Upgrade Guide for Cisco Catalyst 9000 Series Switches and Smart Switches

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Upgrade Guide for Cisco Catalyst 9000 Series Switches and Smart Switches

Verify application-hosting health

Updated: August 1, 2026

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Outlines procedures for verifying IOx service health, checking hosted application state, reviewing application details, and assessing resource utilization against pre-upgrade baselines to ensure application-hosting integrity after an upgrade.

Run these checks only when IOx or application hosting was in use before the upgrade.

Procedure

Verify IOx and hosted application health.
  1. Verify IOx service health.

    Example:

    
switch# show iox-service
IOx Infrastructure Summary:
---------------------------
IOx service (CAF)          : Running
IOx service (HA)           : Running
IOx service (IOxman)       : Running
Libvirtd                   : Running
Dockerd                    : Running
Application DB Sync Info   : Available

    The output shows that required IOx services are running. Exact services vary by platform and application configuration.

  2. Verify hosted application state

    Example:

    
switch# show app-hosting list
App id                           State
------------------------------------------------
MONITORING_APP                   RUNNING

    Every application that was running before the upgrade should return to RUNNING state.

  3. Review hosted application details

    Example:

    
switch# show app-hosting detail appid MONITORING_APP

>>>Application details are displayed

    Verify the application state, virtual interfaces, storage, and configuration against the pre-upgrade output.

  4. Review hosted application resource utilization.

    Example:

    
switch# show app-hosting utilization appid MONITORING_APP

>>> Application CPU, memory, and storage utilization are displayed

    Compare application utilization with the pre-upgrade baseline.

    Do further analysis on sustained resource exhaustion or a large unexplained change.