Xen users - May 2009 - strange network issue after upgrade to 3.4

Hi,

 

I was running XEN 3.3.1 using the debian packaged kernel
vmlinuz-2.6.26-2-xen-686

 

I ran the XEN 3.4 compile script and installed it ok.  I then modified
the grub config to use the new XEN build but i kept the kernel the same,
after all it is newer J

 

Now when booting the server it boots fine but there is no network
connectivity, if i then boot back into the old XEN build it works fine
so im puzzled as to why 3.4 would be upsetting the network when i using
the exact same kernel as before.

 

Anyone got any ideas? Im doing this on a test system so i don''t want to
go and do an upgrade on the live until i know what could be causing
this.

 

Thanks in advance

 

Ian

 

 



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On Fri, May 29, 2009 at 5:47 PM, Ian Tobin <itobin@tidyhosts.com>
wrote:
> I ran the XEN 3.4 compile script and installed it ok.  I then modified the
> grub config to use the new XEN build but i kept the kernel the same, after
> all it is newer J
So you only installed the hypervisor? Not the userland programs (xm,
xend, etc.) ?
>
> Now when booting the server it boots fine but there is no network
> connectivity, if i then boot back into the old XEN build it works fine so
im
> puzzled as to why 3.4 would be upsetting the network when i using the exact
> same kernel as before.
It might be be because mismatched hypervisor-userland version. Have
you tried installing the userland as well?

-- 
Fajar

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Ah, basically I was using the packaged version of XEN then just did an upgrade
from the source.

How would i install the other parts that you mentioned?

Thanks

Ian


-----Original Message-----
From: Fajar A. Nugraha [mailto:fajar@fajar.net] 
Sent: 29 May 2009 12:56
To: Ian Tobin
Cc: xen-users@lists.xensource.com
Subject: Re: [Xen-users] strange network issue after upgrade to 3.4

On Fri, May 29, 2009 at 5:47 PM, Ian Tobin <itobin@tidyhosts.com>
wrote:
> I ran the XEN 3.4 compile script and installed it ok.  I then modified the
> grub config to use the new XEN build but i kept the kernel the same, after
> all it is newer J
So you only installed the hypervisor? Not the userland programs (xm,
xend, etc.) ?
>
> Now when booting the server it boots fine but there is no network
> connectivity, if i then boot back into the old XEN build it works fine so
im
> puzzled as to why 3.4 would be upsetting the network when i using the exact
> same kernel as before.
It might be be because mismatched hypervisor-userland version. Have
you tried installing the userland as well?

-- 
Fajar



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

On Fri, May 29, 2009 at 6:59 PM, Ian Tobin <itobin@tidyhosts.com>
wrote:
> Ah, basically I was using the packaged version of XEN then just did an
upgrade from the source.
>
> How would i install the other parts that you mentioned?
How did you perform the upgrade? make install?

-- 
Fajar

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Yep,

Make
Make install



-----Original Message-----
From: Fajar A. Nugraha [mailto:fajar@fajar.net] 
Sent: 29 May 2009 13:01
To: Ian Tobin
Cc: xen-users@lists.xensource.com
Subject: Re: [Xen-users] strange network issue after upgrade to 3.4

On Fri, May 29, 2009 at 6:59 PM, Ian Tobin <itobin@tidyhosts.com>
wrote:
> Ah, basically I was using the packaged version of XEN then just did an
upgrade from the source.
>
> How would i install the other parts that you mentioned?
How did you perform the upgrade? make install?

-- 
Fajar



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

On Fri, May 29, 2009 at 7:02 PM, Ian Tobin <itobin@tidyhosts.com>
wrote:
> Yep,
>
> Make
> Make install
That''s odd. It should mean you''re using both the new
hypervisor and
userland. Can you try disabling xend''s startup (on RHEL this is
chkconfig) and see if networking works with the new hypervisor but
before xend''s bridging code takes place.

-- 
Fajar

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On Sun, May 31, 2009 at 6:18 PM, Fajar A. Nugraha <fajar@fajar.net>
wrote:
> On Fri, May 29, 2009 at 7:02 PM, Ian Tobin <itobin@tidyhosts.com>
wrote:
>> Yep,
>>
>> Make
>> Make install
>
> That''s odd. It should mean you''re using both the new
hypervisor and
> userland. Can you try disabling xend''s startup (on RHEL this is
> chkconfig) and see if networking works with the new hypervisor but
> before xend''s bridging code takes place.
Another note: when you install xen from sources, it overwrites scripts
on /etc/xen/scripts as well as the config /etc/xen/xend-config.sxp.
One of the difference is that Lenny''s packages uses network-dummy by
default, and you have to either:
- setup bridges manually, or
- edit xend-config.sxp to enable network-bridge.

Xen''s config uses network-bridge by default.

The thing is network-bridge from Lenny''s Xen-3.2 package did not work
for me (I kept getting "receive pakage with own address as source" or
something like that), while Xen 3.4''s version works. It might be the
other way around for you. If that''s the case then disabling xend
during during startup would at least make sure that networking
(modules, gateway, etc.) is OK, and that you only have to find
bridging setup that works for you (manual setup, Lenny''s, or Xen
3.4''s).

-- 
Fajar

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Hi,

 

Sorry about the delay, ive been away.

 

Ive disabled xen from starting up by remvoving the entries from
/etc/rc2.d but the network still fails to load although if you do a
ifconfig you can see eth0 with an IP address.

 

Thanks

 

Ian

 

 

On Sun, May 31, 2009 at 6:18 PM, Fajar A. Nugraha <fajar@xxxxxxxxx>
wrote:
> On Fri, May 29, 2009 at 7:02 PM, Ian Tobin <itobin@xxxxxxxxxxxxx>
wrote:
>> Yep,
>> 
>> Make
>> Make install
> 
> That''s odd. It should mean you''re using both the new
hypervisor and
> userland. Can you try disabling xend''s startup (on RHEL this is
> chkconfig) and see if networking works with the new hypervisor but
> before xend''s bridging code takes place.
 

Another note: when you install xen from sources, it overwrites scripts

on /etc/xen/scripts as well as the config /etc/xen/xend-config.sxp.

One of the difference is that Lenny''s packages uses network-dummy by

default, and you have to either:

- setup bridges manually, or

- edit xend-config.sxp to enable network-bridge.

 

Xen''s config uses network-bridge by default.

 

The thing is network-bridge from Lenny''s Xen-3.2 package did not work

for me (I kept getting "receive pakage with own address as source" or

something like that), while Xen 3.4''s version works. It might be the

other way around for you. If that''s the case then disabling xend

during during startup would at least make sure that networking

(modules, gateway, etc.) is OK, and that you only have to find

bridging setup that works for you (manual setup, Lenny''s, or Xen

3.4''s).

 

-- 

Fajar

 

 

 



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On Wed, Jun 10, 2009 at 10:05 PM, Ian Tobin<itobin@tidyhosts.com>
wrote:
> Hi,
>
>
>
> Sorry about the delay, ive been away.
>
>
>
> Ive disabled xen from starting up by remvoving the entries from /etc/rc2.d
> but the network still fails to load although if you do a ifconfig you can
> see eth0 with an IP address.
That''s odd.
Last suggestion from me: try pci=nomsi, and see if it helps.
http://lists.xensource.com/archives/html/xen-users/2009-06/msg00090.html

-- 
Fajar

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