In an environment that contains several Virtual SAN clusters on the same Layer 2 network, for the hosts in each cluster you must assign a unique multicast address so that they receive traffic only for the hosts in the cluster.
If you change the multicast address for an active Virtual SAN cluster, you must disable Virtual SAN on it.
Verify that SSH is enabled on the host.
- Open an SSH connection to a host in the Virtual SAN cluster.
- To identify the VMkernel adapters for Virtual SAN, run the esxcli vsan network list console command and write down the VMkernel adapter identifiers.
- To change the multicast address for the Virtual SAN cluster, run the esxcli vsan network set console command on each VMkernel adapter for Virtual SAN.
esxcli vsan network ip set -i vmkX -d agent_group_multicast_address -u master_group_multicast_address
For example, to set the master group multicast address to 18.104.22.168 and the agent group multicast address to 22.214.171.124 on VMkernel adapter vmk1 on the host, run this command.
esxcli vsan network ip set -i vmk1 -d 126.96.36.199 -u 188.8.131.52