From: Moin, Imran (imoin@virtela.net)
Date: Tue Jun 28 2005 - 20:53:37 GMT-3
John,
This would be needed if Diptish wanted to support multiple VPNs out of the site with this CE router. That would be a "Carriers Supporting Carriers" model.
In Diptish's case, however, this is not needed. This is a single VPN network, with sites on two different MPLS-VPN providers. The solution can be easily achieved via routing. You announce all the networks reachable via Provider A to Provider B and vice-versa. This way if a site on Provider B's network wants to reach a site on Provider A's network, then this traffic will be routed through this common CE to Provider A.
Hope this helps.
Thanks,
Imran Moin
Senior Network Engineer
Virtela Communications
Voice: +1 720-475-4170
Fax: +1 720-475-4171
Email: imoin@virtela.net
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of Pearson John
Sent: Wednesday, June 01, 2005 5:07 AM
To: diptish doshi; ccielab@groupstudy.com
Subject: Re: OT : MPLS service provider peering through common CE router
i Diptish,
I believe you could peer with both MPLS Service Providers
ans provide connectivity between multiple VPNS in each. I
think that vrf-lite on the CE will provide the
functionaity you are looking for. To implement this you
would be looking at a separate eBGP peer with the PE for
each VPN for each Service Provider. eg. If Service
Provider A you had VPNs 1, 2 and 3 then you'd use 3 eBGP
peers (3 sub-interfaces on one physical link) to that PE
and likewise to Service Provider B's PE for VPNs 1, 2 and
3. On the CE you could place the same VPN subinterfaces in
the same VRF. Just a thought.
Cheers,
John
--- diptish doshi <diptishdoshi007@yahoo.com> wrote：
> hi friends ,
> A query about MPLS service provider peering .
>
> Below mention is the design issue im facing ...
>
> Consider a scenario in with a customer
> router
> CE has 2 links connected to 2 PE of 2 different
> MPLS
> service provider ( say Service provider A and
> Service
> provider B ) . Some of my sites are connected to
> service provider A and some are connected to service
> provider B . I want site in service provider A to be
> able to reach to site in service provider B and
> viceversa . BGP is the CE-PE routing protocol .
>
> What will be the best solution for this scenario ???
>
>
> I dont have required resources to try and confirm
> but
> what i feel is ... the above scenario wont be any
> problem because CE router will act as a normal
> transit
> path between the 2 service provider network .
> Please
> correct me if im wrong ?????
>
> What i'm not very sure is ... What will happen if
> there are multiple VPN of one client is both the
> service provider network and a continuity is
> required
> for that VPN across both the service provider
> network
> . That is , all the VPN's in service provider A's
> network should be reachable to VPN's of service
> provider B's network and Viceversa.The twist in this
> case , is we will also have to pass on the VPN
> information across the CE router .
>
> Will this be an issue ??? how can i resolve it ??
> Any
> document on this .. ??? Any pointers ???
>
>
>
> Thanks and Regards,
> Diptish Doshi
>
>
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