To find the Multicast MAC address of a cluster, which command is recommended?

The recommended command to find the Multicast MAC address of a cluster is related to IGMP (Internet Group Management Protocol). The command cphaprob igmp is specifically designed to provide information about the IGMP configuration and status of the cluster. This includes details about the multicast addresses being used for the cluster's communication.

Understanding the context of IGMP is crucial, as it is the protocol used to manage multicast group memberships, which is essential for cluster operations in environments that utilize multicast for their communication between cluster members. By using this command, you can evaluate the multicast state, including the MAC addresses associated with those groups, which is vital for troubleshooting and ensuring efficient clustering operations.

Other commands have specific purposes but do not directly provide the Multicast MAC address. For example, the command that checks the interfaces and their statuses focuses on other aspects of the cluster setup rather than multicast addresses. Therefore, the choice that directly pertains to IGMP will yield the most relevant information for identifying the Multicast MAC address in a cluster configuration.