and egress traffic between a Cisco MDS 9000 Series Switch and a storage array, specifically for VSAN 10, is found in Option D. This configuration involves setting up a SPAN session on the switch. The SPAN session is configured to monitor the source interface connected to the storage array (fc2/1) and send the captured traffic to the destination interface connected to the traffic analyzer (fc4/2). The source filter vsan 10 command ensures that only traffic from VSAN 10 is included in the capture, which aligns with the requirements specified.

References: For more detailed information on configuring SPAN sessions on Cisco MDS 9000 Series Switches, please refer to the Cisco MDS SAN-OS documentation, which provides guidelines on traffic monitoring and analysis in a Cisco data center network environment. Additionally, the Cisco Data Center Core Technologies (DCCOR) study materials offer insights into best practices for implementing traffic analysis solutions in a data center context.

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NX-API Sandbox is a utility that allows the engineer to translate traditional Nexus CLI inputs and generate Python code using XML and JSON message formats. It is available on a Nexus 7700 series switch as a web-based tool that can be accessed from a browser. It provides a graphical interface for entering CLI commands and viewing the corresponding Python code and output. It also allows the engineer to execute the Python code directly on the switch or copy it to a script file. References := [Cisco Nexus 7000 Series NX-OS Programmability Guide]

To configure the Cisco IMC server management NIC for autonegotiation, you should select the shared LOM setting. This setting allows the Cisco IMC to share the LAN on motherboard (LOM) ports with the host operating system and negotiate the speed and duplex settings automatically. The shared LOM setting also provides redundancy and failover capabilities for the Cisco IMC management access. The other settings (Cisco card, dedicated, and shared LOM EXT) do not enable autonegotiation for the Cisco IMC server management NIC.

References: For more details on how to configure the Cisco IMC server management NIC, please refer to the following resources:

• Cisco Integrated Management Controller Configuration Guide
• Cisco Integrated Management Controller (IMC) Data Sheet

Creating a static route in VRF WEB for the subnet of Server 2 on N5K-1 (D) will direct traffic from Server 1 to the specific subnet where Server 2 resides. This ensures that traffic can flow from Server 1 to Server 2, even if it is unidirectional. The static route provides a specified path for the traffic to follow, which is necessary when the traffic must be unidirectional and the gateways are on different VLANs.

References: For further details on configuring static routes in a VRF on Cisco Nexus switches, please refer to the Cisco Data Center Core Technologies documentation, which provides guidelines on implementing routing protocols and static routes within VRF instances.\

To recover the configuration of the Cisco UCS Manager from a full backup available on a backup SCP server, the actions in Option A should be followed. These actions typically involve accessing the Cisco UCS Manager interface, navigating to the backup and restore settings, and initiating a restore operation using the SCP protocol to retrieve the backup file from the SCP server.

References: = For detailed steps and best practices, you can refer to the official Cisco documentation on “Backing Up and Restoring the Configuration” in the Cisco UCS Manager guide1.

Network

Aggressive

Bpdu

edge

Option A and D are the correct steps to implement the solution. Enabling encryption for LDAP ensures information integrity and confidentiality during data transmission between systems. Adding a trusted root LDAP certificate to Cisco Intersight establishes a secure connection by validating the authenticity of the LDAP server. References:

• Cisco Intersight User Guide, Release 1.0 - Configuring Cisco Intersight [Cisco Intersight], Configuring Cisco Intersight, Configuring LDAP Settings
• Cisco Intersight User Guide, Release 1.0 - Configuring Cisco Intersight [Cisco Intersight], Configuring Cisco Intersight, Configuring Certificates

The import function is available for all configuration, system configuration, and logical configuration files. You can perform an import while the system is up and running. An import operation modifies information on the management plane only. Some modifications caused by an import operation, such as a change to a vNIC assigned to a server, can cause a server reboot or other operations that disrupt traffic. https://www.cisco.com/en/US/docs/unified_computi ng/ucs/sw/gui/config/guide/141/UCSM_GUI_Configuration_Guide_141_chapter43.html#concept_D789E16C90724AEFB99D565574E45AD5

 To meet the requirements of automating the provisioning of Cisco Nexus 9000 Series Switches while hiding Admin and Config Menu items in Interface Manager, the roles of network-operator and access-admin should be assigned. The network-operator role permits device operations within Interface Manager, and the access-admin role is likely to have the necessary permissions to manage user access without exposing sensitive admin and configuration options.

References: = For more information on user roles and permissions in Cisco Data Center Network Manager (DCNM), you can refer to the official Cisco documentation and guides related to DCNM user role configuration.

In the context of Cisco Nexus switches, VRF (Virtual Routing and Forwarding) is used to create multiple virtual routing tables within a single switch. By using the default VRF for the scheduler job, the engineer ensures that the TFTP server, which is reachable in the global routing table, can be accessed without the need for additional VRF configuration. This simplifies the backup process and avoids potential issues with VRF-specific routing that could prevent access to the TFTP server.

References: For more detailed information, please refer to the official Cisco documentation for Nexus 3000 Series Switches or the Implementing and Operating Cisco Data Center Core Technologies (DCCOR) study materials.

Option D is the correct statement about monitoring Fibre Channel traffic on a Cisco UCS 6332 Fabric Interconnect. Fibre Channel traffic can be monitored even when it is encapsulated as FCoE (Fibre Channel over Ethernet) by using the SPAN (Switched Port Analyzer) feature. This allows network administrators to capture and analyze the Fibre Channel traffic flow and performance on any port or vHBA on the fabric interconnect. References:

• Cisco UCS Manager GUI Configuration Guide, Release 4.0 - Configuring Fibre Channel Traffic Monitoring [Cisco UCS Manager], Configuring Fibre Channel Traffic Monitoring, Configuring Fibre Channel Traffic Monitoring
• Cisco UCS Manager CLI Configuration Guide, Release 4.0 - Configuring Fibre Channel Traffic Monitoring [Cisco UCS Manager], Configuring Fibre Channel Traffic Monitoring, Configuring Fibre Channel Traffic Monitoring

The ‘Full State’ backup type in Cisco UCS Manager is designed to capture a snapshot of the entire system, which includes all configuration settings, system logs, and the operating system. This comprehensive backup can be used to fully restore the system in the event of a disaster recovery scenario. The ‘Full State’ backup is the only option that provides a complete system snapshot, making it the ideal choice for disaster recovery purposes.

References: The information regarding backup types and their purposes can be found in the Cisco Data Center Core Technologies source book, specifically in the section discussing system maintenance and backups within the Cisco UCS Manager platform.

To SPAN only the ingress traffic on a Cisco MDS 9000 series switch, the configuration must include specifying the source interface for monitoring (fc 1/23) and setting it to capture only ingress traffic (rx). Option A and Option C contain the necessary commands to achieve this.

