Change the Multicast Address for a Virtual SAN Cluster

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.

Prerequisites

• Before you change the multicast address for an active Virtual SAN cluster, you must disable Virtual SAN on the cluster.
• Verify that SSH is enabled on the host.

Procedure

1. Open an SSH connection to a host in the Virtual SAN cluster.
2. To identify the VMkernel adapters for Virtual SAN, run the esxcli vsan network list console command and write down the VMkernel adapter identifiers.
3. 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 224.2.3.5 and the agent group multicast address to 224.2.3.6 on VMkernel adapter vmk1 on the host, run this command.

   esxcli vsan network ip set -i vmk1 -d 224.2.3.6 -u 224.2.3.5