[Linux-HA] Gratuitous ARP

[btinsley]

Yeah, I read your thread in the mailing list archives. These are Cisco's and
we're just using them as L2 switches... I know the gratuitous ARPs
work...just can't figure out why the problem would be restricted to just the
default gatway VIP on the LVS servers. I am wondering if there is some sort
of lock on the ARP table in the Linux kernel that is preventing the update
when the gratuitous ARPs arrive. That may be a stretch, but I haven't looked
at the code yet.



On 9/13/06, Vampire D <vampired at gmail.com> wrote:
>
> I had it happen where our switch (adtran) would not react properly to the
> gratuitous arp and they wrote a new version of the firmware that fixed the
> problem.
>
> On 9/13/06, btinsley <btinsley at gmail.com> wrote:
> >
> > Is anyone aware of a condition where a Linux server would not honor a
> > gratuitous ARP sent by heartbeat? I'm seeing this sporadically on a few
> > systems. I have two LVS servers in an active/passive configuration,
> which
> > provides the default gateway for another cluster. When the IP address
> for
> > the default gateway fails over to the passive server, the ARP tables on
> > the
> > other cluster servers is not updated. The heartbeat log shows the
> send_arp
> > command being executed and this was verified with a network capture. The
> > problem seems to be isolated to the IP address for the default
> gateway...
> > I've never seen it happen with any other virtual IP address.
> > _______________________________________________
> > Linux-HA mailing list
> > Linux-HA at lists.linux-ha.org
> > http://lists.linux-ha.org/mailman/listinfo/linux-ha
> > See also: http://linux-ha.org/ReportingProblems
> >
>
>
>
> --
> "Do the actors on Unsolved Mysteries ever get arrested because they look
> just like the criminal they are playing?"
>
> Christopher
> _______________________________________________
> Linux-HA mailing list
> Linux-HA at lists.linux-ha.org
> http://lists.linux-ha.org/mailman/listinfo/linux-ha
> See also: http://linux-ha.org/ReportingProblems
>