References: = Detailed steps and examples for configuring SPAN to monitor ingress traffic on Cisco MDS 9000 series switches can be found in the Cisco MDS 9000 Series System Management Configuration Guide

 Option D is the correct configuration to enable the Cisco UCS Manager to manage a Cisco UCS C-Series server by using a single cable for management and data traffic. The commands enter the server scope, then the cimc scope, then the mgmt-conn scope with the sideband option, which enables the management connection through the sideband interface. Then, the mgmt-conn-state is set to enabled and the changes are committed to the buffer. References:

• Cisco UCS Manager CLI Configuration Guide, Release 4.0 - Configuring Cisco UCS C-Series Servers [Cisco UCS Manager], Configuring Cisco UCS C-Series Servers, Configuring the Management Connection
• Cisco UCS Manager CLI Configuration Guide, Release 4.0 - Configuring Cisco UCS C-Series Servers [Cisco UCS Manager], Configuring Cisco UCS C-Series Servers, Enabling the Management Connection Through the Sideband Interface

The hybrid cloud model is the most suitable for the described scenario. It allows for a combination of local (private) cloud infrastructure with remote (public) cloud services. This model supports hosting the primary workloads in a local data center, utilizing remote data centers for backups, and provides the flexibility to scale out to a public cloud provider when necessary. The hybrid cloud model offers the benefits of both private and public clouds, including security, scalability, and flexibility, which aligns with the organization’s requirements.

References: For more information on cloud deployment models and their use cases, you can refer to the Cisco Data Center Core Technologies (DCCOR) study materials or the official Cisco documentation on cloud solutions.

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The release of NFSv4 brought a revolution to authentication and security to NFS exports. NFSv4 mandates

the implementation of the RPCSEC_GSS kernel module, the Kerberos version 5 GSS-API mechanism,

SPKM-3, and LIPKEY. With NFSv4, the mandatory security mechanisms are oriented towards

authenticating individual users, and not client machines as used in NFSv2 and NFSv3.

https://web.mit.edu/rhel-doc/5/RHEL-5-manual/Deployment_Guide-en-US /s1-nfs-security.html

 A nondisruptive upgrade is possible only when there are no changes to the configuration settings or network connections during the upgrade process. Any such changes can lead to a disruption, which is particularly critical in a dual supervisor Cisco Nexus 7000 series switch where stability is paramount.

References := For an in-depth understanding, refer to the Cisco Data Center Core Technologies study materials, specifically the sections discussing software upgrades and maintenance for Cisco Nexus switches

 Option B and E are the correct configuration sets that must be used to meet the requirements. Option B enables the user role distribution in DC1 by setting the role distribution policy to enabled and the role distribution scope to global. Option E constrains the NTP and call home features to DC2 by setting the NTP and call home policies to local and assigning them to the DC2 fabric interconnects. References:

• Cisco UCS Manager CLI Configuration Guide, Release 4.0 - Configuring User Role Distribution [Cisco UCS Manager], Configuring User Role Distribution, Configuring User Role Distribution
• Cisco UCS Manager CLI Configuration Guide, Release 4.0 - Configuring NTP [Cisco UCS Manager], Configuring NTP, Configuring NTP
• Cisco UCS Manager CLI Configuration Guide, Release 4.0 - Configuring Call Home [Cisco UCS Manager], Configuring Call Home, Configuring Call Home

 To configure an application profile using REST API, the engineer needs to first authenticate with the APIC using the POST method to the aaaLogin URI. This will return a token that can be used for subsequent requests. The error message indicates that the token is missing or expired, so the engineer needs to perform the POST to aaaLogin method again before configuring the application profile. References := [Cisco APIC REST API Configuration Guide]

 In Cisco Unified Computing System (UCS), a service profile’s UUID (Universally Unique Identifier) can be allocated from a UUID pool. This pool is predefined within UCS Manager and allows for consistent identity assignment across different hardware, enabling stateless computing. The UUIDs are not based on the hardware, not vendor assigned, and although they are unique, they are not system generated in this context; they are drawn from a pool created specifically for service profiles to ensure uniqueness and manageability within the UCS environment.

References: The concept of UUID pools and their use in service profiles is detailed in the Cisco Data Center Core Technologies documentation, particularly in sections discussing service profile creation and management within the UCS Manager. For a deeper understanding, the Cisco UCS Manager GUI Configuration Guide provides step-by-step instructions on how to create and assign UUID pools for service profiles.

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https://www.cisco.com/c/en/us/td/docs/dcn/nx-os/nexus9000/102x/programmability/cisco-nexus-9000-series-nx-os-programmability-guide-release-102x/m-n9k-python-api-101x.html

The attribute that must be selected to implement microsegmentation of endpoints within the same IP subnet using a network-based attribute that allows IP subnet independence is the Tag attribute. The Tag attribute is a user-defined attribute that can be assigned to endpoints based on any criteria, such as location, function, or security level. The Tag attribute can be used to create microsegmentation policies in ACI, which define the rules for communication between endpoints within the same or different bridge domains. The Tag attribute enables IP subnet independence, which means that the microsegmentation policies are not tied to the IP subnet of the endpoints, and can be applied across different subnets or even different fabrics. The Tag attribute also simplifies the management and scalability of microsegmentation policies, as it does not require the use of IP addresses or MAC addresses to identify endpoints. References :=

• Implementing and Operating Cisco Data Center Core Technologies (DCCOR) v1.2, Module 6: Data Center Network Connectivity Design, Lesson 6.2: Cisco ACI Overview and Concepts
• Cisco Application Centric Infrastructure Fundamentals, Chapter: Endpoint Groups and Microsegmentation, Section: Microsegmentation Using Tags

Cisco HyperFlex All-Flash Stretched clusters provide a higher number of Input/Output Operations Per Second (IOPS) compared to All-HDD Stretched clusters. This is due to the faster data access speeds of flash storage, which results in better performance and lower latency for applications, especially those requiring high throughput and fast processing2

 When a VLAN is added to a trunk and it does not appear on the vNIC of an associated server, it typically indicates that the vNIC template is not updating as it should to reflect changes. By changing the template type of Trunk-A to an updating template, any changes made to the trunk configuration, such as adding a new VLAN, will be dynamically applied to all vNICs associated with that template. This action will allow the newly added VLAN to be included in the vNIC configuration without the need to manually update each vNIC or recreate the templates.

References := This recommendation aligns with best practices for managing vNIC templates in Cisco UCS environments, where updating templates are used to ensure changes propagate automatically to all associated instances

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2,4,5 – NAS 1,3 - SAN

The virtual-service resize command (D) is used to modify the resource allocation for a Linux container on a Cisco Nexus Series Switch1. This command allows the administrator to specify the amount of CPU and memory allocated to the container, ensuring it has the necessary resources to run successfully. In this case, the command would be used to allocate 10 percent of the CPU and 1024 MB of RAM to the container1.

References: The usage of the virtual-service resize command for managing resources in a Linux container can be found in the Cisco Nexus 9000 Series NX-OS Programmability Guide1.

The last packet indicates a DHCP Release message, which is sent by the client to the DHCP server to release the assigned IP address. This is typically done when the client no longer requires the IP address, or before the client shuts down to ensure the IP address can be reassigned. The packet capture showing a DHCP Release message confirms that the client is informing the DHCP server that it is releasing its current IP address.

References := For further understanding of DHCP operations and troubleshooting connectivity issues, the Cisco Data Center Core Technologies source book provides detailed explanations. Additionally, Cisco’s official documentation and resources on their website offer extensive guidance on managing and troubleshooting DHCP in Cisco environments. These materials are essential for network engineers working with Cisco Nexus series switches and dealing with DHCP-related issues.

