Best practices for enabling multicast traffic for Red Hat Cluster Suite on Cisco Catalyst switches

Solution Verified - Updated 2024-08-07T07:23:17+00:00 -

Issue

Nodes do not receive traffic being sent by other cluster members during bootup, which may result in a non-quorate cluster or a split brain scenario
There is a delay before network requests for nodes can be serviced.
Each node shows itself as online and the other(s) as offline.
Nodes are fenced during bootup.
Nodes are only able to form a cluster when CMAN is started manually, but not when started as part of the boot process.
Only one node is able to bring its cluster services online, while other nodes print messages similar to:
```
openais[1234]: [CMAN ] cman killed by node 1 because we rejoined the cluster without a full restart
```

Red Hat Cluster Suite 4+
Red Hat Enterprise Linux Server 5 (with the High Availability and Resilient Storage Add Ons)
Red Hat Enterprise Linux Server 6 (with the High Availability and Resilient Storage Add Ons)

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