I got one more input regarding this case which is based on observation and would like to share and discuss with you - correct me if i am wrong
This is how cisco implements :-
VRF (e.g. vrf lite)is basically virtual instance of routing table, so if we run ospf in an VRF its basically a differnt instance of OSPF.
so this is an implementation restriction because OSPF needs distuinguished router-id for all the instance running on a same router.
Now take the case of Redback Networks SE800, this is how they implement the Virtual routing concept:-
we can define differnt contexts (Virtual Router contexts) and OSPF process running in the context have nothig to do with OSPF process of other context so they can have same router-id.
Based on this observation can we say that OSPF has defined guidelines about the router-d and cisco is implementing its VRF concept as Virtual routing instance rather complete virtual router so have to be different router-id for each instance ..
ospf also allows you to configure the RID within the VRF context. But an implementation choice has been made not to allow the same RID to exist in different VRFs, just to avoid any issues if LSA are inadvertently being leaked from one VRF to the other.
Harold Ritter Sr. Technical Leader CCIE 4168 (R&S, SP) firstname.lastname@example.org México móvil: +52 1 55 8312 4915 Cisco México Paseo de la Reforma 222 Piso 19 Cuauhtémoc, Juárez Ciudad de México, 06600 México
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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