Lists the steps and indicators for verifying APIC controller cluster convergence through the GUI interface.
As described in Best practice: general failure considerations for ACI switch upgrades, the APIC controller cluster must be healthy in order to upgrade the ACI switch nodes successfully. You can verify the cluster convergence using the GUI.
Furthermore, you can monitor the progress of the cluster convergence after a scheduled maintenance. You view the Controller Firmware screen on the GUI, which presents you with a series of messages during the process of one cluster converging and then the next cluster. These messages are displayed in the Status field.
This may take a while. When all the clusters have converged successfully, you will see No in the Waiting for Cluster Convergence field of the Controller Firmware screen.