The MPLS WG Archive

[Anca Zamfir <ancaz@cisco.com>]

Yakov,
What goes in the IF-ID RSVP_HOP TLVs if upstream and downstream directions 
use different numbered component links?
Thanks,
Anca

At 06:58 AM 3/10/2003 -0800, Yakov Rekhter wrote:
>Sameer,
>
> >
> > Reposting, as I did not get any response.  Could
> > someone please answer the question.
>
>from  draft-ietf-mpls-bundle-04.txt:
>
>    If the component link is numbered, the IF_ID RSVP_HOP object, or
>    IF_ID TLV carries either Type 1 (IPv4 address) or Type 2 (IPv6
>    address) TLVs (see [GMPLS-SIG]). The address carried in the TLV
>    identifies the link for which label allocation must be done.
>
>    If the component link is unnumbered, the IF_ID RSVP_HOP object, or
>    IF_ID TLV carries Type 3 (IF_INDEX) TLV (see [GMPLS-SIG]). The
>    value carried in Type 3 TLV contains the identifier of the selected
>    component link assigned to the link by the sender of the Path/REQUEST
>    message. Processing this object is the same as specified in Section
>    "Processing the IF_ID RSVP_HOP object"/"Processing the IF_ID TLV"
>    of [RSVP-UNNUM]/[CRLDP-UNNUM].
>
>Yakov.
>
> >
> > Thanks
> > - Sameer
> >
> > --- Sameer K <sameerdw@yahoo.com> wrote:
> > > Hello All,
> > >
> > > From the RFC 3471 - GMPLS Signaling Functional
> > > Description, Section 9.1.1, it appears that there is
> > > no way for upstream node, to specify component links
> > > that are numbered, in the IF-ID HOP object.
> > >
> > > The TLV format for IF-ID Types 4 and 5 assumes that
> > > the component link is always un-numbered.
> > >
> > > Is this the way it was planned to be?.  If yes, then
> > > what should IF-ID look like for numbered component
> > > link (which is a valid scenario per the Link
> > > Bundling
> > > draft).
> > >
> > > Or did I get it all wrong?
> > > TIA
> > > - Sameer
> > >
> > >
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--------------------------------------------
Anca Zamfir                                Public Carrier IP
Cisco Systems, Inc.                    email: ancaz@cisco.com
2000 Innovation Dr., Kanata          tel#: (613) 254-3484
Ontario, CANADA  K2K 3E8         fax:  (613) 254-3717