I have a router that is running BGP to two different providers... When
I show the bgp entry for two different routes, it shows that one
provider is selected for one route, and the other provider is selected
for the other route, even though they seem to have the same AS path
length from each provider. There isn't any difference as far as I can
tell for MED or local preference settings or anything like that...
The route on the bottom looks normal - its being chosen (I assume)
because the 64.*.*.* has the lower router ID (207.* instead of 208.*).
The first entry is the one that doesn't make sense to me - shouldn't it
also be selecting the 64.* router, by virtue of its lower ID? I see
that there are different values for the "version", but I'm not sure this
would have anything to do with it??
rtr#show ip bgp 64.170.96.0/19
BGP routing table entry for 64.170.96.0/19, version 16127
Paths: (2 available, best #2, table Default-IP-Routing-Table)
Not advertised to any peer
4323 1239 5673
64.132.248.89 from 64.132.248.89 (207.67.76.17)
Origin IGP, localpref 100, valid, external
3561 1239 5673
208.174.151.61 from 208.174.151.61 (208.172.66.20)
Origin IGP, localpref 100, valid, external, best
rtr#show ip bgp 12.3.59.0
BGP routing table entry for 12.3.59.0/24, version 742
Paths: (2 available, best #2, table Default-IP-Routing-Table)
Not advertised to any peer
3561 4513 17304
208.174.151.61 from 208.174.151.61 (208.172.66.20)
Origin IGP, localpref 100, valid, external
4323 4513 17304
64.132.248.89 from 64.132.248.89 (207.67.76.17)
Origin IGP, localpref 100, valid, external, best
ip classless
ip route 0.0.0.0 0.0.0.0 208.174.151.61
ip route 0.0.0.0 0.0.0.0 64.132.248.89
ip as-path access-list 78 permit ^$
-Mike Bray
[EMAIL PROTECTED]
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=42456&t=42456
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