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Re: RE [Xen-users] Re: xen-3.0.4 networking problem after migration

To: Alain BARTHE <alain.barthe@xxxxxxxx>
Subject: Re: RE [Xen-users] Re: xen-3.0.4 networking problem after migration
From: Weikuan Yu <weikuan.yu@xxxxxxxxx>
Date: Tue, 19 Feb 2008 08:18:06 -0500
Cc: Xen-users@xxxxxxxxxxxxxxxxxxx, xen-users-bounces@xxxxxxxxxxxxxxxxxxx
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Alain BARTHE wrote:

xen-users-bounces@xxxxxxxxxxxxxxxxxxx a écrit sur 19/02/2008 06:30:54 :

 > I reply to my post earlier. It was a problem on the configuration file.
 > It appears that, when not using dhcp, live migration with static mac
 > address would cause a problem to IP in migrated domU.

We are also using xen 3.0.x, we are not using DHCP, we have static MAC address in our domU, and we never encountered such a problem in live migrations.

Maybe another explanation ?

Here is the line that caused trouble to domU.
# vif = [ 'mac=aa:00:00:00:b3:01, bridge=xenbr0' ]
compared to the following that works.
# vif = ['']

It could be due to 'bridge=xenbr0' then.

--Weikuan


 >
 > --Weikuan
 >
 > Weikuan Yu wrote:
 > > Hello,
 > >
 > > I am facing an networking problem for xen migration. I used to have it
 > > working fine. But as I worked with several trees, I lost track on the
 > > correct configuration I should have.
 > >
> > The problem is as this, with xen-3.0.4 on CentOS-4.4. I can install xen,
 > > start xend, and create domU, all fine.
 > > # xend start (on both nodes)
 > > # ssh node02 xend start
 > >
 > > Then create a domU on node01
 > > # xm create -c cvm.01
 > >
 > > At this point, I can ping this domU from many different nodes in the
 > > subnet. Then, I migrate it to node02
 > > # xm migrate cvm.01 -l node02
 > >
 > > Right after the migration, I can no long ping the domU. This domU now
 > > can only be ping'ed from the new host, node02. Interestingly, if I
> > migrate the same domU back to node01. Pinging works fine again from many
 > > different nodes.
 > >
 > > Anybody has seen this before? I know xen-3.0.4 is old by now. But want
 > > to avoid a new installation if possible.
 > >
 > > Can somebody offer a hint? Any help is appreciated.
 > >
 > > -- Weikuan
 > >
 >
 >
 > _______________________________________________
 > Xen-users mailing list
 > Xen-users@xxxxxxxxxxxxxxxxxxx
 > http://lists.xensource.com/xen-users

--
Weikuan Yu <+> 1-865-574-7990
http://ft.ornl.gov/~wyu/

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