When show commands on an APIC in Cisco ACI fail to produce output, it often points to underlying issues that require careful analysis. Here are some potential causes and solutions:
Authentication or Session Timeout: Ensure your session is active and authenticated. Re-login if needed.
Insufficient User Privileges: Verify the account's role; it must have the necessary permissions to execute commands.
Database Sync or Resource Constraints: The APIC database might be experiencing sync issues. Try reloading the APIC if faults persist.
High CPU or System Faults: Check system health (acidiag avread) and address any detected faults.
Fabric Connectivity Problems: Verify fabric health (show fabric nodes) and ensure nodes are reachable.
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