The method that a network engineer must use to upgrade the BIOS firmware of a Cisco UCS standalone C-Series rack-mount server is to use the Cisco host upgrade utility. The Cisco host upgrade utility is a tool that allows the network engineer to upgrade the firmware of various components of the server, such as the BIOS, the CIMC, the RAID controller, and the network adapter. The Cisco host upgrade utility can be downloaded from the Cisco website and run from a bootable USB drive or CD-ROM. The Cisco host upgrade utility provides a graphical user interface that guides the network engineer through the firmware upgrade process, and allows the network engineer to select the firmware versions and the components to be upgraded. References :=

• Implementing and Operating Cisco Data Center Core Technologies (DCCOR) v1.2, Module 5: Cisco Unified Computing System, Lesson 5.4: Cisco UCS C-Series Servers
• Cisco Host Upgrade Utility User Guide, Chapter: Overview of the Cisco Host Upgrade Utility

 To directly connect a Fibre Channel storage array to a Cisco UCS domain, configuring a new VSAN is essential as it creates a separate fabric to isolate the storage traffic. Additionally, creating a Storage Connection Policy is necessary to define how the UCS domain will communicate with the storage array, including zoning and VSAN membership.

During an In-Service Software Upgrade (ISSU) on Cisco Nexus 9000 Series Switches, the LACP peer session is designed to remain up without any renegotiation or reset. This is because ISSU is a process that allows for software upgrades without disrupting the normal operation of the network. The default LACP timers and the ISSU process are designed to work together to maintain the session state even during the upgrade process. The Nexus upgrade process will force the chassis itself to upgrade disruptively if LACP fast is used, which is not the default setting. A disruptive upgrade means the chassis itself will fully reload, impacting all ports on the switch, not just the LACP fast ones. However, with the default aging timers, the LACP peer connection should not be affected1.

References:

• Cisco Nexus 9000 Series NX-OS Software Upgrade and Downgrade Guide2.
• Cisco Community discussions on LACP and ISSU impact

 To implement private VLANs for Cisco UCS 8-Series servers, the primary VLAN is already present, and the secondary VLAN needs to be added to both fabrics. The correct configuration set that accomplishes this task is Option C. This option includes the necessary commands to create the VLAN and set its sharing to secondary, which is required for the configuration of private VLANs in a Cisco UCS environment12.

References: = For detailed steps and configurations, refer to the Cisco documentation on private VLANs and UCS configuration12. It provides comprehensive guidance on setting up private VLANs in the Cisco UCS environment.

When configuring a vHBA template in Cisco UCS Manager, the engineer needs to specify the logical addresses used by the vHBA and the path through which the SAN traffic flows. The two resources that must be specified in the vHBA template are the WWN (World Wide Name) and the Fabric ID. The WWN is a unique identifier for the vHBA that is used for zoning and LUN masking in the SAN environment. The WWN can be assigned manually or automatically from a WWN pool. The Fabric ID is a parameter that determines which fabric interconnect (A or B) the vHBA is associated with. The Fabric ID can be set to a specific value or to ‘default’, which allows the system to choose the best available fabric interconnect based on the availability and load balancing policies. References :=

• Implementing and Operating Cisco Data Center Core Technologies (DCCOR) v1.2, Module 5: Cisco Unified Computing System, Lesson 5.2: Cisco UCS B-Series Connectivity
• Cisco UCS Manager GUI Configuration Guide, Release 4.0, Chapter: Configuring SAN Connectivity, Section: Creating vHBA Templates

 To provision a new uplink and increase the available bandwidth for the NPV enabled switch, the commands in Option A should be used. These commands will configure the additional uplink to the NPIV switch, thus addressing the bandwidth contention issues experienced by the servers.

After creating a keyring and generating a certificate request, the next step is to create a trusted point. This involves downloading the certificate chain from the CA authority, converting it to the required format, and creating a Trust-Point on UCS Manager where the certificate details are pasted

The command ‘aaa authentication login default fallback error local’ is used to ensure that if RADIUS servers are unreachable, the system will fall back to using the local user database for SSH access to the Cisco MDS 9000 Series Switch.

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/6_2/con figuration/guides/security/nx-os/sec_cli_6-x/cradtac1.html

To SPAN traffic in both directions from a vNIC on a VM deployed on a Cisco UCS blade server to a packet analyzer connected to UCS-A slot 2 port 12, commands A and D are required. Command A sets the direction of traffic monitoring to both receive and transmit directions, while command D activates the Ethernet traffic monitoring session. The other commands are not needed or incorrect for this configuration. Command B uses the wrong syntax for creating the destination interface, command C uses the wrong keyword for setting the direction, and command E uses the wrong syntax for creating the Ethernet traffic monitoring session. References:

• Cisco UCS Manager GUI Configuration Guide, Release 4.0 - Configuring Ethernet Traffic Monitoring [Cisco UCS Manager], Configuring Ethernet Traffic Monitoring, Configuring Ethernet Traffic Monitoring
• Cisco UCS Manager CLI Configuration Guide, Release 4.0 - Configuring Ethernet Traffic Monitoring [Cisco UCS Manager], Configuring Ethernet Traffic Monitoring, Configuring Ethernet Traffic Monitoring

In Cisco UCS, modifying user accounts involves several considerations. Disabling a user account does indeed maintain all the data in the Cisco UCS Fabric Interconnect, which means that the user’s settings and privileges are retained even though the account is inactive (A). Local user accounts have precedence over remote authentication server accounts. This means that if a user account exists both locally and on a remote server like TACACS, RADIUS, or LDAP, the local account settings will take priority (D).

References := Managing User Accounts - Cisco1.

 This type of backup includes information about VLANs, VSANs, and other policies and is in XML format, which is human-readable. Although the question specifies the use of UDP, none of the options provided use UDP as they are all TCP-based protocols; however, TFTP is often confused with being UDP-based because it is a lightweight protoco

FCoE (Fibre Channel over Ethernet) is a technology that allows Fibre Channel traffic to be encapsulated and transported over Ethernet networks. FCoE requires the use of FCFs (Fibre Channel Forwarders), which are devices that act as bridges between the FCoE and Fibre Channel domains. FCFs can be configured with a priority value that determines their preference for connecting to CNAs (Converged Network Adapters), which are devices that support both Ethernet and Fibre Channel protocols. The priority value ranges from 0 to 1024, with 0 being the lowest and 1024 being the highest. To configure an MDS switch as the best switch to connect by the CNAs in the fabric, the fcoe fcf-priority 1024 command should be applied. This gives the switch the highest priority and makes it the most preferred FCF for the CNAs.

References := Configuring FCoE

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/fcoe/521n11/b_5k_FCoE_Config_521N11/ b_5k_FCoE_Config_521N11_chapter_011.pdf

Placing all EPGs in the preferred group within a VRF allows for communication between them without the need for additional contracts. This is because the preferred group feature in Cisco ACI allows EPGs within the same VRF to communicate with each other by default, bypassing the need to provide and consume contracts1. This simplifies the configuration process when new EPGs and bridge domains are added, as they inherit this communication capability by being part of the preferred group1.

References := For more information on the implementation of VRFs and the use of the preferred group feature in Cisco ACI, you can refer to the Cisco documentation on “Use vzAny to Automatically Apply Communication Rules to all EPGs in a VRF” and other related resources1. These documents provide detailed guidance on how to configure VRFs and EPGs to achieve seamless communication within the network infrastructure.

Cisco DCNM with SAN Insight is the solution that provides detailed information on the status of storage targets, including capacity metrics. SAN Insight is a feature within Cisco DCNM that allows storage administrators to monitor and analyze storage network traffic, helping to identify and resolve issues such as unexpected capacity limits. It would be the appropriate tool for creating and submitting a daily report of the environment showing the status of storage targets with the highest capacities.

