1

Make sure that the cluster is configured in High Availability mode.

Make sure that one Cluster Member is in the Active state, and all other Cluster Members are in the Standby state.

Run the cphaprob state command on each Cluster Member.

2

Back up your current configuration.

Important - If you upgrade a VSX Cluster, then back up both the Management Server and the VSX Cluster Members. Follow sk100395: How to backup and restore VSX gateway.

3

See the Upgrade Options and Prerequisites.

4

See the Planning a Cluster Upgrade.

5

Upgrade the Management Server and Log Servers to R80.20 version.

6

Schedule a full maintenance window to make sure you can make all the desired custom configurations again after the upgrade.