From: McCallum, Robert (Robert.McCallum@xxxxxxxxxxxxxxxxxx)
Date: Sat Jun 02 2001 - 06:57:38 GMT-3
Roman,
You are perfectly right about both routers sending the same info please see
below for debug ip igrp events and transactions. I cannot see any mention
of route rejection though. This is quite strange as I have now looked at
the answers and they have the same configs as me but in there routing table
the network shows up. Strange as it is though it shows up in and OSPF route
not an IGRP route. Any clues?
ROUTER 6 DEBUG
IGRP: sending update to 255.255.255.255 via Serial0/0 (10.1.10.6)
2d18h: subnet 10.1.11.0, metric=6000
2d18h: network 200.200.200.0, metric=6000
2d18h: network 1.0.0.0, metric=6000
2d18h: network 15.0.0.0, metric=501
2d18h: IGRP: Update contains 1 interior, 3 system, and 0 exterior routes.
2d18h: IGRP: Total routes in update: 4
2d18h: IGRP: received update from 10.1.10.3 on Serial0/0
2d18h: subnet 10.3.1.0, metric 8976 (neighbor 1125)
2d18h: subnet 10.2.1.0, metric 8539 (neighbor 688)
2d18h: network 172.27.0.0, metric 8976 (neighbor 1125)
2d18h: network 15.0.0.0, metric 8976 (neighbor 501)
2d18h: IGRP: Update contains 2 interior, 2 system, and 0 exterior routes.
2d18h: IGRP: Total routes in update: 4
ROUTER3 DEBUG
GRP: received update from 10.1.10.6 on Serial0/0
2d18h: subnet 10.1.11.0, metric 9476 (neighbor 6000)
2d18h: network 200.200.200.0, metric 9476 (neighbor 6000)
2d18h: network 1.0.0.0, metric 9476 (neighbor 6000)
2d18h: network 15.0.0.0, metric 8976 (neighbor 501)
2d18h: IGRP: Update contains 1 interior, 3 system, and 0 exterior routes.
2d18h: IGRP: Total routes in update: 4^Z
R3#
2d18h: %SYS-5-CONFIG_I: Configured from console by console
2d18h: IGRP: sending update to 255.255.255.255 via Serial0/0 (10.1.10.3)
2d18h: subnet 10.3.1.0, metric=1125
2d18h: subnet 10.2.1.0, metric=688
2d18h: network 172.27.0.0, metric=1125
2d18h: network 15.0.0.0, metric=501
2d18h: IGRP: Update contains 2 interior, 2 system, and 0 exterior routes.
2d18h: IGRP: Total routes in update: 4
-----Original Message-----
From: Roman Rodichev [mailto:rodic000@hotmail.com]
Sent: 02 June 2001 04:55
To: Robert.McCallum@let-it-be-thus.com; ccielab@groupstudy.com
Subject: Re: Bootcamp Lab 17 - IGRP issues
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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