[108075] in North American Network Operators' Group
RE: eigrp and managed ethernet
daemon@ATHENA.MIT.EDU (Brian Knoll)
Tue Sep 23 12:34:08 2008
From: Brian Knoll <bknoll@7ticks.com>
To: Philip Lavine <source_route@yahoo.com>, nanog <nanog@merit.edu>
Date: Tue, 23 Sep 2008 09:33:52 -0700
In-Reply-To: <542140.85408.qm@web30802.mail.mud.yahoo.com>
Errors-To: nanog-bounces@nanog.org
The issue may be that only one direction of traffic is being impacted. So =
maybe your A end is receiving all the hellos, while the Z end is not. Ther=
efore A still has Z as a neighbor, but Z doesn't have A as a neighbor.
Brian Knoll
-----Original Message-----
From: Philip Lavine [mailto:source_route@yahoo.com]
Sent: Tuesday, September 23, 2008 11:26 AM
To: nanog
Subject: Re: eigrp and managed ethernet
What is really bizarre is that I am down for minutes not seconds and the ti=
mers never fire. If I don't manually passive the connection eigrp will for =
some reason think there is a neighbor even though I am unable to source pin=
g across the WAN.
----- Original Message ----
From: Matthew Huff <mhuff@ox.com>
To: Philip Lavine <source_route@yahoo.com>; nanog <nanog@merit.edu>
Sent: Tuesday, September 23, 2008 8:59:14 AM
Subject: RE: eigrp and managed ethernet
Correct. Eigrp neighbor connectivity has a short-cut when L2 connectivity g=
oes down, otherwise it will use the eigrp neighbor hold-down timer. You can=
decrease that timer:
interface fa0/0
ip hello-interval eigrp p x
ip hold-time eigrp p y
where p is your eigrp as-number, and x is how often you want the hello (in =
seconds) and y is the max hold-down timer. Generally y is =3D x * 3
http://www.cisco.com/en/US/docs/ios/12_2/iproute/command/reference/1rfeigrp=
.html
----
Matthew Huff | One Manhattanville Rd
OTA Management LLC | Purchase, NY 10577
www.ox.com | Phone: 914-460-4039
aim: matthewbhuff | Fax: 914-460-4139
-----Original Message-----
From: Philip Lavine [mailto:source_route@yahoo.com]
Sent: Tuesday, September 23, 2008 11:43 AM
To: nanog
Subject: eigrp and managed ethernet
For some reason when I lose layer 3 connectivity between two managed Ethern=
et sites EIGRP does not bounce.Is this because the physical interface does =
not bounce?
