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

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
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Received on Thu Jul 16 2009 - 21:06:25 ART