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[Xen-users] HVM Network Interfaces

To: Xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] HVM Network Interfaces
From: Jonathan Tripathy <jonnyt@xxxxxxxxxxx>
Date: Tue, 27 Jul 2010 08:40:15 +0100
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Hi Everyone,

In my HVM guest's config file, I have given my guest 3 interface. I have called them fw1, fw2 and fw3. I have joined each interface to a bridge on the Dom0. This does appear when I do a "brctl show". However, there are 3 other interfaces also added called tapx.0,tapx.1 and tapx.2 (Where x is the domain ID for the guest). Furthermore, I am only able to run tcpdump on the tap interfaces; if I run tcpdump on the fw1,fw2 or fw3 interfaces, no packets are detected.

This is a major issue when creating my firewall rules, as I wish to filter by interface, and I'm not entirely sure how to script it if the domain ID keep changing....

What is the point of the fw1-3 interfaces?

Any help is appreciated

Thanks

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