From: gladston@br.ibm.com
Date: Thu Jul 15 2004 - 11:06:56 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:
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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