The Bash script is designed to loop through the available namespaces and output all registered interfaces within the Cisco NX-OS Guest Shell. The correct code snippet to complete the script is option C, ifconfig "$ns". This command will display the network configuration for each namespace, allowing the engineer to view all registered interfaces.

References: The use of ifconfig in conjunction with namespace variables is a common practice in network scripting to retrieve interface information. For more detailed information on scripting in Cisco NX-OS, you can refer to the Cisco Nexus 9000 Series NX-OS Programmability Guide.

Text Description automatically generated

The PowerShell command in option D is the correct choice for automating the removal of switches from VLANs using the Cisco UCS Manager PowerShell module. This command uses environment variables to specify the VLAN name and switch identifiers, ensuring that the VLAN persists even when it is no longer associated with the switch port. The command structure allows for the removal of the VLAN association from the switch port without deleting the VLAN itself, thus maintaining the VLAN configuration for potential future use.

References: The explanation is based on the Cisco UCS Manager PowerShell module documentation, which provides details on scripting and automation capabilities for managing Cisco UCS environments.

The configuration set in Option C is designed to invoke a Python script when the router becomes unreachable. It uses an event scheduler to track the state of the router and, if it is not up, it triggers the Python script “routerdown.py” at specified intervals. This setup ensures that the operations team is alerted promptly when the router DC-RTR-1 becomes unreachable, allowing for quick response and troubleshooting.

 Option C is the correct configuration to apply a power redundancy policy on a Cisco UCS C-Series Rack Server that supports two power sources. The power redundancy policy determines how the server uses the available power supplies to optimize power usage. The grid option means that the server uses power from both power supplies simultaneously. If one power supply fails, the server continues to operate with the remaining power supply. The other options are not suitable for this requirement. The n+1 option means that the server uses one fewer power supply than the number of power supplies that are installed. If a power supply fails, the server uses the extra power supply. The non-redundant option means that the server uses only one power supply, regardless of the number of power supplies that are installed. If the power supply fails, the server shuts down. The ps-redundant option means that the server uses power from the most efficient power supply. If the power supply fails, the server switches to another power supply. References:

• Cisco UCS C-Series Servers Integrated Management Controller GUI Configuration Guide, Release 4.0 - Configuring Server Power [Cisco Integrated Management Controller], Configuring Server Power, Configuring the Power Policy
• Cisco UCS C-Series Servers Integrated Management Controller GUI Configuration Guide, Release 4.0 - Configuring Server Power [Cisco Integrated Management Controller], Configuring Server Power, Power Redundancy Modes

 Cisco UCS Director is the appropriate solution for orchestrating the configuration of storage arrays, firewalls, and Cisco ACI networking. It supports open automation through various APIs and offers a service catalog that allows users to manage and deploy services across multiple domains, including compute, storage, networking, and virtualization.

References: The Implementing and Operating Cisco Data Center Core Technologies (DCCOR) course provides insights into the capabilities of Cisco UCS Director, including its orchestration and automation features

Option D is the recommended method to configure the SAN boot when the storage system maps the source WWPN to a unique LUN. This method creates a SAN boot policy in which every initiator is mapped to a different target LUN, which ensures that each server boots from its own LUN and avoids any conflicts or errors. The other options are either incorrect or incomplete for the task. References:

• Cisco UCS Manager GUI Configuration Guide, Release 4.0 - Configuring SAN Boot [Cisco UCS Manager], Configuring SAN Boot, Configuring SAN Boot
• Cisco UCS Manager CLI Configuration Guide, Release 4.0 - Configuring SAN Boot [Cisco UCS Manager], Configuring SAN Boot, Configuring SAN Boot

To monitor and export traffic to a Network Analyzer, particularly ingress traffic from Host-A and all traffic for VLAN 20 from Host-B, the engineer must implement a configuration that captures the specified traffic and directs it to the Network Analyzer tool. The correct configuration will depend on the capabilities of the network devices in use and the specifics of the Network Analyzer’s requirements.

 The configuration must include setting up a SPAN (Switched Port Analyzer) or RSPAN (Remote SPAN) session that mirrors the desired traffic to a port connected to the Network Analyzer. This would involve specifying the source interfaces or VLANs and the destination port for the mirrored traffic. Additionally, the configuration should ensure that the Network Analyzer is capable of receiving and processing the mirrored traffic, which may require additional settings on the Network Analyzer itself.

 The correct data structure to use within a POST message to receive a login token when configuring the Cisco APIC via REST API calls is an XML payload that includes the  tags with nested  and  tags for the username and password. This structure is shown in Option A, which is the standard format for authentication requests to the Cisco APIC.

References := For more detailed information, please refer to the Cisco APIC REST API Configuration Guide, which provides comprehensive instructions on using REST API for system configuration, including authentication and token retrieval processes.

APM supports ERSPAN. This will be ERSPAN destination. We need source session from switch. https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/16-3/configuration_guide/b_163_consolidated_3850_cg/b_163_consolidated_3850_cg_chapter_01001010.pdf

 NFS, or Network File System, is a file service protocol that allows files to be accessed over a network in a manner similar to how local storage is accessed. NFS provides the capability for clients to view, store, and update files on a remote Linux-based storage repository. It is widely used as a distributed file system standard for Network Attached Storage (NAS) because it allows the files to appear locally mapped to the client, facilitating easy file sharing and management1.

References := The use of NFS in NAS environments is well-documented in Cisco Data Center Core Technologies source documents and study guides, which explain how NFS works and its role in providing distributed file system services

 The command set in Option C is the correct configuration for a Fibre Channel port channel on a Cisco Nexus 9000 Series Switch that meets the specified requirements. The commands in this option perform port-channel protocol negotiation with peer ports using the “channel mode active” command, explicitly configure the trunk mode with “switchport trunk mode on,” and allow VSANs from 10 to 20 with “switchport trunk allowed vsan 10-20.”

References: For further details, you would refer to the Cisco Nexus 9000 Series NX-OS SAN Switching Configuration Guide, which provides instructions on configuring Fibre Channel port channels and related settings.

The vsan bind interface command is used to statically assign VSAN membership to a virtual Fibre Channel interface. This command overrides the VSAN membership that is derived from the physical interface or the default VSAN. The other commands are either invalid or do not apply to virtual Fibre Channel interfaces. References:

• Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide, Release 9.3(x) - Configuring Virtual Fibre Channel Interfaces [Cisco Nexus 9000 Series Switches], Configuring Virtual Fibre Channel Interfaces, Configuring VSAN Membership for Virtual Fibre Channel Interfaces
• Cisco Nexus 9000 Series NX-OS SAN Switching Configuration Guide, Release 9.3(x) - Configuring VSANs [Cisco Nexus 9000 Series Switches], Configuring VSANs, Configuring Static VSAN Membership

Option D is the correct set of steps to perform a backup and restore of the Cisco Nexus 5000 Series Switch configuration using UDP as the only protocol. TFTP is a UDP-based protocol that can be used to transfer files between the switch and the backup server. The startup-config file contains the configuration that is applied when the switch boots up, while the running-config file contains the configuration that is currently active on the switch. To restore the configuration from the backup, the backup-config file needs to be copied from the backup server to the running-config file on the switch. References:

