OSPF Filtering/ Policying etc

From: damien (damien@xxxxxxxxxxx)
Date: Sun Aug 06 2000 - 10:52:04 GMT-3


   
   Can you use Policy Routing to filter OSPF Routes based on Tags or just
   Destintation IP .........
   
   I have tried to filter with Policy Routing and had no joy? The only
   thing I can get to work is distribute lists....? Even using Distribute
   lists. For example, if I filter on inbound Routes on an Interface, the
   Route that I deny for example is not entered into the local Routing
   Table as I would expect, yet the LSA is still in the database. The
   LSA for the denied Route is still forwarded to all other Neighbors !
   Therefore the Route appears in there tables.
   
   What I was trying to do is redistribute ASBR Summary Externals into
   the OSPF Domain at some transit point. I wanted to filter based on Tag
   or Destintation IP. If I filter at the redistribution point, it will
   probably work as the deny statements are interpreted differently for
   policy and redistribution....but this is not what I looking to
   acheive........
   
   I have tried using distribute lists for the same purpose on the
   out going interface using the following "distribute-list 5 out ospf 1"
   This appears to have no affect at all.
   
   The Goal of my Labs is to define all the methods of policying/
   filtering and redistribution methods I can use with OSPF.
   
   Any advice greatly appreciated..



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