How do I change the TTL on multicast packets in a RHEL 6 cluster?

Solution Unverified - Updated

Environment

  • Red Hat Enterprise Linux (RHEL) 6 with the High Availability Add On
  • cman

Issue

  • How can I change the TTL on multicast packets in a RHEL 6 cluster?
  • How do we change TTL in the CMAN cluster.conf. (We use CMAN, so the corosync parameters have to be set in the cluster.conf).

Resolution

TTL on multicast packets can be changed in /etc/cluster/cluster.conf's <multicast> tag:

<cman>
   <multicast ipaddr="239.145.12.13" ttl="2"/>
</cman>
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