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

You need to read and understand the following - it's from the MPLS config
on IOS book.

Go through this -

http://fengnet.com/book/IOS_MPLS/ch05lev1sec1.html

1) then we recieve our LSA 1 or 2 route in other CE as LSA 5 due to

redistribution ....?

                you need to understand the domain-id concept in MPLS OSPF
superbackbone

2) but I read we can get routes as inter area ? HOW

                Same thing you need to understand the domain-id concept in
MPLS OSPF superbackbone

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

??? CE-OSPF area0 is considered different than OSPF super backbone area0. so
even if CE has area0 on both sides across the SP, it'll generate inter-area
routes.

Cheers

Swap

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Persio Pucci
Sent: Wednesday, July 15, 2009 10:51 PM
To: Luan Nguyen
Cc: jack daniels; Cisco certification
Subject: Re: OSPF as Protocol between between CE and PE in MPLS

I think Luan is right, your answer is a combination of domain-id (to make

the PE/CEs aware that it is the same OSPF domain) and sham-links, which will

make the CE's see the routes as intra area...

On Wed, Jul 15, 2009 at 2:10 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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Received on Wed Jul 15 2009 - 23:17:02 ART