From: Geatti (geatti@xxxxxxxx)
Date: Wed Sep 13 2000 - 13:32:25 GMT-3
Just the last few days of cramming here until my lab.
I have a question about OSPF and Classless routing protocols such as IGRP.
Consider the scenario below.
---------------------\ /----------------
\ /
\ /
10.10.20.128/25 \ / 10.10.30.0/24
| )( |
|---------R1----------R2-----------R3--------|
| )( |
OSPF AREA 0 / \ IGRP 100
/ \
/ \
---------------------/ \-----------------
3 routers, R1, R2 and R3. R2 is performing mutual redistribution between
IGRP and OSPF.
We are using different masks, IGRP is a /24 and OSPF a /25.
My question is this, is there any way of getting routes from OSPF into IGRP?
As I understand,
1. We must get the mask down to /24 for IGRP to even look at it as it won't
cope with VLSM.
2. Normally you could summarize into area 0 with the area range command but
as we are in area 0 with this route we are out of luck there.
3. The only way I know of doing this is
a. Use the ip default-network and point it to a glassful net other than
your own. (still a default route)
b. Create a static route on R2 for 10.10.20.0/24 and redistribute that
static into IGRP. (A static route)
Is there any way other than what I have mentioned above of doing this? I
would really appreciate any cool walk arounds for this situation. The
easiest thing to do would be to change the area of this route so we could
summarize it down to /24, however I am looking for a solution that doesn't
involve changing the area. I'm not sure there is a solution to this
situation but there's a lot of smart people on this board so who knows.
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