From: fwells12 (fwells12@xxxxxxxxxxx)
Date: Sat Nov 03 2001 - 11:23:05 GMT-3
Any decent ccie study tome will confirm your findings...
----- Original Message -----
From: "Dario Mussi" <dmussi@lucent.com>
To: <ccielab@groupstudy.com>
Sent: Saturday, November 03, 2001 5:52 AM
Subject: default route from OSPF to IGRP
> Hi guys,
>
> It's seems I'm falling in an old games.
> I took a look in the list archives and I read some docs to but it's not
all
> clear yet.
>
> R1(e0)---(e0)R2(s0)---(s0)R3
> OSPF IGRP
>
> R1 and R2 both run OSPF. R3 runs only IGRP.
> R1 redistribute a default route "ip route 0.0.0.0 0.0.0.0 137.20.20.1"
> where 137.20.20.x is the ethernet network where both R1 and R2 reside.
> IGRP doesn't underestand this route so I thought to configure R2 (which is
> redistributingOSPF into IGRP) with this command "ip default-network
> 137.20.0.0". The default-network declared is an attached net so it takes
> precendence over the
> previous learned default route 0.0.0.0 from R1, but ping to networks not
in
> tables resulted "unroutable" (probably 'cause the Ethernet is /24 and not
> clasfull).
>
> I tried this on R2: ip default-network 137.20.20.0
> This is wrong 'cause this command is for classful net infact it generated
> automatically the following line in R2 conf:
> ip route 137.20.0.0 255.255.0.0 137.20.20.0
>
> I kept this route and I re-typed the command in the right way "ip
> default-network 137.20.0.0"
> This default took precendence again over the 0.0.0.0 but this time
> everything works!!!
> Ping in no more "unroutable" because of the static. Here the routing
table:
> * 137.20.0.0/16 is variably subnetted, 2 subnets, 2 masks
> C 137.20.20.0/24 is directly connected, Ethernet0
> S* 137.20.0.0/16 [1/0] via 137.20.20.0
> 172.168.0.0/16 is variably subnetted, 7 subnets, 2 masks
> I 172.168.40.0/24 [100/8486] via 172.168.200.2, 00:00:22, Serial0.2
> C 172.168.200.0/24 is directly connected, Serial0.2
> O*E2 0.0.0.0/0 [110/1] via 137.20.20.1, 03:09:27, Ethernet0
>
> Now I'm quite happy but I still don't understand what must be right and
> what is defently wrong...
>
> Hope in some feedback.
> Dario
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