OSPF Extensions in Support of Generalized Multi-Protocol Label Switching (GMPLS) (RFC4203)
Original Publication Date: 2005-Oct-01
Included in the Prior Art Database: 2005-Oct-26
Internet Society Requests For Comment (RFCs)
K. Kompella: AUTHOR [+4]
This document specifies encoding of extensions to the OSPF routing protocol in support of Generalized Multi-Protocol Label Switching (GMPLS).
Network Working Group K. Kompella,
Request for Comments: 4203 Y. Rekhter, Ed.
Updates: 3630 Juniper Networks
Category: Standards Track October 2005
OSPF Extensions in Support of
Generalized Multi-Protocol Label Switching (GMPLS)
Status of This Memo
specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright (C) The Internet Society (2005).
specifies encoding of extensions to the OSPF routing
protocol in support of Generalized Multi-Protocol Label Switching
specifies extensions to the OSPF routing protocol
[OSPF] in support of carrying link state information for Generalized
Multi-Protocol Label Switching (GMPLS). The set of required
enhancements to OSPF are outlined in [GMPLS-ROUTING].
In this section,
we define the enhancements to the Traffic
Engineering (TE) properties of GMPLS TE links that can be announced
in OSPF TE LSAs. The TE LSA, which is an opaque LSA with area
flooding scope [OSPF-TE], has only one top-level Type/Length/Value
(TLV) triplet and has one or more nested sub-TLVs for extensibility.
The top-level TLV can take one of two values (1) Router Address or
(2) Link. In this document, we enhance the sub-TLVs for the Link TLV
in support of GMPLS. Specifically, we add the following sub-TLVs to
the Link TLV:
Kompella & Rekhter Standards Track [Page 1]
RFC 4203 OSPF Extensions in MPLS October 2005
Sub-TLV Type Length Name
11 8 Link Local/Remote Identifiers
14 4 Link Protection Type
15 variable Interface Switching Capability Descriptor
16 variable Shared Risk Link Group
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, RFC 2119
1.1. Link Local/Remote Identifiers
Local/Remote Identifiers is a sub-TLV of the Link TLV. The type