From: Brian Best (bbest@xxxxxxxxxxxxx)
Date: Sun Jan 09 2000 - 12:37:55 GMT-3
Darrel,
As I am sure you are aware, the problem lies in the fact that the routes to
your loopback interfaces not get redistributed to R3 due to the classful
nature of IGRP. You will see all the /24 routes because all the interfaces
in your IGRP routing processes possess a /24 mask. Your problem is
reachability from R3 w/o the use of static routes.
I would say that your best bet is to create another loopback on R1 and
include it in the OSPF routing process. Then on R2 use the ip
default-network command for the route you just added. Make sure that you
use the classful address with this command - don't include a subnet or it
will not advertise properly.
You should then see the route appear as a candidate default on R2 and and
this will be propogated to R3. Also make sure that ip classless is enabled
on R3.
Liberal use of debug ip packet is great to see what is happening here.
Regards,
Brian Best
> -----Original Message-----
> From: Darrel Hinshaw [mailto:dhinshaw@istrength.net]
> Sent: Thursday, January 06, 2000 9:30 PM
> To: ccielab@groupstudy.com
> Subject: VLSM ---> FLSM or OSPF --> IGRP
>
>
> All:
>
>
> First I'm sorry for making this so long.
>
>
>
> Great deal of difficulty here. The usual parameter of NO
> static routes of
> any kind are in effect.
>
>
> R1-->S0------(OSPF 0)------S0<--R2-->E0------(IGRP)------E0<--R3-->E1
>
> Interface Addresses:
> R1/S0: 150.100.4.5/24 OSPF Area 0
> R1/L0: 150.100.5.5/30 OSPF Area 0
> R2/S0: 150.100.4.3/24 OSPF Area 0
> R2/L0: 150.100.5.9/30 OSPF Area 0
> R2/E0: 150.100.128.1/24 IGRP
> R3/E0: 150.100.128.2/24 IGRP
> R3/E1: 150.100.129.1/24 IGRP
>
> Problem: How do I distribute OSPF into IGRP on R2? I have
> configured but I
> am unable to get any 150.100.5.x addresses to show up in R3's
> routing table.
> Below are the relevant Configs.
>
> Router 1:
>
> router ospf 5
> network 150.100.4.0 0.0.0.255 area 0
> network 150.100.5.5 0.0.0.0 area 0
> network 150.100.14.0 0.0.0.255 area 3
> area 0 authentication message-digest
> area 3 range 150.100.14.0 255.255.255.0
> area 3 virtual-link 150.100.3.1
>
> Router 2:
>
> router ospf 5
> summary-address 150.100.5.0 255.255.255.0
> redistribute igrp 5 subnets route-map igrpn2ospf
> network 150.100.4.0 0.0.0.255 area 0
> network 150.100.5.9 0.0.0.0 area 0
> area 0 authentication message-digest
> area 0 range 150.100.4.0 255.255.255.0
> area 0 range 150.100.5.0 255.255.255.0
>
> router igrp 5
> redistribute ospf 5 metric 10000 10 255 1 1500 route-map ospfn2igrp
> passive-interface Loopback0
> passive-interface Serial0
> passive-interface Serial0.110
> network 150.100.0.0
> network 0.0.0.0
>
> ip classless
>
> access-list 1 permit 150.100.128.0 0.0.127.255
> access-list 2 deny 150.100.128.0 0.0.127.255
> access-list 2 permit any
> !
> route-map igrpn2ospf permit 10
> match ip address 1
> !
> route-map ospfn2igrp permit 10
> match ip address 2
>
> Router 3:
>
> router igrp 5
> network 150.100.0.0
>
> ip classless
>
>
>
> ANY help would be appreciated.
>
>
> Regards,
>
> Darrel Hinshaw
>
>
>
> PS If you have actually read this far . . . THANKS.
>
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