[c-nsp] OSPF Router ID

Metz, E.T. (Eduard) Eduard.Metz at tno.nl
Thu Mar 29 09:19:37 EST 2007


AFAIK the OSPF process ID or domain ID are relevant only in the provider
(MPLS VPN) domain (PE-PE), and even then only for the BGP-OSPF
redistribution. They should not interfere with OSPF adjacencies on CE-PE
links. Do you have any information on the state in which the neighbor
setup gets stuck, or some debug traces of this process?

/Eduard

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Ian MacKinnon
> Sent: donderdag 29 maart 2007 10:08
> To: Kurt Bales
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] OSPF Router ID
> 
> 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).
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