The following command displays the cluster protocol version running on a node:

# vxdctl list

This command produces output similar to the following:

Volboot file
version: 3/1
seqno: 0.19
cluster protocol version: 100
hostid: giga
entries:

You can also check the existing cluster protocol version using the following command:

# vxdctl protocolversion

This produces output similar to the following:

Cluster running at protocol 100