RIP and IGRP host routes (/32) problem

From: Andrzej Kowalczyk (Andrzej.Kowalczyk@xxxxxx)
Date: Mon Apr 23 2001 - 10:44:31 GMT-3

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Hi All,

I'm working on RIP and IGRP protocols and I got a problem which I can't
solve. I noticed that RIP can send updates for host routes (with mask /32).
I can't force IGRP to do the same. Is it possible to do this in IGRP?

Look at the following situation:

(172.16.101.1/32 - Lo0)R1(S1 - 172.16.12.1/24)<=>(172.16.12.2/24 -
S0)R2(Lo0 - 172.16.102.2/32)

Using RIP:
R1:
interface Loopback0
ip address 172.20.101.1 255.255.255.255
!
interface Serial1
ip address 172.20.12.1 255.255.255.0
clockrate 56000
!
router rip
network 172.20.0.0
!

R1's routing table:
172.20.0.0/16 is variably subnetted, 3 subnets, 2 masks
C 172.20.12.0/24 is directly connected, Serial1
R 172.20.102.2/32 [120/1] via 172.20.12.2, 00:00:19, Serial1
C 172.20.101.1/32 is directly connected, Loopback0

R2:
interface Loopback0
ip address 172.20.102.2 255.255.255.255
!
interface Serial1
ip address 172.20.12.2 255.255.255.0
clockrate 56000
!
router rip
network 172.20.0.0
!

R2's routing table:
172.20.0.0/16 is variably subnetted, 3 subnets, 2 masks
C 172.20.12.0/24 is directly connected, Serial0
R 172.20.101.1/32 [120/1] via 172.20.12.1, 00:00:13, Serial0
C 172.20.102.2/32 is directly connected, Loopback0

Using IGRP:
R1:
interface Loopback0
ip address 172.20.101.1 255.255.255.255
!
interface Serial1
ip address 172.20.12.1 255.255.255.0
clockrate 56000
!
router igrp 25
network 172.20.0.0
!

R1's routing table:
172.20.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.20.12.0/24 is directly connected, Serial1
C 172.20.101.1/32 is directly connected, Loopback0

R2:
interface Loopback0
ip address 172.20.102.2 255.255.255.255
!
interface Serial1
ip address 172.20.12.2 255.255.255.0
clockrate 56000
!
router igrp 25
network 172.20.0.0
!

R2's routing table:
172.20.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.20.12.0/24 is directly connected, Serial0
C 172.20.102.2/32 is directly connected, Loopback0

Regards,

Andrzej Kowalczyk
**Please read:http://www.groupstudy.com/list/posting.html

Next message: Tariq Sharif: "Cisco 7000 ATM Module"
Previous message: Padhu (LFG): "RE: ISIS redistribution"
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Maybe reply: Chia Kim Seng, Consultant, SCSNW-Sales: "RE: RIP and IGRP host routes (/32) problem"
Maybe reply: Andrzej Kowalczyk: "RE: RIP and IGRP host routes (/32) problem"
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