From: Piotr (usaccie@gmail.com)
Date: Mon Nov 03 2008 - 02:04:12 ARST
BGP path manipulation
BGP path manipulation
Why laugh at me?
*Method* *Direction Applied* *Direction Affected* *Best Metric* Weight
Inbound Outbound Highest Local Preference Inbound Outbound Highest AS Path
Outbound Inbound Shortest MED (metric) Outbound Inbound Lowest
On Fri, Oct 31, 2008 at 2:14 PM, groupstudy email <groupstudy@gmail.com>wrote:
> Hey Guys,
>
> Can anyone explain why the best path is the best path. As I understand it,
> ebgp is preferred over ibgp (AD of 20 for ebgp versus 200 for ibgp).
>
> I have configured a route map to prepend ASs (AS-path prepend 65218 65218
> 65218) on router1 and applied it inbound to the ebgp neighbor, but still
> this path is not preferred even though the AD of 20.
>
> There is no other config that would direct traffic to the internal
> neighbor.
>
> router1(config)#do sh ip bgp 10.70.0.0
> BGP routing table entry for 10.70.0.0/23, version 63710
> Paths: (2 available, best #1, table Default-IP-Routing-Table)
> Not advertised to any peer
> 65501 65000 65000 50002
> 10.70.128.65 from 10.70.128.65 (10.70.97.14)
> Origin incomplete, metric 0, localpref 100, valid, internal, best
> 65218 65218 65218 65218 12641 65006 65006 65006 50002
> 10.70.128.35 from 10.70.128.35 (213.15.219.7)
> Origin incomplete, localpref 100, valid, external
> router1(config)#
>
>
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