> On 22 Oct 2014, at 2:15 am, John Scalia <jayknowsu...@gmail.com> wrote:
> 
> Hi all, again,
> 
> My network engineer and I have found that the VM's hypervisor was set up to 
> block multicast broadcasts by our security team.

Blocked or lost?

These links might be worth a look:

  https://access.redhat.com/solutions/784373
  https://bugzilla.redhat.com/show_bug.cgi?id=880035

> We're not really certain why or if we can change that for at least my 3 
> systems. He's speaking with them now. Anyway, as you don't have to configure 
> corosync on CentOS or Redhat, and there isn't even an 
> /etc/corosync/corosync.conf on these systems, what problems could I cause by 
> creating a config file and would the system actually use it on a restart? I 
> want to try setting the multicast address to a unicast one, at least for 
> testing.
> 
> This whole setup seems a little odd since CentOS uses CMAN and pacemaker, but 
> corosync is getting started and I see all the systems listening on port 5404 
> and 5405 similar to as follows:
> 
> udp    0    0 10.10.1.129:5404            0.0.0.0:*
> udp    0    0 10.10.1.129:5405            0.0.0.0:*
> udp    0    0 239.192.143.91:5405     0.0.0.0"*
> 
> So, if CentOS uses CMAN and pacemaker, why is corosync still in the mix?

CMAN == corosync + some magic that gets loaded as a plugin

> --
> Jay
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