On 07/29/2010 11:16 AM, Ofer Inbar wrote: > Using OpenAIS as part of attempting to run Red Hat Cluster Suite, > and I ran across an oddity. CentOS 5.3, openais-0.80.6-8.el5 > > In /etc/ais/openais.conf I have "mcastaddr: 239.245.0.45" > Debug logging is on. When I start service openais and then > start service cman, I see this in /var/log/messages: > > Jul 29 12:24:15 pol6opsintmr2 openais[29062]: [MAIN ] Using default multicast > address of 239.192.184.181 > > netstat -g, tcpdump, lsof, all show me that aisexec is using the > multicast address I configured, 239.245.0.45, and that nothing is > using 239.192.184.181. So what is the meaning of that log message, > and where does that "default" multicast IP come from? > -- Cos > _______________________________________________ > Openais mailing list > [email protected] > https://lists.linux-foundation.org/mailman/listinfo/openais
cman does not read /etc/ais/openais.conf. Instead it uses its own configuration file that is read from /etc/cluster/cluster.xml. The multicast address for cman is autogenerated by applying a hash function to the cluster name and using it as the lower 16 bits of the multicast address. A cman cluster will always have a multicast address of 239.192.x.x where x.x is the 16 bit hash produced from the cluster name. Regards -steve _______________________________________________ Openais mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/openais
