Hi Sandy,

This is the rule of the game for OSPF path selection and cannot be changed:

Section 11 of RFC 2328,  the order of preference for OSPF routes is:
 
   
         intra-area routes, O 

 
         interarea routes, O IA 

 
         external routes type 1, O E1 

 
         external routes type 2, O E2 

 
  I'm assuming you are running a single OSPF process


Date: Thu, 13 Aug 2009 22:27:21 -0700
From: [email protected]
Subject: OSPF Route selection
To: [email protected]
CC: [email protected]





Hello All,
 
I am new to this group, I have a two question regarding OSPF route selection
 
Q. 1
 
I have three routes for single destination, which will be prefered and why ?
 
1) OSPF NSSA Type 1, Cost 107, no-P bit set
2) External Type 1, Cost 279, E-bit Set
3) NSSA Type 2, Cost 24, P-bit set.
 
 
Q. 2 I have two routes for sintge destination, which will be prefered and why ?
 
1) NSSA Type 1 - P-bit Set
2) Ext Type 1, - E-bit Set
 
Request all of you to please let me know the correct answer and reason for that 
answer as  having lots of confusion overe here.


 

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