[Pkg-libvirt-maintainers] Bug#574358: Bug#574358: libvirt-bin: libvirtd fails to autostart iscsi pool at boot time

[Nicolas Greneche]

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Guido Günther wrote:
> On Fri, Mar 19, 2010 at 09:15:54AM +0100, Nicolas Greneche wrote:
> [..snip..] 
>> I don't understand why after a sleep, my ARP cache works ... It's very
>> odd ...
> It is weird but looks like a networking setup issue to me rather than a
> libvirt issue. Your ping and tcpdump proves this. Seems like either the
> network interface isn't really up yet or a switch or similar is broken.
> 
> Although this isn't a libvirt issue we should try to find out what
> happens. Can you try to hook a bridge between your eth1 and the network
> switch and see if the arp request leaves your host at all? Maybe you can
> also use the switches diagnostic software. 
>

I had to time to dig it, putting a network TAP on the wire. It seems to
be a network issue because no ARP packet runs on the wire for eth1
(dedicated to iSCSI). So it's not a libvirtd problem, I think that this
problem can be marked as solved.

ARP works very well for the orther interface linked to a casual network.

> What kind of iSCSI target is this? Might it fail to generate the arp
> reply in time?

It's an equalogic iSCSI target. I heard about "jumbo frame" when
reseller came to introduice. Maybe there is a custom setting for MTU and
this switch.

> 
> Cheers,

Thanks for your help Guido,

Regards,

>  -- Guido
> 
> 


- --
Nicolas Greneche -  RSSI et Sysadmin
Centre de Ressources Informatiques (CRI)
Doctorant au sein du projet SDS - www.sds-project.fr
Mail : nicolas.greneche_(at)_univ-orleans.fr
GPG  : http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x5FEBD0EF

Universite d'Orleans            Web  : http://blog.garnett.fr
Batiment 3IA - 2e etage         Tel  : 02 38 49 25 26
6 rue Leonard de Vinci
BP 6102 45061 ORLEANS Cedex 2
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