[Linux-cluster] Re: help with fence_xvmd

[Jeff Sturm]

> -----Original Message-----
> From: linux-cluster-bounces at redhat.com 
> [mailto:linux-cluster-bounces at redhat.com] On Behalf Of vu pham
> Sent: Wednesday, May 13, 2009 3:05 PM
> To: linux clustering
> Subject: Re: [Linux-cluster] Re: help with fence_xvmd
> 
> You can overcome this by, if you use RHEL 5.3, adding -I 
> vnet0 ( or whatever device which domain-0 uses to communicate 
> with domU ) into the fence_xvmd 's parameter list .IIRC, this 
> parm -I does not exist on RHEL
> 5.2 or ealier. You can do that by adding FENCE_XVMD_OPTS="-I 
> vnet0" into /etc/sysconfig/cman.

On earlier versions you can also configure an explicit multicast route.

The following worked for us (xenbreth1 is the bridge device carrying the
DomU cluster traffic):

[root at xen01 ~]# cat /etc/sysconfig/network-scripts/route-xenbreth1
to multicast 224.0.0.0/4 dev xenbreth1

Jeff