WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

RE: [Xen-devel] Xen 3.3.1 live migration : unsolicited ARP

To: James Harper <james.harper@xxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] Xen 3.3.1 live migration : unsolicited ARP
From: Olivier Blanc <olivier.blanc@xxxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 29 May 2009 13:44:11 +0200
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 29 May 2009 04:44:46 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <AEC6C66638C05B468B556EA548C1A77D016DD508@trantor>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Organization: Minefi - DGFiP - SI 1C
References: <1243576573.10160.26.camel@bibi-3> <AEC6C66638C05B468B556EA548C1A77D016DD508@trantor>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> > 
> >  I would like to understand the condition that makes the live
> migration
> >  process to generate the unsolicited ARP REPLY, as I could never get
> it
> >  to be generated !
> > 
> > Do you have any pointer to help me understand the process ?
> > 
> 
> Do you have STP enabled on your bridge? If enabled, it could delay the
> bridge port coming up for long enough that the ARP packet gets lost.
> 
> James 

No STP is off in my bridge and forwardDelay is set to 0.

And the bridge port is ready very quickly, if I set the following
parameters value in the "ntable" of the bridge to 
reachable -> 12
delay_probe -> 20
ucast_probes -> 0

Then I lose only 2 ping transactions (less than 2 secs) to the migrated
DOMU. 

Olivier


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

<Prev in Thread] Current Thread [Next in Thread>