[c-nsp] OSPF Router ID

[Bruce Pinsky]

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Ian MacKinnon wrote:
> Kurt Bales wrote:
>> Hey Guys,
>>
>> We are migrating our services to a MPLS VPN (on our providers network). We
>> are using OSPF to route between the remote sites and the providers VRF. We
>> can only seem to get the OSPF sessions to establish if we use the same OSPF
>> process ID as our provider, but all the docs I can find suggest that the
>> process ID only has context within the local router, and does not propogate
>> outside of the router?
>>
>> Does anybody have any suggestions as to why this might be? 
>>
> you are right, as far as I can recall, the RFC specs say it is local
> only, but I seem to remember that in a MPLS context Cisco do use it.
> I can't seem to find why at the moment, but
>>From http://www.ciscopress.com/articles/article.asp?p=391649&seqNum=2&rl=1
> NOTE
> 
> If you want all the sites in the VPN to be in the same OSPF autonomous
> system, the process ID configured for the VRF on all PE routers must be
> the same. Alternatively, use the domain-id command to configure a
> consistent domain ID number (by default, the domain ID corresponds to
> the OSPF process ID).


See:

http://www.cisco.com/warp/public/104/9.html#q36

http://www.cisco.com/en/US/products/ps6350/products_command_reference_chapter09186a0080446b1b.html#wp1000027


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bep

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