• Cisco Nexus 5000 Series NX-OS System Management Configuration Guide, Release 7.x - Configuring File Systems, Directories, and Images [Cisco Nexus 5000 Series Switches], Configuring File Systems, Directories, and Images, Copying a Configuration File to a Remote Server
• Cisco Nexus 5000 Series NX-OS System Management Configuration Guide, Release 7.x - Configuring File Systems, Directories, and Images [Cisco Nexus 5000 Series Switches], Configuring File Systems, Directories, and Images, Copying a Configuration File from a Remote Server
• Cisco Nexus 5000 Series NX-OS System Management Configuration Guide, Release 7.x - Configuring File Systems, Directories, and Images [Cisco Nexus 5000 Series Switches], Configuring File Systems, Directories, and Images, Copying the Running Configuration to the Startup Configuration
• Cisco Nexus 5000 Series NX-OS System Management Configuration Guide, Release 7.x - Configuring File Systems, Directories, and Images [Cisco Nexus 5000 Series Switches], Configuring File Systems, Directories, and Images, Copying the Startup Configuration to the Running Configuration

The location where the engineer can look for the latest core dump file after a Cisco MDS 9000 series storage switch has reloaded unexpectedly is /mnt/core. A core dump file is a file that contains the memory state of the kernel at the time of a system failure. The core dump file can help the engineer or the Cisco technical support to analyze the cause of the problem and to fix it. The core dump file is stored in the /mnt/core directory on the switch, and it can be accessed using the CLI command ‘show cores’ or ‘utils core active list’. The other directories (/mnt/pss, /mnt/logs, and /mnt/recovery) do not contain the core dump file, but they may contain other useful information for troubleshooting, such as process state information, log files, and recovery files.

References: For more information on how to troubleshoot core dumps on a Cisco MDS 9000 series storage switch, please refer to the following resources:

• Troubleshooting Core Dumps
• Cisco MDS 9000 Family Kernel Core Server Installation and Configuration Guide

The command logging logfile Local 4 size 20000 configures the Cisco MDS 9000 Series Switch to store log messages with a severity of “warning” (which corresponds to severity level 4) and above. The size parameter is set to 20000 bytes, which ensures that the log file does not exceed the specified maximum size1.

References:

• For detailed information on configuring system message logging on Cisco MDS 9000 Family switches, you can refer to the Cisco documentation on system message logging1.

To meet the requirements of securing HSRP communication and supporting more than 300 groups, the commands needed are hsrp version 2 which allows for a greater number of HSRP groups (0-4095) and authenticate md5 key-chain NHRP-KEYS which provides MD5 authentication to secure HSRP updates.

Cisco Data Center Network Manager (DCNM) is the monitoring solution that can fulfill the requirements of visualizing the SAN, supporting VXLAN overlays, and identifying storage slow drain issues for a Fibre Channel storage environment consisting of Cisco Nexus 9000 and MDS 9000 Series Switches3.

vsh -c "show ip arp", awk'{print "ping" $1}', vsh, egrep "statistics|loss"

 Completing the vPC domain implementation requires adding the vPC member ports to the vPC channel group. This action ensures that all member ports are correctly bundled into the vPC, allowing for consistent forwarding behavior and redundancy across the vPC peer switches2.

 A full state backup is the appropriate choice when an engineer needs to perform a backup and restore in Cisco UCS for disaster recovery purposes. This type of backup includes a snapshot of the entire system and is saved as a binary file. Importantly, full state backups are encrypted, ensuring that passwords and other sensitive information are not stored as clear text12. While TFTP (Trivial File Transfer Protocol) is not secure by itself, the encryption of the full state backup file provides the necessary security for the passwords within the backup.

References :=

• Cisco documentation on “Backing Up and Restoring the Configuration” provides detailed information on the different backup types and their contents1.
• Cisco UCS Manager Administration Management Guide 4.2, which mentions the encryption of full state backups

Table Description automatically generated with low confidence

 Option C is the correct attribute to use to assign the servers to different microsegments based on their VM names. By doing this, IT security can enforce policies that isolate production from development database servers existing in the same EPG and IP subnet. This can be achieved by using the microsegmentation feature of Cisco ACI, which allows granular control over the communication between endpoints within an EPG. References:

• Cisco APIC Layer 4 to Layer 7 Services Deployment Guide, Release 4.2(x) - Microsegmentation [Cisco Application Policy Infrastructure Controller (APIC)], Microsegmentation, Microsegmentation Overview
• Cisco APIC Layer 4 to Layer 7 Services Deployment Guide, Release 4.2(x) - Microsegmentation [Cisco Application Policy Infrastructure Controller (APIC)], Microsegmentation, Configuring Microsegmentation

To accomplish the goal of adding all devices already logged in and learned to the Fibre Channel active database, the customer should enable port security and device aliases on the Cisco MDS 9000 series switch. Port security is a feature that allows the switch to restrict the number and type of devices that can log in to a Fibre Channel port. Port security can be configured to automatically add the devices that are already logged in and learned to the active database, and prevent any unauthorized devices from logging in. Device aliases are user-friendly names that can be assigned to devices based on their World Wide Names (WWNs). Device aliases can be used to simplify the management and configuration of devices, as well as to enhance the security and visibility of the Fibre Channel network. Device aliases can also be automatically added to the active database along with the port security information, and can be used for zoning and other operations. References :=

• Implementing and Operating Cisco Data Center Core Technologies (DCCOR) v1.2, Module 7: Data Center Storage Connectivity, Lesson 7.3: Fibre Channel Protocol
• Cisco MDS 9000 Family NX-OS Security Configuration Guide, Chapter: Configuring Port Security
• Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide, Chapter: Configuring Device Aliases

The In-Service Software Upgrade (ISSU) process is designed to upgrade the system software with minimal disruption to the network. Nonstop forwarding (NSF) and stateful switchover (SSO) are two features that work together to maintain packet forwarding and switch state information during the ISSU process. NSF allows the router to continue forwarding packets even when the route processor is failing over, while SSO synchronizes state information between redundant route processors to ensure a seamless transition during a failover1.

References := For a deeper understanding of the ISSU process and its associated features, you can refer to Cisco’s official documentation on In-Service Software Upgrade (ISSU), which provides detailed information on how NSF and SSO contribute to a nondisruptive upgrade

Option A is the correct command set to configure an extra keyring in Cisco UCS Manager. The commands create a keyring named “extra” with a modulus of 4096 bits, which provides a high level of encryption. The commands also generate a self-signed certificate for the keyring, which enables secure authentication when users use the web interface. References:

• Cisco UCS Manager CLI Configuration Guide, Release 4.0 - Configuring Key Management [Cisco UCS Manager], Configuring Key Management, Configuring Key Rings
• Cisco UCS Manager CLI Configuration Guide, Release 4.0 - Configuring Key Management [Cisco UCS Manager], Configuring Key Management, Configuring Certificates

The following example modifies an overridden policy by changing the number of FCNS database entries to

1500. It also generates both the configured and the default syslog messages of the default system policy

event manager applet fcns_policy override __fcns_entries_max_per_switch

event fcns entries max-per-switch 1500 action 1.0 syslog priority warnings msg FCNS DB entries have reached the EEM limit.

