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RE: [Xen-devel] Bridged Networking in Dom 0 and Virtual NIC in Windows X

To: <enming.teo@xxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] Bridged Networking in Dom 0 and Virtual NIC in Windows XP Home 32-bit HVM Guest
From: Caz Yokoyama <cazyokoyama@xxxxxxxxx>
Date: Sun, 23 Aug 2009 09:53:26 -0700
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
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Hello Teo,
I am not clear what you say. Could you tell me the IP address of domU?

-----Original Message-----
From: Mr. Teo En Ming (Zhang Enming) [mailto:enming.teo@xxxxxxxxxxxxxxx] 
Sent: Sunday, August 23, 2009 9:48 AM
To: cazyokoyama@xxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Bridged Networking in Dom 0 and Virtual NIC in
Windows XP Home 32-bit HVM Guest

Dear Caz,

I have the Intel Corporation 82567LM-3 Gigabit Network Connection on my 
Intel DQ45CB Desktop Board.

There is only one network interface on my computer and it is eth0.

When I start xend, it creates ethernet bridge eth0. My Dom 0 and Win XP 
Dom U share the same ethernet bridge.

On Dom 0, IP address is configured on the bridge eth0. In my Win XP dom 
U configuration, I specified vif = [ 'bridge=eth0' ]

So my Dom 0 and Dom U are sharing the same bridge, and hence the same 
physical network card.

Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics Engineering)
BEng(Hons)(Mechanical Engineering)
Technical Support Engineer
Information Technology Department
Asiasoft Online Pte Ltd
Tampines Central 1 #04-01 Tampines Plaza
Singapore 529541
Republic of Singapore
Mobile: +65-9648-9798
MSN: teoenming@xxxxxxxxxxx
Alma Maters: Singapore Polytechnic, National University of Singapore

On 08/24/2009 12:39 AM, Caz Yokoyama wrote:
> Hello Teo,
> What type of network device do you have? Virtual network or shared
> device? If you have virtual network, I suspect your domU and dom0 are in
> their own sub-network and the domU is not visible to anyone other than
> If you have shared physical device, root cause is something else.
> -caz
> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Mr. Teo En
> (Zhang Enming)
> Sent: Sunday, August 23, 2009 9:09 AM
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] Bridged Networking in Dom 0 and Virtual NIC in
> XP Home 32-bit HVM Guest
> Hi,
> My Intel DQ45CB motherboard BIOS has VT-d enabled. I am using Xen 3.4.1
> and Jeremy Fitzhardinge's paravirt ops dom 0 kernels 2.6.30-rc3 and
> 2.6.31-rc6.
> When Xen boots up, it says that I/O virtualisation is enabled (VT-d
> working).
> I have Windows XP Home 32-bit installed as a HVM guest. I am not trying
> direct access to physical NIC yet.
> I am still using virtual NIC in Win XP Home.
> When I configured IP address in Win XP HVM guest, I can ping the IP in
> Dom 0. In Dom 0, I can also ping the IP of my Win XP domU.
> However, other network devices/computers in the same LAN cannot see the
> IP of Win XP domU. Only Dom 0 can see. Similary, Win XP dom U can only
> talk to Dom 0 and cannot talk to other computers in the network.
> Why is this so?

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