Re: OSPF slow reconvergence

out of curiosity does the ASA and/or the Nortel support BFD with OSPF?

 --
Garry L. Baker

"With sufficient thrust, pigs fly just fine..." - RFC 1925

On Fri, Apr 29, 2011 at 5:00 PM, Matt Sherman <matt.sherman2_at_gmail.com>wrote:

> Hello,
>
> Just curious if anyone can shed some light on this. If you have OSPF hello
> and dead timers set to 1 and 4 respectively, shouldn't OSPF reconverge
> within 4 seconds of the loss of a neighbor? When I look at the routing
> debugs in Dynamips it takes 6 seconds from the notification of OSPF being
> down until the alternate route is added into the table.
>
> I have a real world scenario where we are peering Cisco ASA firewalls with
> Nortel ERS 8600 switches. The lowest the Nortel / Avaya engineers will
> allow us to go down to is 1 and 4. The switches do not have millisecond
> timers anyway so the lowest possible is 1 and 2. It's taking close to 10
> seconds in that case which is not a good thing for VOIP.
>
> Just wondering if this is the expected behavior for OSPF. The Avaya
> engineers don't think so but testing in Dynamips seems to confirm it is.
>
> Thanks,
> Matt
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Fri Apr 29 2011 - 17:52:14 ART