Re: [Xen-devel] Network-bridge script with bonding and vlan

[Ewan Mellor <ewan@xxxxxxxxxxxxx>]

On Fri, Oct 21, 2005 at 12:34:40AM +1300, Greg Brackley wrote:

> I'm trying to get the latest x86_64 development release running with eth0 & 
> eth1 bonded (using 802.3ad) with VLAN support.  I am trying to get a VLAN 
> support running with the intention of putting each domU on its own VLAN. 
> Given that the dom0 machine won't have an IP address on any of the domU 
> VLAN's, there should be reasonable network isolation between the domains.
> 
> I can get the bonding/vlan configuration working on a machine without Xen. 
> However I am having troubles getting the VLAN interfaces bridged correctly 
> to the xen0 and xenU domains vif interfaces. I'm unsure as to which 
> interfaces should have what MAC address, and/or how to do that.

Firstly, I would wait for the new network-bridge script to be pushed, or at
the very least use the one that Kurt Garloff posted to the list yesterday.

The topology we use is, in domain 0:

eth0 in dom0, virtual device, good IP address and physical device's MAC
|
(loopback)
|
vif0.0, virtual device bound to bridge, no IP, fake MAC
|
xenbr0, bridge interface, no IP, fake MAC
|
peth0, physical device, no IP, fake MAC

and for the guest domains

eth0, virtual device in guest domain, good IP address, and random MAC
|
(interdomain connection)
|
vif<domain id>.<device id>, in domain 0, bound to bridge, no IP, fake MAC
|
xenbr0, peth0 as above.

The physical device starts of as eth0, and then is renamed to peth0 by the
network-bridge script.

All the routing points at the interface with a good IP address.

The fake MAC address we use is FE:FF:FF:FF:FF:FF, which is this value for
reasons of compatibility with STP, but I don't understand this, I just do as
I'm told ;-)

HTH,

Ewan.

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