[Linux-cluster] multicast howto
Wolfgang Pauli
pauli at grey.colorado.edu
Thu Apr 27 00:45:35 UTC 2006
Thanks!
First, I had to figure out how multicast works. Still don't fully understand
it. I can ping 224.0.0.1 and I get responses from all hosts in the same
subnet. It tried to ping 225.0.0.8 but that does not really work. But I don't
know whether it has to.
I have changed the cluster.conf to have only two nodes. Just to get the basic
understanding. I have node dream on subnet 210 and neo on 223. They still
form their own clusters. Should I just try different addresses, or do the
switches/routers have to be programmed for that?
regards,
wolfgang
<?xml version="1.0" ?>
<cluster config_version="2" name="alpha_cluster">
<fence_daemon post_fail_delay="0" post_join_delay="3"/>
<clusternodes>
<clusternode name="dream" votes="1">
<multicast addr="225.0.0.9" interface="eth0"/>
<fence>
<method name="1">
<device name="human"
nodename="dream"/>
</method>
</fence>
</clusternode>
<clusternode name="neo" votes="1">
<multicast addr="225.0.0.9" interface="eth0"/>
<fence>
<method name="1">
<device name="human" nodename="neo"/>
</method>
</fence>
</clusternode>
</clusternodes>
<cman expected_votes="1" two_node="1">
<multicast addr="225.0.0.9"/>
</cman>
<fencedevices>
<fencedevice agent="fence_manual" name="human"/>
</fencedevices>
<rm>
<failoverdomains/>
<resources/>
</rm>
</cluster>
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