From: Mike Gutknecht (mike@xxxxxxxxxxxxx)
Date: Thu Jun 14 2001 - 00:04:13 GMT-3
To me, it depends on if you may need to depend on the route that came in the
wrong way for redundancy reasons.
-If you need the redundancy, then use distance.
-If you don't need redundancy, and you really don't want to get the route at
all, use a distribute-list in on the interface.
-If you use a distribute-list out on the protocol or a route map to filter
the redistribution, realize that the router that is doing the redistributing
is still learning a route that originated in one domain FROM the other
domain and could actually insert it in its routing table.
This is well covered in Doyle and takes about 3 readings for it to sink in
:)
-----Original Message-----
From: adiment@uswest.com [mailto:adiment@uswest.com]
Sent: Wednesday, June 13, 2001 6:26 AM
To: ccielab@groupstudy.com
Subject: RE: Route Redistribution/Distribute-list/route-maps
I kind of like the distance command. EIGRP uses it (external distance 170)
as a built in loop avoidance.
-----Original Message-----
From: Luke [mailto:luke.mendoza@home.com]
Sent: Tuesday, June 12, 2001 11:42 PM
To: Ccie (E-mail)
Subject: Route Redistribution/Distribute-list/route-maps
Hello,
In performing route redistribution, say ospf to igrp and igrp to ospf. What
is the best way to prevent route feedbacks, route loops, and other associate
issues.
1. Distribute-lists
2. route-maps
3. Distance command
I had an issue where a router was performing mutual redistribution between
igrp/ospf. Routes that were once learned as ospf now became IGRP routes in
that particular router (routes ospf redistributed to igrp then igrp sends
update back) I later found out that the downstream igrp router with a frame
relay physical interface had split horizon turned off. (I forgot about that
one!)
but to prevent this issue.. which technique is best? I think route-maps
work really well but looking for opinions here...
Luke
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