From: Roman Rodichev (rodic000@xxxxxxxxxxx)
Date: Sat Jun 02 2001 - 00:54:35 GMT-3
I haven't tried this lab.
R6 redistributes OSPF 15dot routes into IGRP. IGRP on R6 will attempt to
send them across 10dot link as a 15.0.0.0/8 route. At the same time you got
R3 sending the 15.0.0.0/8 route to R6. They both will not accept 15.0.0.0/8
coming from another neighbor.
Do debugging on IGRP, you should see both routers denying that route.
>From: "McCallum, Robert" <Robert.McCallum@let-it-be-thus.com>
>Reply-To: "McCallum, Robert" <Robert.McCallum@let-it-be-thus.com>
>To: "'Ccielab' (E-mail)" <ccielab@groupstudy.com>
>Subject: Bootcamp Lab 17 - IGRP issues
>Date: Fri, 1 Jun 2001 15:23:21 +0100
>
>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
>**Please read:http://www.groupstudy.com/list/posting.html
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