Hi Gerhard;
I'm pretty new to this list too but I think this may be a bonding issue.
What bonding mode are you using in /etc/modprobe.conf? You should have a couple
of lines in there:
alias bond0 bonding
options bond0 miimon=x mode=x
What kind of switch are you connecting to and have you done any specific
configuration to the switch to support your bonding mode? (depends on the mode).
Also can you provide /etc/sysconfig/network-scripts/ethx and bond0?
I have done some work recently with Bonding with Xen on Centos 5.1 and may be
able to offer some advice.
Best Regards
G
-----Original Message-----
From: xen-users-bounces@lists.xensource.com
[mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Gerhard Spiegl
Sent: 24 June 2008 11:58 AM
To: xen-users@lists.xensource.com
Subject: [Xen-users] Bonding & xenbr0
Hi List!
This is my first post on this list so let me say hello to all here!
I'm trying to set up HA xen VMs on RHEL 5.2 with Red Hat Cluster Suite.
XEN version used is original Red Hat packaged xen-3.0.3-64.el5_2.1.
Setup is the following:
eth0 + eth1 ==> bond0 (public interface, connected to two core switches with
one vlan)
eth2 (private interface connected to rack mounted 100Mbit switch for cluster
interconnect)
(this will be eth2 + eth3 ==> bond1 in future)
The xen network is working fine after adding "netdev=bond0" to the
(network-script ...) line in xend-config.sxp - no other changes were made.
But: Yesterday the network administrator complained about error messages in the
switch logs caused by multiple interfaces having MAC address FE:FF:FF:FF:FF:FF
since XEN was set up.
The only public interface with a configured IP is bond0 with the MAC of enslaved
eth0 so why is this strange MAC (FE:FF..) seen on the switch? We are also
wondering why eth0 and eth1 do have this MAC. Is there an issue with bonding and
xen bridging?
Output of ifconfig is attached, if you need more information, please let me
know.
I would be pleased if anyone could point me to a right direction - google
didn't help.
regards
Gerhard
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