[nsp] how to fool the SPF in OSPF?

From: jlewis@lewis.org
Date: Mon Jun 11 2001 - 15:45:48 EDT


Given a network such as:

-----------------------------------
| routerA------T3------routerC |
|___ | _________________ | __| area 0
   | | | | | |
   | T1s | | T3 |
   | | / | | |
    \ | / /-------------\ \ | /
    routerB-----100bt------routerD
           \-------------/
                area 1

how do I get around the T1's connecting A and B being the shortest path
and get B to send traffic to A via D unless one of the T3's above is down?
I can't just use static routes on B, because it won't know if a T3 is
down. I've tried playing with "ip ospf cost" on the T1's but B still
prefers them.

-- 
----------------------------------------------------------------------
 Jon Lewis *jlewis@lewis.org*|  I route
 System Administrator        |  therefore you are
 Atlantic Net                |
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________



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