mpls draft-kini-rsvp-lsp-restoration-00.txt

[Curtis Villamizar <curtis@curtis-lt.avici.com>]

NAME OF I-D:

  <http://www.ietf.org/internet-drafts/draft-kini-rsvp-lsp-restoration-00.txt>

SUMMARY:
 
  "ReSerVation Protocol with Traffic Engineering extensions.Extension for 
  Label Switched Path estoration", Curtis Villamizar, T. V. Lakshman, 
  Sriganesh Kini, Murali Kodialam, 11/08/2000, 
  <draft-kini-rsvp-lsp-restoration-00.txt>                                 

    Traffic engineering using MPLS involves the setting up of label 
    switched paths (LSP) possibly with explicit routing and with bandwidth
    guarantees. The reliability of these LSPs can be increased by providing
    a backup LSP onto which traffic can be switched upon failure of an
    element in the path of the active LSP. Backup LSPs can be routed in a
    way that bandwidth can be shared between backup links of more than one
    active path while still guaranteeing recoverability for a set of
    failures. This sharing greatly increases the network efficiency thereby
    increasing the number of LSPs that can be carried while maintaining
    guarantees. Algorithms which can route such recoverable LSPs while
    using only aggregate network usage information are being developed.
    Keeping these algorithms as the primary motivation this document
    describes a mechanism to signal shared backup LSPs using RSVP.         

RELATED DOCUMENTS:
 
  "Shared backup Label Switched Path restoration", Curtis Villamizar, T. V.
  Lakshman, Sriganesh Kini, Murali Kodialam, 11/08/2000, 
  <draft-kini-restoration-shared-backup-00.txt>                            

  "Intermediate System to Intermediate System (IS-IS)     protocol
  extensions for Label Switched Path restoration", Curtis Villamizar, T. V.
  Lakshman, Sriganesh Kini, Murali Kodialam, 11/08/2000,
  <draft-kini-isis-lsp-restoration-00.txt>

  "Open Shortest Path First (OSPF) protocol extensions for Label Switched
  Path restoration", Curtis Villamizar, T. V. Lakshman, Sriganesh Kini,
  Murali Kodialam, 11/08/2000, <draft-kini-ospf-lsp-restoration-00.txt>

WHERE DOES IT FIT IN THE PICTURE OF THE SUB-IP WORK:

  It is in MPLS but the picture is broken.  GMPLS == C control and
  MPLS fits under GMPLS and over the others (OPT, TDM, ATM, FR, etc).

WHY IS IT TARGETED AT THIS WG:

  This work is generic to MPLS restoration and not specific to any
  underlying technology, such as optical switching.

JUSTIFICATION:

  See <draft-kini-restoration-shared-backup-00.txt> for overall
  description of this work.

  Protocol extensions to RSVP specifically for MPLS/TE are being
  handled in the MPLS WG and therefore this work fits into MPLS.

  The technique is generally applicable to MPLS and accommodated but
  is not specific to MPLS used in optical networks, rings, switched
  services, or TDM.  Therefore the MPLS WG would be slightly preferred
  over CCAMP.  If MPLS restoration is supposed to happen in CCAMP,
  then it belongs in CCAMP.