From: Alvarez, Rolando [NCSUS] (RAlvare5@NCSUS.JNJ.COM)
Date: Tue Dec 16 2003 - 18:10:44 GMT-3
Even if the route was in the topology table of R1 via both R2 and R3 (which
I think Danny is saying it is not), if you look at the diagram, all things
left default, you can tell that R3 would be preferred. According to Danny,
it is not. That leads me to believe that the topology table only shows one
entry, from R2.
-----Original Message-----
From: arvindyadav@comcast.net [mailto:arvindyadav@comcast.net]
Sent: Tuesday, December 16, 2003 3:50 PM
To: Danny.Andaluz@triaton-na.com; kasturi_cisco@hotmail.com;
vdadlaney@comcast.net
Cc: ccielab@groupstudy.com
Subject: Re: Redistribute Connected Issue
ohhh I think I missed the ISIS part. now I understand, if you are using
redis connected on R3 then you have to permit loopback address in
router-map.
Now if you check eigrp topo in R1 there must be two route. It will prefer
which one has better metric. To prefer only 10.1..1.0/24 route via R3.
First check the metric of both the routes on R1 and make the necessary
changes is bandwidth or delay on R2 to make it less preferred ( redis eigrp
2 metric bw delay ??? ) command so that it get better metric via R3.
If you want all the routes (include ISIS) will prefer via R3 from R1 then
play the metric on R3.
regds
Arivnd
----- Original Message -----
From: <Danny.Andaluz@triaton-na.com>
To: <arvindyadav@comcast.net>; <kasturi_cisco@hotmail.com>;
<vdadlaney@comcast.net>
Cc: <ccielab@groupstudy.com>
Sent: Tuesday, December 16, 2003 3:03 PM
Subject: RE: Redistribute Connected Issue
> 1. If on R3 eigrp is enabled on loopback 0, then why do you need to redis
> connected. Just make sure you have network statement under eigrp
>
> router eigrp 2
> net 10.0.0.0
>
> I have to "redistribute connected" for connected isis interfaces that
won't
> be redistributed with "redistribute isis" under both EIGRP AS's.
>
> 2. If both the router R2 and R3 redistribute the AS2 to AS1 then R1 will
> get two route and both will external D EX. R1 will select the better
metric
> router.
> 3 R2 will be getting this router as internal
>
> This is what I expected, but not what I saw. R2 did have a D entry for
this
> network from R3 across AS 2. R2 was sending this route to R1, but R3 was
> not. Once I added R3's loopback to the ACL for the route-map for
> redistributing connected ISIS interfaces into EIGRP 1 and 2, R1 received
the
> route from R3 and chose R3 as the best path. It still had R2's path in
the
> topology table.
>
>
> 4. If redistribution ( as2 to as1) is happening only of R3 then R1 get
only
> one router i.e from R3.
>
> Danny
>
>
> -----Original Message-----
> From: arvindyadav@comcast.net [mailto:arvindyadav@comcast.net]
> Sent: Tuesday, December 16, 2003 2:44 PM
> To: kasturi cisco; Andaluz, Danilo, Triaton/NA; vdadlaney@comcast.net
> Cc: ccielab@groupstudy.com
> Subject: Re: Redistribute Connected Issue
>
>
> 1. If on R3 eigrp is enabled on loopback 0, then why do you need to redis
> connected. Just make sure you have network statement under eigrp
>
> router eigrp 2
> net 10.0.0.0
>
> 2. If both the router R2 and R3 redistribute the AS2 to AS1 then R1 will
> get two route and both will external D EX. R1 will select the better
metric
> router.
>
> 3 R2 will be getting this router as internal
>
> 4. If redistribution ( as2 to as1) is happening only of R3 then R1 get
only
> one router i.e from R3.
>
> I have simulated and I got two routes in eigrp topo on R1 and it select
best
> route via 150.50.124.6 (R3) because of better metric.
>
> R1# sh ip ei topo
> IP-EIGRP Topology Table for process 1
>
> Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
> r - Reply status
>
> P 10.1.1.0/24, 1 successors, FD is 409600
> via 150.50.124.6 (409600/128256), Ethernet0
> via 150.50.124.5 (412160/156160), Ethernet0
>
> R1#sh ip ro
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
> default
> U - per-user static route, o - ODR
>
> Gateway of last resort is not set
>
> 10.0.0.0/24 is subnetted, 1 subnets
> D EX 10.1.1.0 [170/409600] via 150.50.124.6, 00:01:31, Ethernet0
>
>
> regds
> Arvind
>
> ----- Original Message -----
> From: "kasturi cisco" <kasturi_cisco@hotmail.com>
> To: <Danny.Andaluz@triaton-na.com>; <vdadlaney@comcast.net>
> Cc: <ccielab@groupstudy.com>
> Sent: Tuesday, December 16, 2003 11:07 AM
> Subject: RE: Redistribute Connected Issue
>
>
> > Danny,
> >
> > I think what possibly is happening is when u have a route-map for
> > "redi connected" on R3 u are not including the Loopback on R3. so what
> > happens is the loopback wont go from R3 to R1.Since loopback is in
> > EIGRP it reaches R2 as (D) and then R1 (D EX) and hence R1 possible
> > has only 1 route to the loopback via R2.
> >
> > Does ur R1 routing table and/or toplogy table show 2 routes for the
> > loopback. Can u post the configs with route table for all 3.
> >
> > HTH.Let us know what u find.
> >
> > Good Luck,
> > Kasturi.
> >
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