[j-nsp] BGP Confederation Route Selection?

From: HHH (jnciecert@yahoo.com)
Date: Mon Jul 08 2002 - 13:12:26 EDT


Im playing around with some confederation test
topologies, and I have the current set up of sub-as.

65000 , 65100, 65200

they all peer with each other. Im seeing a route 10/9
in Sub-AS 65100 coming from both sub-as 65000, and
65200 peers. It is picking the route through as
(65000 65200) over (65200). The reason shows router
id? How is BGP confederation routes selected vs.
regular BGP routes. Is the SUB_AS path considered in
JunOS? and what about IGP metric to the next hop. It
is closer through 65200 directly in my topology. Can
anyone shed any light on this?
thnx

BGP_Sync_Any dest 10.0.0.0/9 MED 10

        *BGP Preference: 170/-151
                Source: X.Y.15.2
                Nexthop: X.Y.60.129 via fe-0/1/0.0,
selected
                label-switched-path ToM5-T1
                State: <Active Int Ext>
                Local AS: 65100 Peer AS: 65100
                Age: 4:13 Metric2: 10
                Task: BGP_65100.X.Y.11.2+179
                Announcement bits (3): 0-KRT
4-BGP.0.0.0.0+179 5-BGP_Sync_Any
                AS path: (65000 65200) 1111 I
                BGP next hop: X.Y.90.4
                Localpref: 100
                Router ID: 10.100.15.2

         BGP Preference: 170/-151
                Source: X.Y.90.4
                Nexthop: X.Y.60.73 via t3-0/2/0.0,
selected
                label-switched-path ToM5-T1
                State: <NotBest Int Ext>
                Inactive reason: Router ID
                Local AS: 65100 Peer AS: 65200
                Age: 4:09 Metric2: 10
                Task: BGP_65200.10.100.11.4+179
                AS path: (65200) 1111 I
                BGP next hop: X.Y.90.4
                Localpref: 100
                Router ID: X.Y.90.4

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