From: Schulz, Dave (DSchulz@dpsciences.com)
Date: Sun Dec 04 2005 - 13:38:39 GMT-3
Serge -
The rule of the thumb (I think, at least one of them) on mutual distribution
...is not redistribute routes back into the area that they originally came
from (causing a loop). IMHO, the best way to do this is through tags, though
you can use specific route....but these are little less
administration-friendly, since if the routes change, so do your
access-lists/route-maps. Also, watch out for your metrics (not as big in ospf
as in eigrp). Here is an example that I have....hope this helps....(mutual
redistribution from ospf to eigrp). Also, I am doing this for memory, so it
may look different on your router. Please correct me if I missed something.
------------------------
router ospf 1
redistribute eigrp 100 route-map E2O subnets
router eigrp 100
redistribute ospf 1 route-map O2E metric 100000 1000 255 1 1500
!
!
route-map E2O deny 10
match tag 110 (I use the tag that has the same admin distance #)
!
route-map E2O permit 20
match tag 90
!
route-map O2E deny 10
match tag 90
!
route-map O2E permit 20
match tag 110
!
Note: I like to use the tag that has the same admin distance where the route
originally came from, just to keep it straight....but this your choice.
-----Original Message-----
From: nobody@groupstudy.com
To: ccielab@groupstudy.com
Sent: 12/4/2005 9:23 AM
Subject: Controling mutual redistribution loops
Hi all,
I'm always afraid when it comes to spoting mutual redistribution loops
!!
What are the rules of tumbs for visualising the potential loops ?
What is the logic behind this ?
Does packet tagging always block the redistribution loops ?
what is the implementation logic ?
Thx for your answers !
Serge R. N'GBESSO
serge.ngbesso@bnpparibas.com
Security Consultant
CCDA, CCSP, CCIE:Security,
Certified Etichal Hacker.
www.1000club.com/club/japon/
---------------------------------
Appel audio GRATUIT partout dans le monde avec le nouveau Yahoo!
Messenger
Tilichargez le ici !
This archive was generated by hypermail 2.1.4 : Mon Jan 09 2006 - 07:07:50 GMT-3