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Re: [Linux-cluster] Are RHEL5 cluster comms different than RHEL4?

Leo Pleiman napisaƂ(a):
> Hello,
> $subject?
> Using an IBM bladecenter, we are able to build a RHEL4 cluster of which
> the nodes are in different chassis and different racks using a private
> vlan. When building a RHEL5 cluster, nodes which are NOT in the same
> chassis cannot join a cluster.
> Example:
> node1 is in chassis 1
> node2 is in chassis 3
> node3 is in chassis 3
> All nodes are using bond0:0 as their public interface with FQDN in
> /etc/hosts.
> All nodes are using bond0.999 as the private cluster interface with FQDN
> in hosts and cluster.conf.
> Under RHEL4 all nodes join to form a cluster.
> Under RHEL5 nodes 2 and 3 form a cluster but node1 never joins the
> cluster. Under RHEL5, when node1 tries to join the cluster there are NO
> messages in /var/log/messages that it is even trying to join the cluster.
> Any ideas?


First of all check if all nodes are in the same subnet, because cman
send data to brodcast address and udp/6809. I suppose that it is the
problem in Your case. You could use tcpdump to check traffic on
interfece bond0:0 and bond0.999.

Best Regards
Maciej Bogucki

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