Re: [Xen-users] Bonding & xenbr0

[Stephan Seitz <s.seitz@xxxxxxxxxxxx>]

Hi,

I assume your switches expect another protocol. Depending on the
mode parameter of the bonding module NICs are getting different or
same MAC.

Did you encounter the problem without a bridge on bond0?

cheers

Stephan


Gerhard Spiegl schrieb:
> 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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>
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Stephan Seitz
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