[f-nsp] BGP best path on a XMR

[Morten Isaksen]

Hi!

I have two XMR's that that each has a BGP connection to an upstream
provider and i IBGP link between them. I am trying to force traffic to
some prefixes via one of the upstreams and have made a route map that
set the local pref i bit higher for these prefixes, but the XMR seems
to ignore this. Or maybe I have misunderstood the best path algorithm.

SSH at BGP-2>sh ip bgp route detail 194.255.106.0
Number of BGP Routes matching display condition : 2
Status A:AGGREGATE B:BEST b:NOT-INSTALLED-BEST C:CONFED_EBGP D:DAMPED
       E:EBGP H:HISTORY I:IBGP L:LOCAL M:MULTIPATH m:NOT-INSTALLED-MULTIPATH
       S:SUPPRESSED F:FILTERED s:STALE
1       Prefix: 194.255.0.0/16,  Status: BE,  Age: 2d22h10m20s
         NEXT_HOP: 217.74.212.65,  Learned from Peer: 217.74.212.65 (29542)
          LOCAL_PREF: 100,  MED: none,  ORIGIN: igp,  Weight: 0
           AS_PATH: 29542 9167 3308
            COMMUNITIES: 9167:50203 29542:301 29542:321 43027:310
            Adj_RIB_out count: 1,  Admin distance 20
2       Prefix: 194.255.0.0/16,  Status: I,  Age: 0h15m39s
         NEXT_HOP: 194.19.218.157,  Learned from Peer: 77.75.166.253 (43027)
          LOCAL_PREF: 110,  MED: none,  ORIGIN: igp,  Weight: 0
           AS_PATH: 3308
            COMMUNITIES: 43027:300
       Last update to IP routing table: 2d22h10m20s, 1 path(s) installed:
       Route is advertised to 1 peers:
        77.75.166.253(43027)


In my world route 2 should be preferred since it has the highest local
pref, but the XMR prefers route 1.

Can somebody explain why? And how do I make it choose route 2 as the best path?

-- 
Morten Isaksen
http://www.misak.dk/blog/