ClusterXL monitors low and high VLANs. This causes problems during upgrade for customers with a disconnected monitored VLAN.
- When the lowest and highest VLANs are connected, upgrade completes successfully and both VLAN interfaces (low and high VLANs) are monitored.
- When the highest VLAN is disconnected, during upgrade this VLAN interface is marked as "UP" by cluster mechanism. Therefore, during the upgrade, the "
Interface active check" device reports its status as "problem".
As a result, one member goes into "
Active Attention", and the other member goes into "
Down" state (run the '
cphaprob state' command).
The same issue occurs in both Full Connectivity Upgrade (FCU) and Zero Downtime Upgrade.