eigrp and managed ethernet

Stephen Kratzer kratzers at pa.net
Tue Sep 23 11:48:50 CDT 2008


Be sure to differentiate between unicast and multicast reachability. Try 'ping 
224.0.0.10'.

Stephen Kratzer

On Tuesday 23 September 2008 12:25:34 Philip Lavine wrote:
> What is really bizarre is that I am down for minutes not seconds and the
> timers 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
> ping across the WAN.
>
>
>
> ----- Original Message ----
> From: Matthew Huff <mhuff at ox.com>
> To: Philip Lavine <source_route at yahoo.com>; nanog <nanog at 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
> goes 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 = 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 at 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
> Ethernet sites EIGRP does not bounce.Is this because the physical interface
> does not bounce?




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