RE: BGP question

From: William Dicks (wdicks@xxxxxxxxxxxxxxxxxx)
Date: Thu Aug 17 2000 - 12:23:59 GMT-3


   
Normally, MED is only compared between routes received from one AS.

For example,if you are AS 1400 and you have 3 WAN connections. 2 of those
are to UUNET (AS701) and one is to AS1300. If you receive the route for say
209.224.0.0 from all three connections, BGP will only use MED to compare the
2 routes from UUNET, but not from AS1300. That command will have the router
compare MEDs from different AS's, in this case AS701 and AS1300.

Bill Dicks
CCIE # 6081

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Matt Lachberg 3
Sent: Wednesday, August 16, 2000 11:31 AM
To: ccielab@groupstudy.com
Subject: BGP question

Could someone explain this command?

Configure the Router to Use the MED to Choose a Path in a Confederation
To configure the router to use the MED to select the best path from among
paths advertised by a single sub-AS within a confederation, use the
following command in router configuration mode: Command Purpose

bgp deterministic med

 Configures the router to consider the MED in choosing the best path from
among paths advertised by a single sub-AS within the confederation.

http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/np1_c
/1cprt1/1cbgp.htm#27727

Matthew Lachberg, CCNP, CCDP, MCSE



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