On Thu, 1 Jun 2006, Riaan van Niekerk wrote: > Riaan van Niekerk wrote: > > Is there any reason or advantage to use multicast over broadcast, which > > offsets the complexity of multicast (relative to broadcast), e.g more > > control, less traffic, others? > > Generally multicast behaves the same as broadcast. The only time you would > need multicast is if your nodes are on different subnets - in which case > you > would also have to make sure the router had sufficiently low latencies to > support clustering over it. > > tnx Patrick The RHCS 4 documentation does not give a recommendation for a multicast address. cman man page and http://sources.redhat.com/cluster/doc/usage.txt mention 224.0.0.1, which is a non-routable multicast address range, 224.0.0.0/24 . So if I understand this correctly: Using this address or anything in the 224.0.0.0/24 range would give the exact same effect as long as nodes are on the same subnet. If nodes are on different subnets, a multicast address in another network should be used (e.g. RHCS 3 defaults to 225.0.0.11). Riaan -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
