Subject: RE: distance command in eigrp
Like someone else said.... Use tags, it's way easier once you understand
them.... Here's an example.

router ospf 1
 redistribute eigrp 25 subnets route-map EIGRP_OSPF

route-map EIGRP_OSPF deny 10
 match tag 25
route-map EIGRP_OSPF permit 20
 set tag 26

router eigrp 25
 redistribute ospf 1 metric 128 2000 255 1 1500 route-map OSPF_EIGRP

route-map OSPF_EIGRP deny 10
 match tag 26
route-map OSPF_EIGRP permit 20
 set tag 25

Basically it does the following, when redistributing EIGRP into OSPF set
a tag of 26 to every route, but first don't receive any routes tagged
with 25 (which were tagged by the redistribuition process of EIGRP in
the other router -- avoid loop --).

The same but opposite is done when redistributing OSPG in EIGRP.

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---------- Forwarded message ----------
From: "Schulz, Dave" <DSchulz@dpsciences.com>
To: "kevin gannon " <kevin@gannons.net>, <nobody@groupstudy.com>, "Cisco Nuts " <cisconuts@hotmail.com>
Date: Sat, 5 Nov 2005 12:40:22 -0500
Subject: RE: Rip <--->Ospf Redistribution - using distribute-lists?
This is a great subject, and one that I have been wrestling with for awhile.
I have used the ACLs for the distribution, but Kevin is right...you have to
maintain the ACLs.  And, in a dynamic environment, this may take a lot more
admin than one would care to admit.  I have found that easiest way to do the
redistribution is by using tags.  I try to keep the same tag number as the
administrative distance to keep things straight.  So, if I am redistributing
from OSPF to EIGRP....I use 110 as the tag and 90 in the reverse direction.
This seems to work well and is very easy to implement and keep things
straight.

The one thing that I have learned with the redistribution is applying the
metrics.  For EIGRP, you must apply the metrics either as a default in the
routing process or on the redistribute command line.  You cannot solely do
this within the metric.  Here is an example of a route-map for redistribution
that I have used:

router eigrp 1
 redistribute ospf 1 route-map Ospf2Eigrp metric 100000 1 255 1 1500
!
router ospf 1
 redistribute eigrp 1 route-map Eigrp2Ospf metric 10 metric-type 1
!
route-map Eigrp2Ospf deny 10
 match tag 110
!
route-map Eigrp2Ospf permit 20
 set tag 90
!
route-map Ospf2Eigrp deny 10
 match tag 90
!
route-map Ospf2Eigrp permit 20
 set tag 110


I am interested in any other great ways to accomplish this.  You can't know
enough of the ways to do things.

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