RE: routing table question

From: Bill Dellamar (wdellamar@xxxxxxxxx)
Date: Mon Jan 08 2001 - 17:18:07 GMT-3


   
Ronnie,
What about longest match? I believe this is first.
For example: a rip learned route with a 28 bit mask
and a eigrp learned route with a 24 bit mask.
rip: 10.1.1.1/28
eigrp: 10.1.1.1/24

Both routes will appear in the table even though eigrp
has a lower admin distance.
thoughts,
Bill

--- Ronnie Royston <RonnieR@globaldatasys.com> wrote:
> Administrative Distance is what determines which
> route is added to the route
> table if multiple sources of routes are seen by the
> router. Once the
> routing protocol with the lowest administrative
> distance has been chosen,
> then multiple paths to a specific network may exist.
>
>
> You can influence how many routes to a specific
> destination network show up
> in your route table by using the 'maximum paths'
> command under IGRP, EIGRP,
> RIP, and OSPF. IGRP and EIGRP have, in addition, a
> 'variance' command that
> affords you the ability to tell the router to load
> balance over unequal cost
> paths.
>
> BGP is complicated with respect to getting routes to
> show up in the route
> table. That's a different thread all together.
>
> I hope that helps you. Good luck!
>
> -----Original Message-----
> From: David M Anderson [mailto:dma@cisco.com]
> Sent: Monday, January 08, 2001 11:34 AM
> To: ccielab@groupstudy.com
> Subject: routing table question
>
>
> I thought I would include a subject line this
> time...
> >Date: Mon, 08 Jan 2001 11:32:27 -0800
> >To: ccielab@groupstudy.com
> >From: David M Anderson <dma@cisco.com>
> >
> >I have a real simple question that I just don't
> seem to see the answer to.
> In which order are routes added to a routing table?
> I have tried to see if
> it is metrics, routing protocol, order
> learned.....etc. It seems to be the
> order learned, but I am not sure about that. Can
> anyone clarify?
> >
> >Thanks,
> >David
>
> David Anderson
> Lab Engineer
> (408) 853-5515
> dma@cisco.com
>
> | |
> :|: :|:
> :|||: :|||:
> .:|||||||:..:|||||||:.
> C I S C O S Y S T E M S
>
>



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