Re: MPLS VPN doubt

You are refferring to:

   One customer might use different RDs for the same IPv4 route. When a
   VPN site is connected to two PE routers, routes from the VPN site
   might get two different RDs, depending on which PE router the routes
   are received. Each IPv4 route would get two different RDs assigned and
   would have two completely different vpnv4 routes. This would allow BGP
   to see them as different routes and apply a different policy to the
   routes.

This is different RDs from different PEs. Not the same PE, as I
understood implied by "same VRF".

As Abraham explained, different RDs for the same route keep the routes
separated and makes it easier (and faster) to do things when route
reflectors are involved.

-Carlos

HEMANTH RAJ @ 30/6/2011 9:49 -0300 dixit:
> Hey all
> In MPLS Fundamentals, the page number is 205 in pdf . heck for the line
> The function of RD in the second paragraph
> It is written such as that in complex VPN they use two different RD's
> for a VPN
>
>
> On Thu, Jun 30, 2011 at 3:23 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar
> <mailto:tron_at_huapi.ba.ar>> wrote:
>
> I can not imagine a need to do so. I've never seen a way to do so
> either.
> (Note that he was not implying that *the same network* gets
> different RDs, just the same VRF)
>
> On the other hand, the show command displays "RD xx default for VRF yy",
> and that makes me believe that someone did think about being able to
> change that, something like a route-map set action.
>
> Would you please quote the paragraph that says so ?
>
> -Carlos
>
>
> Raghava Rao @ 30/06/2011 06:32 -0300 dixit:
>
> No, AFAIK..
>
> RD as you know distinguishes the same set of routes between two
> vrf's
>
> And why will you reuse the same IP address's in your vrf's again and
> distinguish it?? inside your own vrf's?
>
> You will never use the same ip addresses in your network,
> right?? then why
> do you need different RD inside the vrf?
>
> HTH
>
> Raghava Rao
>
> On Thu, Jun 30, 2011 at 2:37 PM, HEMANTH RAJ
> <hemanthrj_at_gmail.com <mailto:hemanthrj_at_gmail.com>> wrote:
>
> Hi fellows
> I have a doubt regarding MPLS L3 VPN, Can we use two
> different RD's in the
> same VRF. Is it possible. In MPLS Fundamentals, I came
> across a sentence
> which says that two different RD's are possible for the same
> VRF.
> Can anyone shed some light on it.
>
>
>
> --
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> H P HEMANTH RAJ
> CCIE#28593 (R&S)
> Cisco Systems
>
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> Carlos G Mendioroz <tron_at_huapi.ba.ar <mailto:tron_at_huapi.ba.ar>>
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>
> --
> Problems arise because we talk,problems are not solved because we don't
> talk So good or bad talk to your affectionate one's freely.
>
> Yours Friendly,
> H P HEMANTH RAJ
> CCIE#28593 (R&S)
> Cisco Systems
>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
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