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I'm trying to make two physical interfaces visible to a Xen machine.

I followed the guide (, and created two Xen bridges for two physical interfaces / updated the guest config file with the new bridge.

The problem is that my guest machines are still unable to see the eth1.

I'll appreciate anyone who had success with this posting any notes or checklist.

The host (Dom0) is CentOS 5.5 64-bit, guest is CentOS 5.3 64-bit. The used Xen is version 3.0.3.


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Here is the output of brctl show: – SyRenity Apr 11 '11 at 11:16
Here is the DomU config file: – SyRenity Apr 11 '11 at 11:17
Ifconfig output: – SyRenity Apr 11 '11 at 11:20
Have you considered using PCI passthrough for the NICS? – Mister IT Guru Apr 20 '11 at 21:16
xm create -n shows two NICs? Have you stopped your vm, deleted it from management and recreated it (whith new or create)? – Nils Aug 30 '11 at 20:43
up vote 1 down vote accepted

This has a few links and seemingly a solution: Xen NICs

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I have the part described there set-up successfully, including normal output from the brctl show command with two – SyRenity Apr 11 '11 at 11:15
Please see above the rest of diagnostic output. – SyRenity Apr 11 '11 at 11:21
I have to admit I'm stumped. What's route -n show ? Maybe someone else can chip in too. – Jonathan Ross Apr 11 '11 at 11:40

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