RE: [nsp] OSPF not distributing 1 interface

From: Bryan Ginman (BGinman@iSolve.com)
Date: Tue May 29 2001 - 10:05:37 EDT


Exactly if you inject them as a type 1 you will increment hop count Type 2's
do not. Type 2's are default though. The point of the note is that redist
connected to get them into your IGP is not the best way to do it.

Bryan Ginman
iSolve.com
Vice-President, Network Services
bginman@iSolve.com
203-388-3566

-----Original Message-----
From: Dmitri Kalintsev [mailto:dek@hades.uz]
Sent: Monday, May 28, 2001 7:32 PM
To: 'cisco-nsp@puck.nether.net '
Subject: Re: [nsp] OSPF not distributing 1 interface

On Fri, May 25, 2001 at 09:51:40PM -0400, Bryan Ginman wrote:
> The reason that this is not preferable is that it injects it as a External
> type 2 route with a much higher AD and does not increase its metric
through
> the area. This can cause problems in large networks if you are not careful
> and definitely is not as clean. In and of itself this is not necessarily
> "evil", however in large networks with multiple redundant paths, etc this
is
> not "best practice" the best practice is to run the IGP on all interfaces
in
> the passive state that you do not want to actively participate in IGP
> conversations.

Who said they must be Type2?

Router(config-router)#red stat subn metric-type ?
  1 Set OSPF External Type 1 metrics
  2 Set OSPF External Type 2 metrics

(Same applies to "connected")

We actively using it in few networks, though carefuly done through the
route-maps. Works fine. As well, it helps keeping unnecessary routing
information out of Stub areas.

SY,

-- 
 CCNP, CCDP (R&S)                          Dmitri E. Kalintsev
 CDPlayer@irc               Network Architect @ connect.com.au
 dek @ connect.com.au     phone: +61 39 674 3913 fax: 251 3666
 http://-UNAVAIL-         UIN:7150410    cell: +61 41 335 1634



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