 NFSv4 uses the TCP protocol and requires only one IP port (2049) to run the service. This simplifies firewall configuration and improves security by reducing the number of open ports

Cisco HyperFlex is a hyperconverged infrastructure solution that combines compute, storage, and networking in a software-defined platform. Cisco HyperFlex supports two hypervisors: VMware vSphere and RedHat KVM. VMware vSphere is a widely used virtualization platform that provides enterprise-class features and performance. RedHat KVM is an open source hypervisor that is integrated with the Linux kernel and offers scalability and flexibility. Cisco HyperFlex does not support Microsoft Hyper-V, OpenStack, or Citrix XenServer as hypervisors, although it can interoperate with them through other Cisco products or solutions. References: For more information on Cisco HyperFlex and its supported hypervisors, please refer to the following resources:

• Cisco HyperFlex Systems Solution Overview
• Cisco HyperFlex Systems Installation Guide for VMware ESXi
• Cisco HyperFlex Systems Installation Guide for Red Hat Enterprise Linux KVM

Graphical user interface, text, application Description automatically generated

1. set the format and destination to which the data is sent.

2. configure the data to be collected as part of the sensor group.

3. set the subscription between the sensor-group and the destination.

Switch 1:

Box 1 = hsrp version 2

Box 2 = priority 100

Box 3 = mac-address 6000.6000.6000

Switch 2:

Box 1 = hsrp version 2

Box 2 = priority 255

Box 3 = mac-address 6000.6000.6000

 In a vPC (Virtual Port-Channel) environment, multicast traffic is expected to be replicated to the ports that have joined the multicast group and also across the peer link. This ensures that in case of a failure scenario, orphan ports, which are ports not part of the vPC and only connected to one of the vPC peer switches, still receive the multicast stream. Option C correctly describes this behavior, where the multicast traffic is replicated to the ports that joined a given multicast group and the peer link, and the multicast traffic stream flows over the peer link to ensure that orphan ports receive the multicast stream in failure scenarios12.

References: = For a more in-depth understanding of multicast traffic flow in a vPC environment, you can refer to Cisco’s official documentation on multicast forwarding in vPC based on the location of the source1, as well as community discussions and technical articles available on the Cisco Community website

Option C meets the security hardening requirements for Cisco UCS C-Series servers’ out-of-band management. It ensures that all traffic is encrypted, uses nondefault ports, and provides private administrative sessions, which align with the company’s security policy

The ACI REST API is a programmatic interface that uses REST architecture to interact with the management information tree (MIT) of the Cisco Application Policy Infrastructure Controller (APIC). The API requires authentication for users to access and manipulate the objects in the MIT. The authentication is based on username and password credentials, and the API provides several methods to manage the session authentication. Two of these methods are:

• POST to aaaLogin. This method logs in a user and opens a session. The message body contains an aaa:User object with the name and password attributes, and the response contains a session token and cookie. The session token and cookie are required for subsequent requests to the API, and they have a limited validity period that can be refreshed.
• DELETE to aaaLogout. This method logs out a user and closes a session. The message body contains an aaa:User object with the name attribute, and the response contains a status code indicating the success or failure of the operation. The session token and cookie are invalidated and cannot be used for further requests to the API.

References := The information is based on the Cisco APIC REST API Configuration Guide, which explains the usage and features of the ACI REST API, including the authentication methods89.

 Policies that identify the connectivity between Endpoint Groups (EPGs) and the external connection when extending a bridge domain out of a Cisco ACI fabric are associated with L2Out and L3Out components. L2Outs are used to extend Layer 2 connectivity outside the ACI fabric, while L3Outs are used for Layer 3 external connections. These policies define how the ACI fabric will communicate with external networks

The Cisco UCS firmware Auto Sync Server policy includes several configuration settings that determine how and when firmware on servers is synchronized. The two available settings from the options provided are ‘User Acknowledge’ and ‘No Action’. ‘User Acknowledge’ requires an administrator to manually acknowledge firmware upgrades in the Pending Activities dialog box before they are applied. ‘No Action’ means no firmware upgrade is initiated on the server. These settings allow administrators to control the firmware synchronization process according to their operational policies and procedures.

References := Using Firmware Automatic Synchronization Server Policy - Cisco, Cisco UCS B-Series CLI Firmware Management Guide, Release 2.2

 Static ingress replication is a method used in VXLAN environments where the replication of multicast, broadcast, and unknown unicast traffic is manually defined. In the context of Cisco Data Center Core Technologies, Option A implements static ingress replication by explicitly specifying peers for replication using the ingress-replication protocol static command followed by the peer-ip command to define the IP address of the replication peer. This configuration is necessary when multicast routing is not an option in the underlay network.

References := For further details, one would typically refer to Cisco’s official documentation on VXLAN configurations and the Implementing and Operating Cisco Data Center Core Technologies (DCCOR) study materials, which provide in-depth explanations on the setup and management of network overlays including static ingress replication.

The OPTIONS method is used in REST APIs to return the HTTP methods that the server supports for a specific URL. This can be useful for discovering what functionality a REST API endpoint supports.

 Option D is the correct configuration set for initializing VXLAN Tunnel End-Point functionality on a Cisco Nexus 9000 Series platform. This option includes the necessary commands to configure the loopback interface, which is used as the source for the VXLAN Network Virtual Endpoint (NVE) interface, and the NVE interface itself, which is essential for VXLAN operation.

References := For a detailed guide on VXLAN configuration on the Cisco Nexus 9000 Series, you can refer to the Cisco Nexus 9000 Series NX-OS VXLAN Configuration Guide, which provides step-by-step instructions and best practices.

 In Cisco ACI, TCAM resources can be optimized by configuring a single contract that is provided and consumed by all EPGs within a VRF. This approach ensures that all EPGs consume the same services, thus reducing the number of individual contracts and associated TCAM entries. By having a common contract, the ACI fabric can efficiently manage access control policies and service insertion without the need for multiple, redundant entries in the TCAM, which can lead to resource exhaustion. References: The information is based on the best practices for TCAM management in Cisco ACI fabrics, as detailed in the Cisco community discussions and Cisco’s official documentation on TCAM resource issues and workarounds12. Additionally, the concept of using a single contract for multiple EPGs is supported by the Cisco ACI Endpoint Security Group (ESG) Design Guide, which outlines the steps for implementing a single ESG for open communication between subnets (EPG selectors)

In Cisco ACI, a virtual Port Channel (vPC) allows links that are physically connected to two different ACI leaf nodes to appear as a single port channel to a third device. When configuring vPCs in ACI, you do not need to create multiple interface policy groups for each vPC. Instead, you create a single vPC interface policy group that can be applied to multiple vPCs. This is because the fabric itself serves as the multi-chassis trunk (MCT), and peer reachability is managed through the fabric, not through physical peer-links. Therefore, for the scenario described, where two vPCs are created from leaf switches A and B, only one vPC interface policy group is required.

References := The information is based on the best practices from the Cisco guide on Virtual Port Channel (vPC) in ACI1 and the Cisco ACI fabric access policies configuration guide

 Option B is the correct configuration set that meets the requirements for the SAN users’ role. This configuration allows users to have show access to the system, SNMP, module, and hardware information, run debug zone and exec fcping commands, and restricts access to the show feature environment command2.

One of the benefits of independent resource scaling in Cisco HyperFlex hybrid architecture is the flexible expansion of compute, caching, and capacity. This allows for the addition of resources in the required ratios without being constrained by the limitations of traditional converged infrastructure3.

