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Upgrading Individual Devices in a Chassis Cluster Separately

Devices in a chassis cluster can be upgraded separately one at a time; some models allow one device after the other to be upgraded using failover and an in-service software upgrade (ISSU) to reduce the operational impact of the upgrade.

To upgrade each device in a chassis cluster separately:

During this type of chassis cluster upgrade, a service disruption of about 3 to 5 minutes occurs.

  1. Load the new image file on node 0.
  2. Perform the image upgrade without rebooting the node by entering:
  3. Load the new image file on node 1.
  4. Repeat Step 2.
  5. Reboot both nodes simultaneously.