RFC 4802:Generalized Multiprotocol Label Switching...
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1. Introduction


   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it describes managed objects for modeling Generalized
   Multiprotocol Label Switching (GMPLS) [RFC3945] based traffic
   engineering (TE).  The tables and objects defined in this document
   extend those defined in the equivalent document for MPLS traffic
   engineering [RFC3812], and management of GMPLS traffic engineering is
   built on management of MPLS traffic engineering.

   The MIB modules in this document should be used in conjunction with
   the companion document [RFC4803] for GMPLS-based traffic engineering
   configuration and management.

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in BCP 14, [RFC2119].


1.1. Migration Strategy


   MPLS-TE Label Switched paths (LSPs) may be modeled and managed using
   the MPLS-TE-STD-MIB module [RFC3812].

   Label Switching Routers (LSRs) may be migrated to model and manage
   their TE LSPs using the MIB modules in this document in order to
   migrate the LSRs to GMPLS support, or to take advantage of additional
   MIB objects defined in these MIB modules that are applicable to
   MPLS-TE.

   The GMPLS TE MIB module (GMPLS-TE-STD-MIB) defined in this document
   extends the MPLS-TE-STD-MIB module [RFC3812] through a series of
   augmentations and sparse augmentations of the MIB tables.  The only
   additions are for support of GMPLS or to support the increased
   complexity of MPLS and GMPLS systems.

   In order to migrate from MPLS-TE-STD-MIB support to GMPLS-TE-STD-MIB
   support, an implementation needs only to add support for the
   additional tables and objects defined in GMPLS-TE-STD-MIB.  The
   gmplsTunnelLSPEncoding may be set to tunnelLspNotGmpls to allow an
   MPLS-TE LSP tunnel to benefit from the additional objects and tables
   of GMPLS-LSR-STD-MIB without supporting the GMPLS protocols.

   The companion document for modeling and managing GMPLS-based LSRs
   [RFC4803] extends the MPLS-LSR-STD-MIB module [RFC3813] with the same
   intentions.

   Textual conventions are defined in [RFC3811] and the IANA-GMPLS-TC-
   MIB module.



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