On Fri, 2012-12-14 at 09:51 -0500, Digimer wrote: > On 12/14/2012 07:22 AM, Muhammad Sharfuddin wrote: > > On Fri, 2012-12-14 at 14:09 +0100, Fabian Herschel wrote: > >> -----BEGIN PGP SIGNED MESSAGE----- > >> Hash: SHA1 > >> > >> Hi Muhammad, > >> > >> also find my ansawer inline... > >> > >> On 12/14/2012 12:55 PM, Muhammad Sharfuddin wrote: > >>> On Fri, 2012-12-14 at 16:47 +0500, Muhammad Sharfuddin wrote: > >>>> please find me replies in-line > >>>> > >>>> On Fri, 2012-12-14 at 12:13 +0100, Fabian Herschel wrote: > >>>>> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > >>>>> > >>>>> As you are using Multcast (MCAST) > >>>>> > >>>> yes > >>>> > >>> so using Unicast instead of MCAST, would be a solution ? > >>> > >> > >> It COULD be a solution, if the network was the problem. > >> > > Ok, will try it. > > But as this problem is not **frequent**, I mean this cluster was running > > almost since 2 months without any error, therefore after switching to > > Unicast I have to wait for at least next 2 months to be sure that using > > Unicast is a fix. > > > >> Some years ago I wrote a tiny programm to send MCAST with > >> high load and to count drops - maybe I can reload the code > >> and sent it to you, if you are interested. Its GPL so free > >> to use under the terms of GPL and no warranty :) > >> > >> > > Waiting.. thanks, appreciated a lot. > > Cisco switch? > > I've heard of them (possibly others) periodically drop multicast groups > as a way to clean up stale groups, figuring the client will just > re-request membership. Trouble is, it takes too long so the cluster > fails. The answer is to set a static multicast group in the switch. > Thanks a lot for a nice explanation. But don't you think that easier and better solution is to use ucast ? > I believe you can use omping to test multicast. > thanks for pointing omping.
-- Regards, Muhammad Sharfuddin _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
