RE: Draft charter for L3VPN: inter-AS/inter-provider

> >>
> >>  1. Jim Guichard said:
> >>
> >>       > 2. Is complexity associated with inter-AS (1 provider)
> >scenarios
> >>       >    sufficiently higher than for the single-AS case?
> >>
> >>       potentially yes for the same reasons as (1). Jim
> >>
> >>     Two reasons have been brought in (1):
> >>
> >>       a) different encaps for 2547 (MPLS/GRE)
> >
> >There is no fundamental difference with regards to supporting different
> >encaps in the single AS and inter-AS case.

Perhaps, but certainly it is potentially more difficult. In the single AS
case one would expect routing information to be available so as to build the
ingress/egress PE connectivity. However, in the InterAS case this may not be
available and therefore complexity is added as the ASBRs might need to
"stitch" things together .. I do however believe that the single AS and
multiAS case are similar as typically routing information is leaked between
the AS's that make up the multiAS environment. Jim

> >
> >>       b) provisioning end-to-end LSP is more complex in the multi-AS
> >>          case
> >>
> >>     It seems that this may indeed complicate the mechanisms.
> >>     I'd love to see a little more discussion on this.
> >
> >2547 describes the mechansims for inter-AS. IMHO they are well
> >understood.
> >Set up of a RSVP-TE inter-AS LSP is work in progress. However
> >2547 does not need any additional mechanisms for using a RSVP-TE inter-AS
> >LSP between the end PEs.
> >
> >>
> >>  2. Are we going to need additional documents compared to what we
> >>     already have in order to describe inter-AS scenarios
> >>     appropriately?
> >
> >Base mechanisms for implementing and deploying inter-AS are in place and
> >are described in 2547.
> >
> >If yes, I'd rather say one-AS first, then multi-AS
> >>     single provider, and then multi-provider.
> >>
> >
> >I would still say one-AS and multi-AS to begin with.
> >
> >Regards,
> >rahul
> >
> >>  Regards.
> >>
> >> Alex
> >>
> >>
> >>
> >>
> >
> >
> >