Thursday, August 16, 2018

Juniper Optimal Route Reflection

Hello,

We're trying to evaluate the Juniper Virtual Route Reflector and make use of the new features that Optimal Route Reflection affords, however as configured by Junipers examples, the router is not adjusting the metric to factor in the IGP cost as expected. Curious if this is something others have seen, or if ORR is not quite there yet in general.

EDIT: since theres going to be that one guy that somehow thinks its configured wrong, here is an example:

group iBGPv4 { type internal; local-address 10.10.172.4; cluster 0.0.0.4; optimal-route-reflection { igp-primary 10.91.14.253; } neighbor 10.91.14.253; } james@rr1> show route 10.91.14.253 inet.0: 573624 destinations, 1615236 routes (573623 active, 0 holddown, 1 hidden) + = Active Route, - = Last Active, * = Both 10.91.14.253/32 *[OSPF/10] 15:15:15, metric 221 > to 10.60.155.235 via em1.0 ## This is another router in the iBGP mesh, separate peer group with ORR settings but same cluster. james@rr1> show route advertising-protocol bgp 10.78.31.254 4.0.0.0/9 Prefix Nexthop MED Lclpref AS path * 4.0.0.0/9 X.X.42.41 50 1299 3356 I 

I would think MED would be 221 or..something thats not 0 :)

-James



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