[Linux-cluster] Multicast IP Address used in RHEL5 Cluster

[Patrick Caulfield]

Siman Hew wrote:
> Hi all,
> 
> In RHEL 5 cluster, by default, it uses multicast
> method.  Just wonder what range I should specify in
> cluster.conf, 239.192.000.000-239.251.255.255?
> What is default one?  How cluster choose it if I do
> not specify? 
> Looks like it is kind of random number chose when a
> cluster is started.


By default cman makes up a multicast address from the cluster ID, adding it to
the low bytes of 239.192.0.0 (for IPv4) or FF15:: (for IPv6). Those are
recommended internal multicast addresses.

-- 
Patrick