Re: Newbe question - Relevance of OSPF

Just a small correction - process IDs on CE routers are not relevant.
Process IDs on PE routers are, as they will be used by default to
generate OSPF domain ID.

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Marko Milivojevic - CCIE #18427
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On Tue, May 3, 2011 at 15:14, Paul Borghese <pborghese_at_gmail.com> wrote:
> Jonathan,
>
> Welcome to the list.
>
> I believe you are referring to the OSPF process ID on a CE router. B If the
> OSPF process IDs are different your routes may be injected back into OSPF
> (from the MPLS network) as external routes instead of inter-area routes.
>
> There is an ok writeup B at:
>
> https://learningnetwork.cisco.com/docs/DOC-8648
>
> By the way when the author says "unique" he means "the same" ?!?!?!
>
> Take care,
>
> Paul Borghese
>
> P.S. Try to avoid the same Router ID ... bad things may happen :-).
>
>
>
> On Tue, May 3, 2011 at 10:40 AM, Jonathan Smitthers <
> jsmitthers2011_at_gmail.com> wrote:
>
>> My first post to the list and I screw it up!!!
>>
>> Yes I wanted to asked about the process ID, not router ID. B See what
>> happens
>> when I don't have my coffee.
>>
>> /facepalm
>>
>> Do the process IDs need to be the same on an MPLS link?
>>
>> Thanks for the replies,
>>
>> Jonathan
>>
>> On Tue, May 3, 2011 at 10:35 AM, Michael Kiefer <mjkiefer_at_gmail.com>
>> wrote:
>>
>> > Jonathan,
>> >
>> > It's never acceptable to have duplicate router-ids. It leads to database
>> > problems, flood wars, and other nastiness. Process ids on the hand are
>> > always locally significant.
>> >
>> >
>> >
>> > On Tue, May 3, 2011 at 9:33 AM, Jonathan Smitthers <
>> > jsmitthers2011_at_gmail.com> wrote:
>> >
>> >> Hi,
>> >>
>> >> I am a new member so please excuse the question if it is too easy or
>> >> already
>> >> been answered 100's of times.
>> >>
>> >> Normally the OSPF router id is only locally significant. B But I seem to
>> >> recall reading that the router ID's must match through an MPLS
>> connection.
>> >> B Why? B That makes no sense at all! B Is the router ID transmitted through
>> >> MPLS?
>> >>
>> >> I appreciate the help and look forward to studying with all of you.
>> B Today
>> >> is day 1 of a long journey!
>> >>
>> >> Jonathan Smitthers
>
>
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