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Re: Re: MPLS on Interface/ recursive VPNS

  • From: "Sudha" <sudha.r@ddsl.net>
  • Date: Tue, 8 Feb 2005 18:53:51 +0530
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Hi Sylvia,
    AS Override option needs to be enabled at both the CE Routers for them to exchange routes among themselves which are of same AS.
 
Pls let me know what exact problem u face...
 
Regards.
Sudha.
 
----- Original Message -----
Sent: Saturday, January 22, 2005 4:29 PM
Subject: Re: [MPLS-OPS]: Re: MPLS on Interface/ recursive VPNS

hello friends,
> >
> > Not necessarily. If the motive is to provide the
> transport service, then
> > CsC is still the way to go.
> > Whether the ASN values are the same or not usually
> has no relevance to
> > the above conclusion.
>
> Yeap.I go agress about this. Even public or private
> ASN can be done
> without overlapping ip addresses :)
>
> > And this is no different from the usual VPN
> service. Think of it as the
> > following -
> >  1) If the VPN customer has the same ASN in all
> the sites, then the SP
> > need to use "as-override"

To comphend this I was trying this in my lab:

AS1-------AS2---------AS1
|          |           |
 ---------AS3----------

so AS2 and AS3 are carrier of carriers?

When I do AS1 over ride on AS1 routers, and I withdraw
a prefix from the left side AS1, the above topology
does not seem to converge :(, the one on the right
still advertises it :(

I think it must be a configuration issue?



> >      to facilitate the CE routes being accepted at
> the other CEs.
> >  2) If the VPN customer has unique ASN in each
> site, then the SP doesn't
> > need to use
> >      any special knob, since BGP (at the CE) would
> accept the remote
> > site routes just fine.
>






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