eigrp and managed ethernet

Stephen Kratzer kratzers at pa.net
Tue Sep 23 14:25:37 CDT 2008

On Tuesday 23 September 2008 13:46:02 Joseph Doran wrote:
> EIGRP timers over WAN media default to 60 seconds. Neighborship will not
> expire for up to 180 seconds. To verify your EIGRP neighborship do a "show
> ip eigrp neighbor"
> Message: 6
> Date: Tue, 23 Sep 2008 09:25:34 -0700 (PDT)
> From: Philip Lavine <source_route at yahoo.com>
> Subject: Re: eigrp and managed ethernet
> To: nanog <nanog at merit.edu>
> Message-ID: <542140.85408.qm at web30802.mail.mud.yahoo.com>
> Content-Type: text/plain; charset=us-ascii
> 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.

With regard to EIGRP, link type is dictated by the medium and speed. In this 
case, Ethernet will be considered a high-speed, broadcast link regardless of 
its use for LAN or WAN, so the hello/dead intervals should, by default, be 
5/15 seconds.

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