Hi, In BGP bestpath selection, more important things being equal, the choice is supposed to be made according to the IGP metric of the nexthop. Somehow that is working on my Ciscos, but not on my Junipers. On the routes to the endpoints, Metric2 is equal to 1 on all the junipers and the route I want is not chosen because it is "Not Best in its group - Router ID".
I expect the Metric2 to be equal to the IGP cost, not "1". Since it is working on the Ciscos, I suppose there's something wrong with my Juniper configs, could someone please tell me what It might be? Details: My network looks a lot like http://www.juniper.net/techpubs/software/nog/nog-baseline/html/verify-bgp9.html, two CPEs in one private AS, each one connected to a separate PE, and other provider routers connected to the PEs. The difference with my setup is that in my case the CPEs announce identical MEDs and I want traffic to go horizontally as much as possible, so as to maximize the use of the PE-CPE connections. The Junipers are the rightmost R3 and R6 routers not connected to the CPEs, while all others, PE and CPE, are Ciscos (and there are other Cisco routers connected the same as the Junipers choosing the routes the way I expect and want). For each eligible path there are three IP's shown which I suppose could be used for the IGP cost: Source (that's the loopback of the PE) Next hop (that's the IP of the PE on the interface between the PE and the Juniper) Protocol next hop (that's the IP of the CPE on the CPE-PE interface, it's known through OSPF because the PE redistributes connected, but I could change that if there are reasons other than OSPF database size and OSPF LSA recalculation due to flapping, none of which worry me). When I do a show route on the six IPs (three IPs per eligible path), the route and the metrics shown are every single time the ones I expect and want. The Next Hops are known by Direct/0, but I don't see how it could not be so. The Sources are known by OSPF, metric 10 for the route I want, metric 40 for the other one (they are also announced by BGP with metric=0 and metric2 =1 . . .). The Protocol Next-Hops are known by OSPF, metric 29 for the route I want, metric 40 (??) for the other one (they are also announced by BGP with metric=0 and metric2 =1 . . .). But I still don't get the route I want. If useful I'll post configs and output. -- Nathan _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
