FLSM has longer mask than VLSM Probl.

From: hong tony (aamercado31@xxxxxxxxx)
Date: Sun Apr 21 2002 - 16:06:33 GMT-3


   
HI

I search the archives and can't find an answer for
this one.

\lo0
r8----r6-----r3
/lo1

r8/r6 is IGRP with r6 as the redistributing router for
the OSPF on r6/r13

r8 ip address:
lo0 = 172.16.80.1/25
lo1 = 172.16.80.129/25
s0= 172.16.86.8/24

r6 ip address:
s0 = 172.16.86.6/24
s1 = 172.16.100.6/27

r3 ip address:
s1 = 172.16.100.3/27

My question is - How can I can the 172.16.80.0 network
into r6 routing table?

If I put "ip route 172.16.80.0 255.255.255.0 null0"
the route would propagate to r6/r3. However, obviously
I do not want to do statics...so here were my
alternative attempts.

1. default-network - Can't do it cuz of the classful
nature of this command which would propagate a static
route into r8.

2. Summarizing - Nope cuz the IGRP (FLSM) has a longer
mask than OSPF (VLSM)

3. secondary address - Because of the 172.16.80.x/25
mask is using up all the subnetworks for 80.x, I don't
have any other address to use for secondary

4. tunnelling - same problem as #3

5. policy routing - I can't see this as applicable

Is this possible or am I stuck to the null 0 option.

Thanks



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