Re: [Xen-users] second NIC MAC address for domU

[Simon Hobson <linux@xxxxxxxxxxxxxxxx>]

Jonathan M. McCune wrote:

> I have a server with two NICs running Xen 3.2 from Debian Lenny 
> (eth0 and eth1).  I'm wondering what the best method is to 
> effectively dedicate eth1 to a particular domU.  I have an existing 
> DHCP entry for the MAC address of eth1, so assigning a different MAC 
> to the virtual NIC in my domU and bridging that to eth1 within dom0 
> is an issue for me.  I tried assigning the identical MAC address to 
> my domU in the vif line in its config file.  tcpdump in dom0 
> suggests that the DHCP requests are making it out onto the network, 
> but the DHCP replies don't seem to be getting through to the domU.
Either use pciback.hide to make the hardware directly available to 
the guest, or ...
Create a bridge, so you'll end up with a physical device, and the 
Dom0 virtual device attached. Then attached a virtual interface for 
the guest to this bridge. The Dom0 doesn't need to have an IP address 
on the bridge, but you do need to bring up the interface (ip link set 
up dev ... IIRC) for it to pass traffic.
--
Simon Hobson

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