Hello,
Making some BGP labs, I found this BGP decision to select a best route to 10.10.10.10:
R8#sh ip bgp vpnv4 vrf call 10.10.10.10
BGP routing table entry for 1:100:10.10.10.10/32, version 33
Paths: (3 available, best #2, table call)
Advertised to non peer-group peers:
5.5.5.5 6.6.6.6
65400
3.3.3.3 (metric 3) from 5.5.5.5 (5.5.5.5)
Origin IGP, metric 10, localpref 100, valid, internal
Extended Community: RT:1:100 RT:2:100
Originator: 3.3.3.3, Cluster list: 5.5.5.5
65401
10.0.89.9 from 10.0.89.9 (9.9.9.9)
Origin IGP, metric 100, localpref 100, valid, external, best
Extended Community: RT:1:100
65400
3.3.3.3 (metric 3) from 6.6.6.6 (6.6.6.6)
Origin IGP, metric 10, localpref 100, valid, internal
Extended Community: RT:1:100 RT:2:100
Originator: 3.3.3.3, Cluster list: 6.6.6.6
I hoped that changing metric to 100 from 10.0.89.9, the router will prefer the other routes but not. I have to change local preference to do that. From the above output, I would like to know which atrubute is using BGP to select the route ( I think 3. locally originated, but this router is learning the prefix via eBGP). The weight has not been modified.
R8#sh ip bgp vpnv4 vrf call
BGP table version is 40, local router ID is 8.8.8.8
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 1:100 (default for vrf call)
*>i1.1.1.1/32 2.2.2.2 0 100 0 65400 i
* i 2.2.2.2 0 100 0 65400 i
* i4.4.4.4/32 3.3.3.3 0 100 0 65400 i
*>i 3.3.3.3 0 100 0 65400 i
*> 9.9.9.9/32 10.0.89.9 0 0 65401 i
*>i10.0.14.0/24 3.3.3.3 0 100 0 65400 i
* i 3.3.3.3 0 100 0 65400 i
* i10.10.10.10/32 3.3.3.3 0 100 0 65400 i
*> 10.0.89.9 100 0 65401 i
* i 3.3.3.3 0 100 0 65400 i
Thanks.
