Failure Detection in IPMP

To ensure continuous availability of the network to send or receive traffic, IPMP performs failure detection on the IPMP group's underlying IP interfaces. Failed interfaces remain unusable until they are repaired. Remaining active interfaces continue to function while any existing standby interfaces are deployed as needed.

The in.mpathd daemon handles the following types of failure detection:

• Two types of probe-based failure detection:

  • No test addresses are configured (transitive probing).

  • Test addresses are configured.

• Link-based failure detection, if supported by the NIC driver