Overview

This section provides command-line procedures for managing controller clusters and fabric nodes. It enables administrators to perform critical tasks such as node replacement, cluster contraction, and switch registration while providing diagnostic tools to verify system health and connectivity.

Best practices for cluster management

This topic explains best practices for cluster management, focusing on maintaining controller health, ensuring firmware consistency, and safeguarding data integrity during configuration, maintenance, and scaling operations to prevent data loss and cluster instability.

Replace a Cisco APIC in a cluster using the CLI

Learn how to replace a Cisco Application Policy Infrastructure Controller (APIC) by ensuring the replacement runs the same firmware version, decommissioning the old APIC, and commissioning the new one to maintain cluster integrity and functionality.

Cluster size reductions

Cisco APIC cluster contractions

This topic explains the cluster contraction procedure, which involves reducing a cluster's size by removing nodes sequentially, increasing the load on remaining nodes, and making decommissioned slots unavailable until re-enabled by operator input.

Switch over active APIC with standby APIC using CLI

Use this procedure to replace an active APIC with a standby APIC by executing the replace-controller command, and reset the failover status to ensure seamless transition and continuity in your network operations.

Verify Cold Standby Status Using the CLI

Learn how to verify the Cold Standby status of APIC by logging in as admin and using the show controller command to review the operational details and health of the fabric components.

Register an unregistered switch using the CLI

Use this procedure to add a switch to the pending registration list. The system checks if the node exists and registers it if present; otherwise, it adds the node using the CLI command.

Add a switch before discovery using the CLI

Use this procedure to add a switch to the Nodes Pending Registration tab on the Fabric Membership work pane using the CLI. The system checks if the node exists and registers it if necessary.

Remove a switch to maintenance mode using the CLI

Learn how to use the CLI 'show' commands to display the front panel ports and BGP protocol as active for debugging purposes while the switch is in maintenance mode, even though the interfaces are shut and BGP adjacencies are down.

Insert a switch to operation mode using the CLI

Use this procedure to insert a switch into operational mode using the CLI.

Configure a remote location using the NX-OS style CLI

Learn how to configure remote destinations in the ACI fabric for exporting techsupport or configuration files by setting up a remote path, specifying user credentials, and defining the protocol and server path.

Find the switch inventory using the NX-OS CLI

Learn how to identify your switch model and serial numbers using the NX-OS CLI by executing the show hardware command, which provides detailed hardware inventory information for your Cisco Nexus switch.

Verify the Cisco APIC cluster using the CLI

Learn how to verify the Cisco APIC cluster status using the cluster_health command introduced in Cisco Application Policy Infrastructure Controller (APIC) release 4.2(1), ensuring all nodes are active and properly synchronized for optimal performance.