From: Andrzej Kowalczyk (Andrzej.Kowalczyk@xxxxxx)
Date: Tue Apr 24 2001 - 04:26:39 GMT-3
The problem is that you can't assign host address (/32) to serial
interface. Only loopback interface may have host address (/32) assigned.
Andrzej
2001-04-24 04:29:38 nobody@groupstudy.com wrote:
> RIP works different from IGRP for host routes.
> For IGRP, you might need to create a secondary address
> for segment between R1(s1)---to----R2(s1) that uses the same major
network
> and with 32-bit masking.
>
> Regards
> Chia Kim Seng
>
> SCS Networks Pte Ltd
> 7 Bedok South Road
> Singapore 469272
> Tel : 065-2403164
> Fax: 065-2403110
>
>
> -----Original Message-----
> From: Andrzej Kowalczyk [mailto:Andrzej.Kowalczyk@ccs.pl]
> Sent: Monday, April 23, 2001 9:45 PM
> To: ccielab@groupstudy.com
> Subject: RIP and IGRP host routes (/32) problem
>
>
> 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
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