For a cluster peer relationship, what is the minimum number of LIFs required per node?

For a cluster peer relationship, what is the minimum number of LIFs required per node?

• A. 0
• B. 1
• C. 2
• D. 3

Answer: (B)

A cluster peer relationship relies on network reachability between the nodes. A LIF is the reachable endpoint on a node, and at least one LIF on the cluster interconnect is needed so the nodes can exchange the control-plane messages, heartbeats, and coordination traffic that keep the peers in sync. With one LIF per node, the necessary communication path exists and the peer relationship can be established and maintained. Additional LIFs aren’t required for this minimum—they may be added for data traffic or redundancy, but they aren’t necessary for forming the peer relationship. Having zero LIFs would make the nodes unreachable to each other, preventing the peer relationship from forming. Therefore, the minimum is one LIF per node.

A cluster peer relationship relies on network reachability between the nodes. A LIF is the reachable endpoint on a node, and at least one LIF on the cluster interconnect is needed so the nodes can exchange the control-plane messages, heartbeats, and coordination traffic that keep the peers in sync. With one LIF per node, the necessary communication path exists and the peer relationship can be established and maintained. Additional LIFs aren’t required for this minimum—they may be added for data traffic or redundancy, but they aren’t necessary for forming the peer relationship. Having zero LIFs would make the nodes unreachable to each other, preventing the peer relationship from forming. Therefore, the minimum is one LIF per node.