One way to view the rac heartbeat ip address is to view the rac heartbeat ip address.

One way to view the rac heartbeat ip address is to view the rac heartbeat ip address.

A Method for viewing heartbeat IP addresses

Source: GI Fails to Start as no Private Network Interface is Available (Doc ID 1481176.1)

From ocssd. log:

16:28:07. 224: [CSSD] [3316] clssnmReadNodeInfo: NM endp for node 2 (racnode2)-gipc: // racnode2: my-cluster #192.168.0.2 #49921 ---> the heartbeat IP address must be located between the two ...... 16:28:09. 626: [CSSD] [2856] clssnmconnect: connecting to addr gipc: // racnode1: my-cluster #10.182.209.98 #49527 ---> the heartbeat IP address must be used between the two.

There may be questions: the above two lines are obviously different IP addresses. Why?
The reason is:

CauseThe issue only happens in 11.2.0.1 and 11.2.0.2. When GI is starting up, if it's unable to find the private interface due to hardware/OS issue, the public IP will be used. When another node starts up and tries to join the cluster, it uses private IP and fails to communicate.  SolutionTo resolve the issue: 1. Contact OS Admin and check why problem occurrred on the private interface. 2. After the network issue is resolved, restart GI so it will use private interface