Re: BGP Best Path Selection

*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)*

It should be
*Open, Oldest route (promotes stability :)
In, Lowest router id (obviously this would probably imply two peering
sessions to the same neighbor somewhere)
Iowa, Lowest peer ID
*
cisco Doc cd...
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094431.shtml

   1.

   Prefer the route that comes from the BGP router with the lowest router
   ID.

   The router ID is the highest IP address on the router, with preference
   given to loopback addresses. Also, you can use the *bgp
router-id*command to manually set the router ID.

   *Note: *If a path contains route reflector (RR) attributes, the
   originator ID is substituted for the router ID in the path selection
   process.
    2.

   If the originator or router ID is the same for multiple paths, prefer the
   path with the minimum cluster list length.

   This is only present in BGP RR environments. It allows clients to peer
   with RRs or clients in other clusters. In this scenario, the client must be
   aware of the RR-specific BGP attribute.
    3.

   Prefer the path that comes from the lowest neighbor address.

   This address is the IP address that is used in the BGP
*neighbor*configuration. The address corresponds to the remote peer
that is used in the TCP connection with the local router.

Thanking You

Yours Sincerely

Divin Mathew John
divinjohn_at_gmail.com
divin_at_dide3d.com
http://www.dide3d.com
+91 9945430983
+91 9846697191
+974 5008916
PGP PUBLIC KEY BLOCK @ http://www.dide3d.com/divin_Public_PGP_key.txt
Sent from Bangalore, KA, India

On Thu, Jun 4, 2009 at 1:48 PM, Jared Scrivener <jscrivener_at_ipexpert.com>wrote:

> Nice. That's the best one I've seen yet, Joe. I think I'm about to borrow
> it
> for my classes.
>
> Cheers,
>
> Jared Scrivener CCIE3 #16983 (R&S, Security, SP), CISSP
> Sr. Technical Instructor - IPexpert, Inc.
> URL: http://www.IPexpert.com
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> Mailto: jscrivener_at_ipexpert.com
>
>
>
> On 6/4/09 2:52 AM, "Joseph L. Brunner" <joe_at_affirmedsystems.com> wrote:
>
> > 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
> >
> > _________________________________________________________________
> > Windows Live : Keep your life in sync.
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> >
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Received on Thu Jun 04 2009 - 14:55:00 ART