Re: OSPF as Protocol between between CE and PE in MPLS

Thanks bryan , Got it :)

On 7/17/09, Bryan Bartik <bbartik_at_ipexpert.com> wrote:
>
> Jack,
>
> If the process numbers match on the PE's the route will be O IA by default.
> If the process numbers do not match, it will be O E2.
> If the process numbers do not match, set the domain-id on each PE to match
> and it will go back to O IA.
> Use the sham-link, to make the route strictly O (intra-area).
>
> -hth
>
> On Thu, Jul 16, 2009 at 9:36 AM, jack daniels <jckdaniels12_at_gmail.com>wrote:
>
>> Hi ,
>>
>> Please help me in understanding What is odpf domain id.
>> What I understand now is 1) to maintaince INTERA AREA route type we use
>> SHAM
>> LINK
>> - is it right ?
>>
>> and for maintaining inter area routes we have MPBGP extended comunites
>> carry
>> OSPF route type , metric and OPF DOMAIN ID . Do we need to configure these
>> copy from ospf to MPBGP? if so how .... as by default redistruion to OSPF
>> from MPBGP orignates LSA 5.
>>
>> Regards
>> J.Daniels
>>
>>
>> On 7/15/09, Joe Astorino <jastorino_at_ipexpert.com> wrote:
>> >
>> > Hi Jack,
>> >
>> > Basically it is done with MP-BGP extended communities:
>> >
>> >
>> > -- OSPF domain identifier extended community attribute -- This
>> identifies
>> > your OSPF domain
>> > -- OSPF route type extended community attribute -- This identifies the
>> LSA
>> > type
>> >
>> > That way, you can preserve everything over the BGP session and when it
>> gets
>> > to the other side and gets redistributed into OSPF it is transparent.
>> >
>> > On Wed, Jul 15, 2009 at 1:10 PM, Luan Nguyen <luan_at_netcraftsmen.net
>> >wrote:
>> >
>> >> You use the domain-id command.
>> >> PEs in MPLS run MP-BGP among themselves. You redistribute from PE-CE
>> >> routing protocol. Not quite understand your question...maybe you were
>> >> referring to Sham-Link?
>> >>
>> >>
>> http://www.cisco.com/en/US/docs/ios/12_2t/12_2t8/feature/guide/ospfshmk.html
>> >>
>> >> Regards,
>> >>
>> >> ------------------------------------
>> >> Luan Nguyen
>> >> Chesapeake NetCraftsmen, LLC.
>> >> http://www.netcraftsmen.net
>> >>
>> >> -----------------------------------
>> >>
>> >>
>> >> -----Original Message-----
>> >> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf
>> Of
>> >> jack
>> >> daniels
>> >> Sent: Wednesday, July 15, 2009 12:34 PM
>> >> To: Cisco certification
>> >> Subject: OSPF as Protocol between between CE and PE in MPLS
>> >>
>> >> Hi All,
>> >>
>> >> I have a querry when OSPF is used as Protocol between between CE and PE
>> in
>> >> MPLS -----
>> >>
>> >> Please answer inline -----
>> >>
>> >> 1) then we recieve our LSA 1 or 2 route in other CE as LSA 5 due to
>> >> redistribution ....?
>> >>
>> >> 2) but I read we can get routes as inter area ? HOW
>> >>
>> >> 3) also if MPLS core is acting as SUPERBACKBONE and we have AREA 0 in
>> >> customer sites , why will routes from cutomer CE area 0 to same
>> customer
>> >> other CE be sseen as O IA
>> >> ???
>> >>
>> >>
>> >> I'm still confused how is this done ..... I read about the Route type
>> and
>> >> route metric copied to BGP med ....
>> >> But how route is still maintained by what configuration
>> ................
>> >>
>> >>
>> >> Regards
>> >> J.Daniels
>> >>
>> >>
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>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >
>> >
>> >
>> > --
>> > Regards,
>> >
>> > Joe Astorino - CCIE #24347 R&S
>> > Technical Instructor - IPexpert, Inc.
>> > Cell: +1.586.212.6107
>> > Fax: +1.810.454.0130
>> > Mailto: jastorino_at_ipexpert.com
>>
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>
>
>
> --
> Bryan Bartik
> CCIE #23707 (R&S), CCNP
> Sr. Support Engineer - IPexpert, Inc.
> URL: http://www.IPexpert.com <http://www.ipexpert.com/>

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Received on Fri Jul 17 2009 - 10:43:05 ART