A characteristic of the install all command on the Cisco Nexus series switch is that it automatically checks the image integrity before performing the installation. The install all command is used to install a system image and kickstart image on the switch, as well as to upgrade the BIOS and other firmware components. The install all command performs a series of checks and validations before installing the images, such as verifying the compatibility, checksum, and signature of the images. This ensures that the images are not corrupted or tampered with, and that they match the hardware and software requirements of the switch. The install all command also performs a backup of the current configuration and images, and allows the user to abort the installation process if needed. References :=

• Implementing and Operating Cisco Data Center Core Technologies (DCCOR) v1.2, Module 3: Data Center LAN Network Connectivity, Lesson 3.4: Cisco Nexus 9000 Series Switches
• Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x), Chapter: Installing Software Images and EPLDs, Section: Installing System and Kickstart Images

To prevent users from modifying root policies, the system administrator can define a custom user role and assign it to users. A custom user role can have specific privileges and scope of access that are different from the predefined user roles. For example, a custom user role can have read-only access to the root policies, but full access to the organization policies. By assigning this custom user role to users, the system administrator can ensure that only authorized users can modify the root policies, while still allowing users to manage their own organization policies. This way, the system administrator can avoid accidental changes to the boot policy or other root policies that can impact all service profiles and their storage connectivity. References :=

• Implementing and Operating Cisco Data Center Core Technologies (DCCOR) v1.2, Module 5: Cisco Unified Computing System, Lesson 5.2: Cisco UCS Manager Administration
• [Cisco UCS Manager Administration Management Guide, Release 4.1], Chapter: User Management, Section: Creating a Custom User Role
• [Cisco UCS Manager GUI Configuration Guide, Release 4.1], Chapter: Managing Organizations and Locales, Section: Creating an Organization

POAP is an automatic provisioning and zero-touch deployment feature that assists device owners in the

initial deployment and configuration of Nexus switches.

The feature works by checking for a local configuration script. If the script has been deleted, the switch has

been reset to factory settings, or this is the first boot-up, the POAP daemon will connect to a preset list of

servers to download an initial configuration file.

To perform this operation, the switch must first obtain an IP address from a local DHCP server. POAP

configuration settings can also be passed through the DHCP response.

Which conditions should be verified, so they need to be TRUE. Like no startup (A) and bootup (B). C means

that it needs to miss a license file and E means it needs to miss an NX-OS image.

 To block traffic between a subset of endpoints in an EPG based on specific VM attributes and the rest of the VMs in that EPG, the correct set of actions would involve setting “Allow Microsegmentation” under the EPG VMM Domain Association to “True” and setting “Intra-EPG Isolation” to “Enforced” for both the EPG and the uSeg EPG. This configuration ensures that microsegmentation is allowed and that intra-EPG isolation is enforced, effectively blocking the specified traffic.

References:

• The Implementing and Operating Cisco Data Center Core Technologies (DCCOR) course provides insights into the implementation of data center technologies, including network, compute, storage network, automation, and security1.
• The Cisco Community articles on VMM Integration & Troubleshooting and ACI VMM integration provide practical guidance and troubleshooting tips for integrating VMM domains with Cisco ACI23.
• For detailed procedures and additional information, the configuration guides and training materials available on Cisco’s official website are valuable resources

1- feature netflow

2- flow exporter

3- flow monitor

4- interface

An advantage of NFS (Network File System) as compared to Fibre Channel is that NFS provides the dynamic allocation of storage capacity. This means that NFS allows the storage space to be allocated and released on demand, depending on the needs of the applications and users. NFS also enables the sharing of files and directories across different servers and clients, simplifying the management and access of data. Fibre Channel, on the other hand, is a protocol that provides high-speed and low-latency communication between storage devices and servers, but it requires fixed and pre-allocated storage capacity, which can lead to underutilization or overprovisioning of resources. Fibre Channel also requires dedicated hardware and cabling, which can increase the cost and complexity of the storage network.

References: For more information on NFS and Fibre Channel, please refer to the following resources:

• DCCOR: Fibre Channel & Storage Networking
• iSCSI vs. Fibre Channel

A strict CoPP (Control Plane Policing) policy is designed to manage the traffic flow of control plane packets to protect the control plane of routers and switches from being overwhelmed by unnecessary or malicious traffic. When a ping sweep, which involves sending ICMP echo requests to multiple hosts to identify live devices on a network, is performed on a network connected through a switch with a strict CoPP policy, excess ICMP packets can be dropped to prevent them from consuming excessive resources. References: Cisco Data Center Core Technologies source documents or study guide

To create a virtual Fiber Channel interface and associate it with an Ethernet physical interface, the correct configuration commands would be:

• Enter the interface configuration mode for the virtual Fiber Channel interface using the command interface vfc7.
• Bind the virtual Fiber Channel to the Ethernet interface using the command bind interface ethernet 1/7.

This configuration associates the virtual Fiber Channel interface with VSAN 7 and maps VLAN 700 to the VSAN, as required by the converged network adapter (CNA).

References := The explanation is based on standard practices for configuring virtual Fiber Channel interfaces in a Cisco environment, as detailed in Cisco’s data center configuration guides and technical documentation.

The benefit of adding Cisco HyperFlex Hardware Acceleration Cards to a HyperFlex deployment is increased compression efficiency. These cards are PCIe devices that offload the compression and decompression operations from the CPU, resulting in higher performance and lower latency for most storage workloads. The cards also reduce the CPU utilization and power consumption of the HyperFlex nodes, enabling more resources for other applications. The other options (offline encryption acceleration, increased network throughput, and GPU acceleration) are not benefits of the HyperFlex Hardware Acceleration Cards. References: For more information on the HyperFlex Hardware Acceleration Cards, please refer to the following resources:

• Configure HyperFlex Hardware Acceleration Cards
• Cisco HyperFlex Systems Installation Guide for VMware ESXi, Release 4.0
• Cisco HyperFlex HX240c M5 Data Sheet

https://www.cisco.com/c/en/us/td/docs/hyperconverged_systems/HyperFlex_HX_DataPlatformSoftware/

Installation_VMWare_ESXi/3_5/b_HyperFlexSystems_Installation_Guide_for_VMware_ESXi_3_5/

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 In a VXLAN data center fabric, inter-VNI communication requires mapping Layer 2 (L2) VLANs to their respective L2 VNIs and associating them with the correct Layer 3 (L3) VNI that corresponds to the VRF. In this case, VLAN 100 is mapped to L2 VNI 2020, and for inter-VNI routing to occur, it must be associated with an L3 VNI that corresponds to the VRF, which is Test_Telco_VRF to L3 VNI 1010. References: For more detailed information, you can refer to the Cisco Programmable Fabric with VXLAN BGP EVPN Configuration Guide1 and the Data Center VXLAN EVPN guide

Option A is the correct order of reloading components during the process of upgrading the EPLDs of the fabric modules for a Cisco MDS director-class switch. The EPLD upgrade is performed on one fabric module at a time, and the fabric module is reloaded after the upgrade. The other fabric modules and the switching platform are not reloaded during the process. References:

• Cisco MDS 9000 Family NX-OS Upgrade and Downgrade Guide, Release 8.x - Upgrading the EPLDs [Cisco MDS 9000 NX-OS and SAN-OS Software], Upgrading the EPLDs, Upgrading the EPLDs on a Cisco MDS 9700 Series Switch
• Cisco MDS 9000 Family NX-OS Upgrade and Downgrade Guide, Release 8.x - Upgrading the EPLDs [Cisco MDS 9000 NX-OS and SAN-OS Software], Upgrading the EPLDs, Guidelines and Limitations for Upgrading the EPLDs

The issue with the implementation is that zones are local to the MDS switch, and name service must be used to activate the connection between E ports. In Cisco MDS switches, zoning is enforced at the switch level. Each switch in a fabric can have a different active zone set or none at all. The name server for each switch only contains information about devices that are logged into that specific switch.

