Re: Default router advertised by EIGRP

From: Ram Shummoogum (rshummoo@ca.ibm.com)
Date: Fri Mar 07 2003 - 21:17:15 GMT-3


I was able to reproduce this. If you do a show ip ospf data on R2 you will
se e the 0.0.0.0.

on R2, Go under the OSPF process and configure default
information-originate and you will see the default on R3.

Cheers,
RAM

pearllee@t-online.de (Pearl)@groupstudy.com on 03/07/2003 05:32:44 PM

Please respond to pearllee@t-online.de (Pearl)

Sent by: nobody@groupstudy.com

To: <ccielab@groupstudy.com>
cc:
Subject: Default router advertised by EIGRP

Hi, Group,

A straightforward question but I just can not figure it out.....

R1(s0)----EIGRP-----(s0)R2 (s1)----OSPF------(s0)R3

R1 : advertises a default route to its loopback0 via EIGRP
R2 : redistributed between EIGRP and OSPF

Question:

Why R3 does not receive the default route advertised by R1?

Below is my config and their routing table respectively:

R1#sh run

interface Loopback0
 ip address 192.168.1.1 255.255.255.0
 no ip directed-broadcast
!
interface Serial0
 ip address 10.2.2.2 255.255.255.252
 no ip directed-broadcast
!
router eigrp 10
 redistribute static
 network 10.0.0.0
 network 192.168.1.0
 default-metric 64 100 255 1 1500
 no auto-summary
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.1.2

R2#sh run
Building configuration...

interface Serial0
 ip address 10.2.2.1 255.255.255.252
 no ip directed-broadcast
 clockrate 64000
!
interface Serial1
 ip address 10.1.1.2 255.255.255.252
 no ip directed-broadcast
 clockrate 64000
!
router eigrp 10
 redistribute ospf 10 metric 64 100 255 1 1500
 network 10.0.0.0
 no auto-summary
!
router ospf 10
 redistribute eigrp 10 metric 50 subnets
 network 10.1.1.0 0.0.0.3 area 1

R3#sh run
Building configuration...

interface Loopback0
 ip address 10.3.3.3 255.255.255.0
!
interface Serial0
 ip address 10.1.1.1 255.255.255.252
!
router ospf 10
 log-adjacency-changes
 network 10.1.1.0 0.0.0.3 area 1
 network 10.3.3.0 0.0.0.255 area 1
!

R1#sh ip ro

Gateway of last resort is 192.168.1.2 to network 0.0.0.0

     10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
D EX 10.3.3.3/32 [170/40537600] via 10.2.2.1, 00:33:58, Serial0
D 10.1.1.0/30 [90/2681856] via 10.2.2.1, 01:03:23, Serial0
C 10.2.2.0/30 is directly connected, Serial0
C 192.168.1.0/24 is directly connected, Loopback0
S* 0.0.0.0/0 [1/0] via 192.168.1.2

R2#sh ip ro

Gateway of last resort is 10.2.2.2 to network 0.0.0.0

     10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
O 10.3.3.3/32 [110/65] via 10.1.1.1, 00:36:35, Serial1
C 10.2.2.0/30 is directly connected, Serial0
C 10.1.1.0/30 is directly connected, Serial1
D 192.168.1.0/24 [90/2297856] via 10.2.2.2, 00:39:30, Serial0
D*EX 0.0.0.0/0 [170/40537600] via 10.2.2.2, 00:39:30, Serial0

R3#sh ip ro

Gateway of last resort is not set

     10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
O E2 10.2.2.0/30 [110/50] via 10.1.1.2, 00:37:36, Serial0
C 10.3.3.0/24 is directly connected, Loopback0
C 10.1.1.0/30 is directly connected, Serial0
O E2 192.168.1.0/24 [110/50] via 10.1.1.2, 00:37:36, Serial0
R3#

Why R3 can not learn the default route advertised from R1??

Any hint are appreciated!

Porta



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