Re: EIGRP Challenge!

From: Joe Smith (j333smith@hotmail.com)
Date: Fri Feb 18 2005 - 19:03:38 GMT-3

This seems like a good reason:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt2/1cfeigrp.htm#wp1014482

Floating Summary routes.

>From: nenad pudar <nenad.pudar@gmail.com>
>Reply-To: nenad pudar <nenad.pudar@gmail.com>
>To: simon hart <simon.hart@btinternet.com>
>CC: Sundar Palaniappan <sundarp@gmail.com>, joshua lauer
><jslauer@hotmail.com>, Lee Donald <Lee.Donald@t-systems.co.uk>,
>Nathasha Aleyevka <naleyevka@yahoo.com>, ccielab@groupstudy.com
>Subject: Re: EIGRP Challenge!
>Date: Fri, 18 Feb 2005 15:32:48 -0500
>
>The answer above is right one if you do not need to see exact /24
>addresses(then you can do the summariization)
>You said you acheived that by changing the distance on R1 ,I am
>wondering how since distance is local to the router and it is not
>carried in routing update.
>
>Actually this triggers the question that I already asked myself
>z:what goal Cisco had in mind by adding the distance option for
>summary route..
>
>nenad
>
>
>On Fri, 18 Feb 2005 19:06:41 -0000, simon hart
><simon.hart@btinternet.com> wrote:
> > Sundar's answer is right
> >
> > The question you put states that R2 and R3 should see an admin distance
>of
> > 90.
> >
> > Some of the replies have suggested that you change the admin distance on
>R1,
> > however admin distance is only locally significant. If you change the
> > distance to 90 of the 172.168.1.0 routes on R1, R2 and R3 will still see
> > them as EIGRP external routes and add their own admin distance of 170.
>Thus
> > distance will not help in this situation.
> >
> > In fact one does need to add the 90 on the end of the summary statement.
> > The summary addresses will be seen as internal to the eigrp 100 process
>and
> > thus R2 and R3 will automatically apply an admin distance of 90.
> >
> > Simon
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > Sundar Palaniappan
> > Sent: 18 February 2005 16:34
> > To: joshua lauer
> > Cc: Lee Donald; Nathasha Aleyevka; ccielab@groupstudy.com
> > Subject: Re: EIGRP Challenge!
> >
> > Config you need on R1 is:
> >
> > int f0/0
> > ip summary-address eigrp 100 172.168.0.0 255.255.252.0 90
> > ip summary-address eigrp 100 172.168.4.0 255.255.254.0 90
> >
> > Hope this helps.
> >
> > --Sundar Palaniappan
> >
> > On Fri, 18 Feb 2005 11:16:12 -0500, joshua lauer <jslauer@hotmail.com>
> > wrote:
> > > I was thinking the same way. Nathasha, this is interesting what
>scenario
> > > book are you using or is this one you made up? Just curious, I'm going
>to
> > > try it out. Right off hand cant think of anything other than modifying
>the
> > > distance on R1.
> > >
> > > josh
> > >
> > > Joshua Lauer
> > >
> > > RHCE, MCSE, CCNA, CCDA, CCDP, CCNP, CCIP, CCSP,INFOSEC, CEH
> > >
> > > ----- Original Message -----
> > > From: "Lee Donald" <Lee.Donald@t-systems.co.uk>
> > > To: "Nathasha Aleyevka" <naleyevka@yahoo.com>;
><ccielab@groupstudy.com>
> > > Sent: Friday, February 18, 2005 10:42 AM
> > > Subject: RE: EIGRP Challenge!
> > >
> > > > Try the distance command on R1
> > > >
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: Nathasha Aleyevka [mailto:naleyevka@yahoo.com]
> > > > Sent: 18 February 2005 15:21
> > > > To: ccielab@groupstudy.com
> > > > Subject: EIGRP Challenge!
> > > >
> > > > Hi there,
> > > >
> > > > I have been working on the following scenario:
> > > >
> > > > | \ /
>|-----------------F0/0-R2
> > > > | EIGRP \ / |
> > > > | 101 \ / EIGRP 100 |
> > > > |--------------------R1-f0/0-------------- | 10.123.10.0/24
> > > > | --> / \ |
> > > > | / \
> > |-------------------F0/0-R3
> > > > BB1 / \
> > > >
> > > > R1 is running 2 EIGRP processes, EIGRP 101 to BB1 and EIGRP 100 to
>R2
> > and
> > > > R3
> > > > From BB1 Im receiveing the following routes:
> > > > 172.168.1.0/24
> > > > 172.168.2.0/24
> > > > 172.168.3.0/24
> > > > 172.168.4.0/24
> > > > 172.168.5.0/24
> > > > On R1, I redistributed between the 2 processes, therefore R2 and R3
>have
> > > > all
> > > > the 172.168.x.x/24 routes in the routing table with an admin
>distance of
> > > > 170. So far so good.
> > > > To meet the requirements, R2 and R3 should see these routes with and
> > admin
> > > > distance of 90, the config must be done on R1 and I am not allowed:
> > > > NOT ALLOWED to modify the administrative distance on R1
> > > > NOT allowed to use route maps
> > > > NOT allowed to use distribution lists/
> > > >
> > > > I was able to get it to work with route maps and modified the admin
> > > > distance, unfortunately that doesnt meet the requirements. Any
> > > > suggestions(!)
> > > > It is much appreciated
> > > > Thank you
> > > > Nathasha
> > > >
> > > >
> > > >
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