Xen users - Mar 2009 - Starting Xenbr0 looses connectivity

Hello,
I am installing xen-3.0.31 on debian-etch-r7 version (apt-get install
xen-linux-system-2.6.18-6-xen-686 screen ssh debootstrap python
python-twisted iproute bridge-utils libcurl3-dev libssl0.9.7). My eth0
is configured to get IP via dhcp (interfaces file attached). I am able
to boot into dom0, but starting xenbr0 causes loss of IP connectivity.

Here is what I do. Initially, my /etc/xen/xend-config.sxp looks like this
[...]
#(network-script network-bridge)
[...]
(network-script network-dummy)
[...]
(vif-script vif-bridge)
[...]
Now when I boot into dom0 - I can ping www.google.com. The output if
ifconfig is in the attached "before" file. Obviously, brctl show does
not show any bridge.

Then I comment out the network-dummy line, uncomment the
network-bridge line and reboot. This time, I can see (from the boot
messages) that the bridge xenbr0 is being created. Then when I log
into dom0, I cannot ping google.com

brctl show and ifconfig outputs are in the attached "after" file.

Any help in solving this will be greatly appreciated.




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2009/3/20 Girish V <girish.xen@gmail.com>:
> Hello,
> I am installing xen-3.0.31 on debian-etch-r7 version (apt-get install
> xen-linux-system-2.6.18-6-xen-686
Isn''t etch and Xen 3.0 somewhat old?
> Then I comment out the network-dummy line, uncomment the
> network-bridge line and reboot. This time, I can see (from the boot
> messages) that the bridge xenbr0 is being created. Then when I log
> into dom0, I cannot ping google.com
On Redhat, as I recall some really old version had this problem with
certain NICs. I think it''s NIC driver problem (something about it not
supporting bridge or vlan properly). Upgrading to latest version fixed
it.

In your case, you might want to try using Lenny, or try another NIC.

Regards,

Fajar

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I tried Lenny and Xen 3.0 - same problem.

I wanted to try lenny+xen 3.2.1 - but on installing xen and rebooting,
the boot fails and it begins rebooting - before I can see the messages
as to why it failed. I tried adding a noreboot option in the menu.lst
- but this seems to have no effect -  it reboots anyway, after xen
fails to boot.

Maybe I should try something else.
Thanks.

On Thu, Mar 19, 2009 at 8:18 PM, Fajar A. Nugraha <fajar@fajar.net>
wrote:
> 2009/3/20 Girish V <girish.xen@gmail.com>:
>> Hello,
>> I am installing xen-3.0.31 on debian-etch-r7 version (apt-get install
>> xen-linux-system-2.6.18-6-xen-686
>
> Isn''t etch and Xen 3.0 somewhat old?
>
>> Then I comment out the network-dummy line, uncomment the
>> network-bridge line and reboot. This time, I can see (from the boot
>> messages) that the bridge xenbr0 is being created. Then when I log
>> into dom0, I cannot ping google.com
>
> On Redhat, as I recall some really old version had this problem with
> certain NICs. I think it''s NIC driver problem (something about it
not
> supporting bridge or vlan properly). Upgrading to latest version fixed
> it.
>
> In your case, you might want to try using Lenny, or try another NIC.
>
> Regards,
>
> Fajar
>
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