* Xen 3.3.1 live migration : unsolicited ARP
@ 2009-05-29 5:56 Olivier Blanc
2009-05-29 10:39 ` James Harper
0 siblings, 1 reply; 3+ messages in thread
From: Olivier Blanc @ 2009-05-29 5:56 UTC (permalink / raw)
To: xen-devel
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 ?
Here is my network architecture :
LAN0 LAN1
| |
+-----+-----------------------------------------------------+-----+
| | | |
| eth0 eth1 |
| | | |
| +---------------+--------------------+ | |
| | | | | |
| | +---------+---------+ +--------+--------+ | |
| | | | | | | |
| | | eth0.2 | | eth0.3 | | |
| | | | | | | |
| | | vif1.0 vif1.1 | | vif2.0 vif2.1 | | |
| | | tap1.0 tap1.1 | | tap2.0 tap2.1 | | |
| | +------+-------+----+ +----+-------+----+ | |
| | | | | | | |
| | +------+-------+-----------+-------+------+ | |
| | | | | | | | | |
| | | +----+-------+----+ +----+-------+----+ | | |
| | | | | | | | | | | | | |
| | | | eth0 eth1 | | eth0 eth1 | | | |
| | | | | | | | | | | | | |
| +-+-+ | | | +-+-+ | | | +-+-+ | | | |
| | | | | | | | | | | | | | | | |
| lvs ssh | | ssh www j2ee| | ssh www j2ee| | nfs |
| | | | | | | |
| Domain0 | | Domain1 | | Domain2 | | Domain0 |
+-----------+ +-----------------+ +-----------------+ +-----------+
I am working with Xen 3.3.1. Dom0 is an OpenSuse 11.1 kernel
2.6.27.21-0.1-xen
Thanks for your advices and help
Olivier
^ permalink raw reply [flat|nested] 3+ messages in thread* RE: Xen 3.3.1 live migration : unsolicited ARP
2009-05-29 5:56 Xen 3.3.1 live migration : unsolicited ARP Olivier Blanc
@ 2009-05-29 10:39 ` James Harper
2009-05-29 11:44 ` Olivier Blanc
0 siblings, 1 reply; 3+ messages in thread
From: James Harper @ 2009-05-29 10:39 UTC (permalink / raw)
To: Olivier Blanc, xen-devel
>
> 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
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: Xen 3.3.1 live migration : unsolicited ARP
2009-05-29 10:39 ` James Harper
@ 2009-05-29 11:44 ` Olivier Blanc
0 siblings, 0 replies; 3+ messages in thread
From: Olivier Blanc @ 2009-05-29 11:44 UTC (permalink / raw)
To: James Harper; +Cc: xen-devel
> >
> > 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
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2009-05-29 11:44 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2009-05-29 5:56 Xen 3.3.1 live migration : unsolicited ARP Olivier Blanc
2009-05-29 10:39 ` James Harper
2009-05-29 11:44 ` Olivier Blanc
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