From: Matt Smith (matt-n-donna@xxxxxxxxxxxxxx)
Date: Wed Nov 14 2001 - 17:01:11 GMT-3
Look up the rule for classfull protocols on distcontiguous subnets. IGRP
and RIP will not allow them to be injected into the routing table. Since
both Loopbacks share the common classful 10.0.0.0/8 network and the
connecting interface is in a different classfull subnet then the
discontiguous subnet rule will apply. This is a classic scenaio to
demonstrate the issue. Several ways to fix this such as secondary addresses
and a tunnel.
Good Luck
Matt
----- Original Message -----
From: <steven.j.nelson@bt.com>
To: <ccielab@groupstudy.com>
Sent: Wednesday, November 14, 2001 5:33 AM
Subject: IGRP Connected Networks Redistribution
> Guys,
>
> I must be going mad......I've been at this too long.
>
> I have 2 routers R2 and R4 connected by frame relay, I am running IGRP
(AS1)
> on both boxes. I am trying to redistribute a connected network (loop 0)
from
> R4 into IGRP so R2 can see it. I realise of course that R2 will see the
link
> a classful (i.e 10.0.0.0) but I cant even get that.
>
> I think this maybe some kind of bug or the fact the A already has a
> connected network in the 10.0.0.0 range (Albeit subnetted), configs below.
>
> **** Router 2 ****
>
> interface Loopback0
> ip address 10.2.2.2 255.255.255.0
> no ip directed-broadcast
> !
> interface Ethernet0
> ip address 150.50.17.2 255.255.255.0
> no ip directed-broadcast
> !
> interface Serial0
> no ip address
> no ip directed-broadcast
> encapsulation frame-relay
> cdp enable
> !
> interface Serial0.24 point-to-point
> ip address 150.50.24.2 255.255.255.0
> no ip directed-broadcast
> frame-relay interface-dlci 104
> !
> router igrp 1
> passive-interface Ethernet0
> network 150.50.0.0
> !
> ip classless
> !
> line con 0
> password cisco
> login
> transport input none
> line vty 0 4
> password cisco
> login
> !
> end
>
> **** Router 4 ****
>
> !
> interface Loopback0
> ip address 10.4.4.4 255.255.255.255
> no ip directed-broadcast
> !
> interface Ethernet0/0
> no ip address
> no ip directed-broadcast
> no keepalive
> !
> interface Serial0/0
> ip address 150.50.24.4 255.255.255.0
> no ip directed-broadcast
> encapsulation frame-relay
> ip split-horizon
> no ip mroute-cache
> frame-relay map ip 150.50.24.2 401 broadcast
> no frame-relay inverse-arp
> !
> router igrp 1
> redistribute connected metric 56 1000 255 1 1500
> network 150.50.0.0
> !
> ip classless
> !
> line con 0
> password cisco
> login
> transport input none
> line aux 0
> line vty 0 4
> password cisco
> login
> !
> end
>
>
> Steve Nelson
> Customer Engineer
> BT Ignite- National Solutions
> T: +44 (0)1422 338881 M: +44 (0)7811 944172
> e-mail: steven.j.nelson@bt.com
> pp HW A170, PO Box 200(HOM-NZ), London, N18 1ZF
> > British Telecommunications plc
> > Registered office: 81 Newgate Street London EC1A 7AJ
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