Re: [Xen-users] one DomU, 2 IP =>why ? any ideas,

[Stéphane Cesbron <Stephane.Cesbron@xxxxxxxxx>]

Hi Denis,

> > I needed to switch one DomU from one IP to an other tonight.
> > I'm on centos 5.2 (Dom0 and DomU)
> > Therefore, I made a script using perl to make so. This script modify 
> > the IPADDR line in the following files :
> > - /etc/sysconfig/network-scripts/ifcfg-eth0
> > - /etc/sysconfig/networking/devices/ifcfg-eth0
> > - /etc/sysconfig/networking/profiles/default/ifcfg-eth0
> modifying "/etc/sysconfig/network-scripts/ifcfg-eth0" should be enough 
> I guess...
I know but I wanted to maintain consistency of my system.
> > Then I reboot the VM and it worked just fine. The VM was still 
> > reachable using its old ip address. I thought that was because I do 
> > not to have rebooted the Dom0.
> > I put my IP back in the above files and rebooted the Dom0 and DomU.
> > Nevertheless, my DomU is still reachable from the 2 different IPs.
> >
> > Any ideas/suggestions ?
> > I can't understand how it is possible. I tried to change the vif mac 
> > address but it is still the same.
> Could you post the output of ifconfig? Are you sure your forme IP 
> address was not bound to something else than eth0, like eth1 or eth2?
> When deploying linux vm, one common mistake is that when you change 
> the mac address, at boot up udev make a new rules and bind your new 
> mac address on eth1 or eth2 and up (depending on the last time you 
> cleaned up your /etc/udev/rules.d/xxx_net_xxx file. So eth0 is still 
> bound to the old mac address which is not existing anymore.
> I guess cleaning udev should be enough, otherwise could you please 
> post your ifconfig output.
I'll try tomorrow when I 'll get back to work.
I tried the ifconfig command today and got only the IP address from the 
"/etc/sysconfig/network-scripts/ifcfg-eth0" which is running.
We'll see tomorrow afternoon I think as I'll be busy all the morning.
> Cheers,
>
> Denis
>
>
>
> > Regards,
--

Stéphane Cesbron
Responsable Régional Informatique,
INSERM ADR Grand-Ouest,
BRETAGNE, PAYS DE LA LOIRE et CENTRE

63, quai Magellan
3ème étage - Hall B
B.P. 32116
44021 Nantes cedex 1

Email : stephane.cesbron@xxxxxxxxx
Tél : 02.40.20.92.28
Portable : 06.78.68.76.39
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