EIGRP authentication is used to prevent unauthorized devices from forming neighbor relationships. The correct CLI commands to establish EIGRP neighborship with authentication on Cisco Nexus switches involve configuring the interface with EIGRP, setting the EIGRP autonomous system number, and specifying the authentication key and key-chain. The commands in Option A are consistent with these requirements, hence it is the verified answer.

References: = For further details, you can refer to the official Cisco documentation on EIGRP authentication and configuration for Nexus switches available on the Cisco website.

 In a vPC (Virtual Port-Channel) configuration, multicast traffic is handled based on the vPC design and operational rules. When a host sends traffic to a multicast group, the vPC switches determine the forwarding path based on the source and the vPC domain configuration. If multicast traffic is received on a vPC member port, such as Po10 on Switch1, the traffic is typically forwarded out on all ports that are part of the same VLAN and have receivers interested in the multicast group, which includes Po1 and Po20 in this case. This ensures that the multicast traffic reaches all intended recipients across the vPC domain.

References: For a comprehensive understanding, the Cisco documentation on “Multicast forwarding in vPC based on location of the source” provides detailed scenarios and explanations on how multicast traffic is forwarded in a vPC environment1. Additionally, the “Cisco Nexus 9000 Series NX-OS Multicast Routing Configuration Guide” offers insights into the configuration and behavior of multicast routing on Nexus switches, which can be applied to understand the vPC behavior with multicast traffic

 An EPLD (Electronic Programmable Logic Device) upgrade on a Cisco Nexus 9000 Series Switch is used to upgrade the field-programmable gate arrays (FPGAs). FPGAs are integrated circuits that can be configured by a customer or a designer after manufacturing – hence “field-programmable”. They are used in Cisco switches to provide hardware functionalities in all modules, and EPLD image upgrades enhance hardware functionality or resolve known issues1.

References:

• Cisco Nexus 9000 Series FPGA/EPLD Upgrade Release Notes

The Maintenance Mode Profile feature in Cisco Nexus 7000 Series Switches is used to ensure a controlled shutdown of ports and graceful termination of routing protocols before performing a software upgrade12. References := Cisco Nexus 7000 Series NX-OS Software Upgrade and Downgrade Guide12.

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 The configuration set that meets the requirements for configuring port security on a Cisco MDS 9000 Series Switch is Option C. This option includes the command port-security activate vsan 4 force, which initiates the VSAN 4 port security database despite any conflicts. It omits the auto-learn command, indicating that new devices must be added manually. Additionally, the port-security distribute command ensures that configuration changes are applied throughout the fabric and any locks on the fabric are released, as required1.

References: = For more detailed information on port security configuration for Cisco MDS 9000 Series Switches, you can refer to the Cisco MDS 9000 Series Security Configuration Guide

 Promiscuous mode (D) allows a virtual machine to observe all traffic on the virtual switch, which is necessary for the virtual machine to receive all frames. VLAN (E) is used to map the frames to a specific Layer 2 network. These settings ensure that the virtual machine receives all traffic for the specified VLAN, fulfilling the requirements stated in the question1.

References: The configuration details and the role of these settings can be found in the Cisco documentation related to VDS port group parameters managed by APIC

NETCONF is the ideal solution for this scenario for the following reasons:

• Standards-based: NETCONF is built upon industry-standard protocols (XML, SSH, TLS) ensuring compatibility and adherence to open standards.
• Secure transport: NETCONF mandates secure transport mechanisms like SSH or TLS for communication between the automation software and managed devices, aligning with security requirements.
• Data Format: NETCONF utilizes XML for data encoding and transport, providing a human-readable and machine-parsable format that is easy to work with.
• Remote Device Automation: NETCONF is designed specifically for remote configuration and management of network devices, making it perfect for the task of automating remote device deployments.

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To test connectivity from the guest shell of the NX-OS, the command that should be used is ping vrf management [IP address]. This command sends ICMP Echo requests to the specified IP address within the management VRF, which is useful for verifying network connectivity from the guest shell environment.

References := For more detailed procedures and explanations, one would refer to the Cisco Data Center Core Technologies (DCCOR) study materials, which provide in-depth knowledge on managing and operating Cisco Nexus switches and their features, including the use of the guest shell for network connectivity tests.

• Enable telemetry features on the Cisco Nexus 9000 Series Switch to collect and send real-time data.
• Configure a secure transport mechanism, such as gRPC with TLS encryption, to ensure that the monitoring data is transmitted securely.
• Set up a subscription-based monitoring service that can process the telemetry data and provide insights into the network health.

In a vPC configuration, both Nexus switches (N7K-1 and N7K-2) are designed to work together to present themselves as a single logical entity to downstream devices. This design allows for a loop-free topology without the need for Spanning Tree Protocol (STP) to block any of the ports to prevent loops. As a result, both N7K-1 and N7K-2 share the same STP priority, making them appear as a single STP root to the rest of the network. This approach enhances the use of available bandwidth and provides redundancy without relying on STP to resolve loops.

References := The principles of vPC and its interaction with STP are well documented in Cisco’s technical literature, including the Implementing and Operating Cisco Data Center Core Technologies (DCCOR) course materials1. For a more detailed explanation, please refer to these resources.

When moving traffic between switches configured with NPV and NPIV features, it’s crucial to ensure that the NPV traffic management settings are correctly configured to handle the new interface allocation. This typically involves updating the NPV traffic-map and ensuring that the upstream NPIV core switch recognizes the new paths for the traffic. Additionally, the engineer may need to verify the zoning and VSAN configurations to ensure that the new interface is part of the correct VSAN and that the zoning allows for the FLOGI to be processed correctly on the new interface123.

References:

• Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x1.
• Cisco documentation on Configuring N Port Virtualization2.
• Cisco guide on N-Port Identifier Virtualization (NPIV) and N-Port Virtualization (NPV)

The Cisco UCS Lightweight Upgrade feature offers the benefit of updating the firmware version of a component only if there has been a modification. This means that not all components will be updated in every service pack, which can reduce downtime and the potential for disruptions caused by unnecessary updates1.

References := For more information on the Lightweight Upgrade feature, you can refer to the Cisco UCS Central Administration Guide, Release 2.0

 A community cloud Infrastructure as a Service (IaaS) deployment model is suitable for several companies that need to operate the same application environment and integrate it with third-party protocols. It allows the development team to have control over the infrastructure, including the operating system, Python interpreter, and libraries

The contract between EPG Client and EPG Web allows TCP communication initiated by the client toward the webserver with TCP destination port 80. This means that the host in EPG Client can establish a connection to the webserver in EPG Web on TCP port 80. However, the contract does not allow the webserver to initiate a connection back to the host on the same port, which is typically used for HTTP traffic.

References: The explanation is based on the understanding of Cisco Application Centric Infrastructure (ACI) contracts, which are used to define the communication between EPGs (Endpoint Groups). For more detailed information, refer to the Cisco Data Center Core Technologies source book and the ACI documentation available on Cisco’s official website.