RE: [Xen-users] Xen peth0 dropping

["John Cianfarani" <jcianfarani@xxxxxxxxxx>]

I'm not doing any bonding so your issue could be related to bonding.
Are you doing load balancing with the bonding or just failover?

I've disabled the network-script for the moment as I was planning on
using a custom setup anyhow, 1 for management and 1 for trunking with
domU's bridged into vlans.

Since disabling this, the network has stayed up and I've pounded it with
several hours of traffic with iperf.

Still very annoying and I would like to get to the bottom of the issue.

Thanks
John

-----Original Message-----
From: Artur Schiefer [mailto:aschiefer@xxxxxx] 
Sent: Monday, March 13, 2006 4:26 AM
To: John Cianfarani
Cc: xen-users
Subject: Re: [Xen-users] Xen peth0 dropping

hello,

i have no suggestion, sorry, but i just want to say that we have a
similar problem (see "network becomes unreachable under load"), which
wasn't the case with xen-2-testing(2.0.8). we are using a
bonding/teaming setup where the bridging scripts use
'brigde=brbonding0'.



Am Sonntag, den 12.03.2006, 19:03 -0500 schrieb John Cianfarani:
> I've got a Dell Poweredge 850 setup to do some testing with xen and I
> notice peth0 just seems to die quite frequently.
> 
> I don't really have to be doing anything for it to happen, no domU's
> running no real traffic other than ssh connections.
> 
> After this happens bringing eth0/xenbr0  down and up doesn't help only
> ifconfig peth0 down and then up seems to restore connectivity.
> 
>  
> 
> If I do a tcpdump -i peth0 while it's down I see no traffic at all.
> 
>  
> 
> I setup tcpdump -i peth0 while it was working and eventually it stops
> with the error:
> 
>  
> 
> tcpdump: pcap_loop: recvfrom: Network is down
> 
>  
> 
> and in /var/log/messages I find
> 
>  
> 
> Mar 12 17:51:09 nlnsrv1 kernel: xenbr0: port 2(peth0) entering
> disabled state
> 
>  
> 
>  
> 
> Does anyone have any suggestions as to what this could be?
> 
> I'm testing with Xen3.0.1 on CentOS 4.2.
> 
>  
> 
> Thanks
> 
> John 
> 
> 
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