From: Craig Dorry (chdorry@yahoo.com)
Date: Thu Sep 12 2002 - 08:37:55 GMT-3
Dmitris - This is expected behavior and is a result of
discontiguous networks. Has to deal with RIP/IGRP not
sending subnet mask information with route update.
Check out this link:
http://www.cisco.com/warp/public/105/55.html
--- Dimitris Vassilopoulos
<Dimitris.Vassilopoulos@eurodyn.com> wrote:
> Hello all,
>
> The whole issue is about the RIP/IGRP sending and
> accepting routes...
>
> Here is the topology:
>
> R1 ------- R2 -------- R4
> (rip) (rip&igrp) (igrp)
>
> R1
>
> !
> interface Loopback0
> ip address 200.0.0.1 255.255.255.255
> no ip directed-broadcast
> !
> interface Loopback10
> description SIM TOK-RING
> ip address 150.50.18.1 255.255.255.0
> no ip directed-broadcast
> ip ospf network point-to-point
> !
> interface Ethernet0
> ip address 150.50.200.1 255.255.255.0
> no ip directed-broadcast
> !
> interface Serial0
> ip address 150.50.17.1 255.255.255.0
> no ip directed-broadcast
> no ip mroute-cache
> no fair-queue
> !!
> router rip
> redistribute connected metric 2
> network 150.50.0.0
> distribute-list 1 out Serial0
> !
> ip classless
> !
> access-list 1 permit 150.50.200.0 0.0.0.255
> access-list 1 permit 150.50.18.0 0.0.0.255
> access-list 1 permit 200.0.0.0 0.0.0.255
> !
>
>
> R2
>
> !
> interface Loopback0
> ip address 200.0.0.2 255.255.255.255
> no ip directed-broadcast
> !
> interface Serial0/0
> ip address 150.50.17.2 255.255.255.0
> no ip directed-broadcast
> no ip mroute-cache
> no fair-queue
> clockrate 148000
> !
> interface Serial0/1
> bandwidth 128
> no ip address
> no ip directed-broadcast
> encapsulation frame-relay
> logging event subif-link-status
> logging event dlci-status-change
> clockrate 2000000
> no frame-relay inverse-arp
> frame-relay intf-type dce
> !
> interface Serial0/1.24 point-to-point
> ip address 150.50.24.2 255.255.255.0
> no ip directed-broadcast
> frame-relay interface-dlci 104
> !
> interface Serial0/1.256 multipoint
> ip address 150.50.100.2 255.255.255.224
> no ip directed-broadcast
> frame-relay map ip 150.50.100.5 105 broadcast
> frame-relay map ip 150.50.100.6 106 broadcast
> !
> router rip
> redistribute connected metric 3
> network 150.50.0.0
> !
> router igrp 10
> redistribute connected metric 1000 100 1 255 1500
> network 150.50.0.0
> !
> ip classless
> !
>
> R4
>
> interface Loopback0
> ip address 200.0.0.4 255.255.255.255
> no ip directed-broadcast
> !
> interface Ethernet0
> ip address 10.1.1.4 255.255.255.0
> no ip directed-broadcast
> !
> interface Serial0
> ip address 150.50.24.4 255.255.255.0
> no ip directed-broadcast
> encapsulation frame-relay
> no ip mroute-cache
> no fair-queue
> frame-relay map ip 150.50.24.2 401 broadcast
> no frame-relay inverse-arp
> !
> interface Serial1
> no ip address
> no ip directed-broadcast
> shutdown
> !
> interface FR-ATM20
> no ip address
> no ip directed-broadcast
> shutdown
> !
> router igrp 10
> redistribute connected metric 100 1 225 1 1500
> network 150.50.0.0
> distribute-list 1 out Serial0
> !
> access-list 1 permit 10.0.0.0 0.255.255.255
> access-list 1 permit 200.0.0.0 0.0.0.255
>
> Looking at the routing tables, I see:
>
======================================================
> R1#sh ip rou
> .
> .
>
> Gateway of last resort is not set
>
> 200.0.0.0/32 is subnetted, 1 subnets
> C 200.0.0.1 is directly connected, Loopback0
> 150.50.0.0/24 is subnetted, 4 subnets
> C 150.50.200.0 is directly connected,
> Ethernet0
> C 150.50.17.0 is directly connected, Serial0
> C 150.50.18.0 is directly connected,
> Loopback10
> R 150.50.24.0 [120/1] via 150.50.17.2,
> 00:00:27, Serial0
> R1#
>
======================================================
> R2#sh ip rou
> .
> .
>
> Gateway of last resort is not set
>
> 200.0.0.0/24 is variably subnetted, 2 subnets,
> 2 masks
> I 200.0.0.0/24 [100/80625] via 150.50.24.4,
> 00:00:04, Serial0/1.24
>
> C 200.0.0.2/32 is directly connected,
> Loopback0
> I 10.0.0.0/8 [100/80225] via 150.50.24.4,
> 00:00:04, Serial0/1.24
> 150.50.0.0/16 is variably subnetted, 5 subnets,
> 2 masks
> R 150.50.200.0/24 [120/1] via 150.50.17.1,
> 00:00:05, Serial0/0
> C 150.50.17.0/24 is directly connected,
> Serial0/0
> R 150.50.18.0/24 [120/1] via 150.50.17.1,
> 00:00:05, Serial0/0
> C 150.50.24.0/24 is directly connected,
> Serial0/1.24
> C 150.50.100.0/27 is directly connected,
> Serial0/1.256
> R2#
>
======================================================
> R4#sh ip rou
> .
> .
>
> Gateway of last resort is not set
>
> 200.0.0.0/24 is variably subnetted, 2 subnets,
> 2 masks
> I 200.0.0.0/24 [100/8976] via 150.50.24.2,
> 00:01:30, Serial0
> C 200.0.0.4/32 is directly connected,
> Loopback0
> 10.0.0.0/24 is subnetted, 1 subnets
> C 10.1.1.0 is directly connected, Ethernet0
> 150.50.0.0/24 is subnetted, 2 subnets
> I 150.50.17.0 [100/12100] via 150.50.24.2,
> 00:00:19, Serial0
> C 150.50.24.0 is directly connected, Serial0
> R4#
>
======================================================
>
> My question is:
>
=== message truncated ===
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