From: tan (tan@dia.janis.or.jp)
Date: Mon Apr 14 2003 - 23:37:19 GMT-3
When you see FD-inaccessible in the topology output, it means it received
the route from a peer, and when eigrp submitted the route to the IOS route
election process, it lost out to another route. IOS sends it back to eigrp
and said sorry we already have another route with better AD. EIGRP then
keeps it in the database with the marking "inaccessible". Rip and igrp at
this point would flush the route completely I believe.
Most commonly this happens with external routes coming in to your eigrp
process from eigrp neighbor, then eigrp tags it with AD 170, and sends to
election process. It will lose out to an ospf route for example, and get
marked as "FD-inaccessible" in the output of show ip eigrp topology.
Checking for a route tagged with this marking is a simple way to determine
reduncancy without physically bringing a link down. When you are
practicing/configuring redundancy in your igp redistribution, this output is
nice to confirm.
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Cristian Henry H
> Sent: Tuesday, April 15, 2003 7:26 AM
> To: Nakia Stringfield; ccielab@groupstudy.com
> Subject: Re: About EIGRP and FD
>
>
> But, why/when EIGRP define a FD like a inaccesible one?, that is my
> question.
> Thanks.
>
> Nakia Stringfield ha escrito:
> >
> > the eigrp route is not installed in the routing table
> >
> > Cristian Henry H wrote:
> > >
> > > Somebody knows what is it mean?
> > >
> > > "FD inaccesible", it appears in a output of sho ip eigrp topology
> > >
> > > Thanks in advance.
> > >
> > > --
> > > Cristian E. Henry
> > > REUNA
> > >
> > > E-mail: chenry@reuna.cl
> > > Fono: 56-2-3370336
>
> --
> Cristian E. Henry
> REUNA
>
> E-mail: chenry@reuna.cl
> Fono: 56-2-3370336
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