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Re: [Linux-cluster] Cluster starts, but a node won't rejoin after reboot



Hi everyone,

I wanted to post the fix that we found for this issue.

The problem was that RHEL 5.x (3, and 4 too) uses IGMPv3 by default and our network is only using IGMPv2.  The server would send out an IGMPv3 packet that was ignored by the network and would not actually get to join any multicast groups until the network devices would send out a broadcast to see if any host wanted to join a multicast group.

I added the following to the sysctl.conf's of each node in the cluster and this issue has gone away.

# Force IGMPv2 due to Network environment
net.ipv4.conf.default.force_igmp_version = 2
net.ipv4.conf.all.force_igmp_version = 2

-Jeremy


On Thu, May 29, 2008 at 12:36 PM, Jeremy Lyon <jerlyon gmail com> wrote:

I'm having the exact same issue on a RHEL 5.2 system, and have a open support case with Redhat. When it will be resolved i can post the details ....

Any word on this?  I think I may get my own case going.  Do you know if a bugzilla got assigned to this?

Thanks!
Jeremy



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