From: James (james@towardex.com)
Date: Thu Jul 15 2004 - 11:25:52 GMT-3
> In this example, the internal route is selected. After clear ip bgp, the external route is selected.It seems I am missing some point here. My knwonledge of it is:
Are you using deterministic-med or always-compare-med?
-J
>
> is it reachable?
> highest weight
> highest local preference
> locally originated
> shortest path
> lowest origin
> lowest metric
> external over internal
> closest IGp
> lowest router ID
>
> Which leads to choose the external route.
>
> The example is at http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122tcr/122tip2r/bgp_r/p2ftbgp1.htm#wp1225926
>
> Router# show ip bgp 10.100.0.0
>
> BGP routing table entry for 10.100.0.0/16, version 2
>
> Paths: (3 available, best #3, advertised over EBGP)
>
> 109 192.168.43.10 from 192.168.43.10 (192.168.43.1)
>
> Origin IGP, metric 0, localpref 100, valid, internal
>
> 2051
>
> 192.168.43.3 from 192.168.43.3 (10.4.1.1)
>
> Origin IGP, metric 30, valid, external
>
> 2051
>
> 192.168.43.22 from 192.168.43.22 (192.168.43.2)
>
> Origin IGP, metric 20, localpref 100, valid, internal, best
>
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-- James Jun TowardEX Technologies, Inc. Technical Lead Network Design, Consulting, IT Outsourcing james@towardex.com Boston-based Colocation & Bandwidth Services cell: 1(978)-394-2867 web: http://www.towardex.com , noc: www.twdx.net
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