[Linux-cluster] OT? Odd Xen network issue

[Madison Kelly]

Hi all,

   I hope this isn't too off-topic being more a Xen than cluster 
experience, but I am having trouble with the Xen mailing list and I 
gather many here use Xen. If it is too off-topic, the please have a mod 
delete it and kick my butt. :)

I've got a simple two-node cluster, each with three NICs running CentOS 
5.3 x86_64. Each node has this configuration:

eth0 - Internal network and VM back channel (IPMI on this NIC)
eth1 - DRBD link
eth2 - Internet-facing NIC, dom0 has no IP

   I've built a simple VM that uses 'xenbr0' and 'xenbr2' as the VM's 
'eth0' and 'eth1', respectively. I've set a static, public IP to domU's 
eth1 (xenbr2) but I can't ping it from a workstation nor can the domU 
ping out. I know that the network itself (outside the server) is setup 
right as I tested the static IP from that cable earlier on a test machine.

   Could someone hit me with a clue-stick as to what I might be doing 
wrong? Let me know if any logs or config files are helpful.

Thanks!

Madi