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

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.
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