[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: new version: draft-zhang-mpls-interas-te-req-01.txt



Hi Yuichi,

At 10:48 PM 2/5/2003 +0900, Yuichi Ikejiri wrote:
Hi Raymond,

> >  - the functionality or case of interconencting each MPLS TE LSP at ASBR.
> >       - there could be some cases that RSP or GRP's internal
> >         MPLS TEs are connected to Inter-AS TE at ASBR.
>
> I am not sure of this point... it would be good if you could provide an
> example or elaborate a bit more ?  Inter-AS TE tunnel as defined in this
> draft is intended to be established end-to-end, not by segments stitched
> together...  Section 5.8 defines the requirements of TE LSP aggregation
> whereby an Inter-AS TE tunnel may be aggregated onto the intra-AS MPLS-TE
> LSP so as to reduce the # of tunnel states...
I assume the case below.

CE1--RSP(PE)---ASBR----ASBR----GSP(PE)----CE2
 <------Inter-AS-TE---------><----Internal-TE--->
                                      ~~~~
                  (interconnecting or mapping)

You mention vrf to inter-as-TE mapping at ASBR in Section5.9 but
I think that the mapping function would not be limmited to vrf cases
as a general requirement, even if any specific function might not be
needed as a result or be out of scope of this document.
Thanks for the clarification. Section 5.9 presents a requirement for case 2 of Scenario II in sec. 4.2. The Inter-AS TE tunnels are meant to be extended virtual local loops over RSP's network which maybe terminated at the ASBR or any PE in the GSP's network (I will update case 2 diagram to reflect your diagram above). In other words, the inter-AS TE and Internal-TE are essentially the same RSVP-TE tunnel.

Your are right on the point of not being limited to vrf cases, it could be in global space as well. Thanks for pointing this out.

Regards,
Yuichi

>
>
> >Regards,
> >Yuichi Ikejiri
> >NTT Communications Corporation
> >
> >On Fri, 20 Dec 2002 13:39:28 -0500
> >Jean Philippe Vasseur <jvasseur@cisco.com> wrote:
> >
> > > Hi,
> > >
> > > First of all, thanks for the various comments we received and that are now
> > > integrated in the version -01 of the inter-AS TE requirements draft (just
> > > posted:
> > >
> > http://www.ietf.org/internet-drafts/draft-zhang-mpls-interas-te-req-01.txt).
> > > Some other Service Providers will join the draft in the next release. Your
> > > comments on the list are very welcome.
> > >
> > > Thanks.
> > >
> > > JP.
> > >
> > >
>