RE: BGP Best Path Selection

From: Joseph L. Brunner <joe_at_affirmedsystems.com>
Date: Thu, 4 Jun 2009 02:52:24 -0400

HERE IS AGAIN YURI

Nobody, Next hop if unreachable, don't consider
Wants, Weight Largest preferred
Perot, Preference highest preferred
Running, Route originated by BGP on this router
Again, AS-Path, Shortest length is best
Only, Origin, where I > E > ?
Modern, Med (metric) prefer the Lowest MED, amongst paths. Know the med commands too and how they work!!!
Economic, External over internal. This often leads to EBGP routes becoming the best route
Conservatives, Closest IGP neighbor, where closest would have the lowest routing metric (interesting one here be careful!!!)
Open, Oldest route (promotes stability :)
In, Lowest peer ID
Iowa, Lowest router id (obviously this would probably imply two peering sessions to the same neighbor somewhere)

-Joe

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Cisco Fanatic
Sent: Wednesday, June 03, 2009 3:59 PM
To: ccielab_at_groupstudy.com
Subject: BGP Best Path Selection

All,

Just was wondering if someone has a slang to remember BGP Best Path Selection
process?

-Yuri
Received on Thu Jun 04 2009 - 02:52:24 ART

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