From: McCallum, Robert (Robert.McCallum@xxxxxxxxxxxxxxxxxx)
Date: Fri Jun 01 2001 - 11:23:21 GMT-3
Hi,
On Bootcamp lab 17 I have an issue with IGRP and the loopback addresses.
Scenario below:-
Router 8 from the bootcamp lab 17 is actually Router3 in mine.
Router 6 from the bootcamp lab is router6 in my lab.
SO
Router3 has loopback address of 15.15.3.3
It is running IGRP process 1 and has network 15.0.0.0 command in it. Now
ignoring all the ospf redistribution etc the loopback is not showing up on
router 6. Consigs and IP routing tables below:
ROUTER 3.
interface Loopback0
ip address 15.15.3.3 255.255.255.0
ip directed-broadcast
!
interface Serial0/0
description link to R6
ip address 10.1.10.3 255.255.255.0
no ip directed-broadcast
no ip mroute-cache
no fair-queue
interface Virtual-TokenRing10
ip address 172.27.1.1 255.255.255.0
no ip directed-broadcast
ring-speed 16
!
interface Virtual-TokenRing11
ip address 172.27.2.1 255.255.255.0
no ip directed-broadcast
ring-speed 16
!
router igrp 1
network 10.0.0.0
network 15.0.0.0
network 172.27.0.0
!
ip classless
ip default-network 200.200.200.0
IP ROUTING TABLE OF R3
I* 200.200.200.0/24 [100/9476] via 10.1.10.6, 00:00:27, Serial0/0
I 1.0.0.0/8 [100/9476] via 10.1.10.6, 00:00:27, Serial0/0
172.27.0.0/24 is subnetted, 2 subnets
C 172.27.2.0 is directly connected, Virtual-TokenRing11
C 172.27.1.0 is directly connected, Virtual-TokenRing10
10.0.0.0/24 is subnetted, 4 subnets
I 10.1.11.0 [100/9476] via 10.1.10.6, 00:00:27, Serial0/0
C 10.1.10.0 is directly connected, Serial0/0
C 10.3.1.0 is directly connected, Virtual-TokenRing1
C 10.2.1.0 is directly connected, TokenRing0/0
15.0.0.0/24 is subnetted, 1 subnets
C 15.15.3.0 is directly connected, Loopback0
CONFIG OF R6.
interface Serial0/0
description link to R3
ip address 10.1.10.6 255.255.255.0
clockrate 128000
!
router ospf 1
redistribute igrp 1 metric 33 subnets
network 10.1.5.0 0.0.0.7 area 10
network 15.15.6.0 0.0.0.255 area 10
!
router igrp 1
redistribute ospf 1 metric 2000 1000 255 100 1500
network 10.0.0.0
IP ROUTING TABLE OF R6.
O IA 200.200.200.0/24 [110/855] via 10.1.5.1, 01:29:13, Ethernet0/0
1.0.0.0/32 is subnetted, 1 subnets
O E2 1.1.1.1 [110/100] via 10.1.5.1, 01:29:13, Ethernet0/0
I 172.27.0.0/16 [100/8976] via 10.1.10.3, 00:00:06, Serial0/0
10.0.0.0/8 is variably subnetted, 10 subnets, 5 masks
O E2 10.1.11.0/24 [110/100] via 10.1.5.1, 01:29:13, Ethernet0/0
O IA 10.1.11.1/32 [110/10] via 10.1.5.1, 01:29:13, Ethernet0/0
C 10.1.10.0/24 is directly connected, Serial0/0
O IA 10.1.11.2/32 [110/74] via 10.1.5.1, 01:29:14, Ethernet0/0
O IA 10.1.11.8/32 [110/74] via 10.1.5.1, 01:29:14, Ethernet0/0
I 10.3.1.0/24 [100/8976] via 10.1.10.3, 00:00:08, Serial0/0
I 10.2.1.0/24 is possibly down,
routing via 10.1.10.3, Serial0/0
C 10.1.5.0/29 is directly connected, Ethernet0/0
O E2 10.40.0.0/16 [110/100] via 10.1.5.1, 01:29:15, Ethernet0/0
O E2 10.1.12.192/28 [110/100] via 10.1.5.1, 01:29:15, Ethernet0/0
15.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
O IA 15.15.99.99/32 [110/856] via 10.1.5.1, 01:29:15, Ethernet0/0
O IA 15.15.8.8/32 [110/75] via 10.1.5.1, 01:29:15, Ethernet0/0
O IA 15.15.7.7/32 [110/856] via 10.1.5.1, 01:29:15, Ethernet0/0
O 15.15.4.4/32 [110/11] via 10.1.5.4, 01:29:15, Ethernet0/0
O E2 15.15.1.0/24 [110/100] via 10.1.5.1, 01:29:15, Ethernet0/0
O E2 15.15.5.0/24 [110/44] via 10.1.5.1, 01:29:15, Ethernet0/0
C 15.15.6.0/24 is directly connected, Loopback0
IP ROUTING TABLE FOR R6 with the command show ip route igrp
R6#i igrp
I 172.27.0.0/16 [100/8976] via 10.1.10.3, 00:00:23, Serial0/0
10.0.0.0/8 is variably subnetted, 10 subnets, 5 masks
I 10.3.1.0/24 [100/8976] via 10.1.10.3, 00:00:23, Serial0/0
I 10.2.1.0/24 is possibly down,
routing via 10.1.10.3, Serial0/0
NOTE THE DISTINCT LACK OF THE 15.15.3.3 network.
My only question is WHY?
Robert McCallum
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