draft-ietf-mpls-extended-admin-group-05.txt   draft-ietf-mpls-extended-admin-group-06.txt 
Network Working Group E. Osborne Network Working Group E. Osborne
Internet-Draft Internet-Draft
Intended status: Standards Track April 21, 2014 Intended status: Standards Track April 29, 2014
Expires: October 23, 2014 Expires: October 31, 2014
Extended Administrative Groups in MPLS-TE Extended Administrative Groups in MPLS-TE
draft-ietf-mpls-extended-admin-group-05 draft-ietf-mpls-extended-admin-group-06
Abstract Abstract
MPLS-TE advertises 32 administrative groups (commonly referred to as MPLS-TE advertises 32 administrative groups (commonly referred to as
"colors" or "link colors") using the Administrative Group sub-TLV of "colors" or "link colors") using the Administrative Group sub-TLV of
the Link TLV. This is defined for OSPFv2 (RFC3630), OSPFv3 (RFC5329) the Link TLV. This is defined for OSPFv2 (RFC3630), OSPFv3 (RFC5329)
and ISIS (RFC5305). and ISIS (RFC5305).
This document adds a sub-TLV to the IGP TE extensions, "Extended This document adds a sub-TLV to the IGP TE extensions, "Extended
Administrative Group". This sub-TLV provides for additional Administrative Group". This sub-TLV provides for additional
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This Internet-Draft will expire on October 23, 2014. This Internet-Draft will expire on October 31, 2014.
Copyright Notice Copyright Notice
Copyright (c) 2014 IETF Trust and the persons identified as the Copyright (c) 2014 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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document provides no support for signaling EAG. It provides no document provides no support for signaling EAG. It provides no
analog to either the SESSION_ATTRIBUTE of C-Type 1 defined in analog to either the SESSION_ATTRIBUTE of C-Type 1 defined in
[RFC3209], nor the LSPA object of the Path Computation Element [RFC3209], nor the LSPA object of the Path Computation Element
Communication Protocol (PCEP) defined in [RFC5440]. Communication Protocol (PCEP) defined in [RFC5440].
2. Extended Administrative Groups sub-TLV 2. Extended Administrative Groups sub-TLV
This document defines a sub-TLV of the Link TLV for both OSPF This document defines a sub-TLV of the Link TLV for both OSPF
[RFC3630] and ISIS [RFC5305] called the Extended Administrative [RFC3630] and ISIS [RFC5305] called the Extended Administrative
Groups (EAG) sub-TLV. The EAG sub-TLV is used in addition to the Groups (EAG) sub-TLV. The EAG sub-TLV is used in addition to the
Administrative Groups when a node wishes to advertise more than 32 Administrative Groups when an operator wants to make more than 32
colors for a link. The EAG sub-TLV is optional. Coexistence of EAG colors available for advertisement in a network. The EAG sub-TLV is
and AG TLVs is covered in Section 2.3.1 of this document. optional. Coexistence of EAG and AG TLVs is covered in Section 2.3.1
of this document.
This document uses the term 'colors' as a shorthand to refer to This document uses the term 'colors' as a shorthand to refer to
particular bits with an AG or EAG. The examples in this document use particular bits with an AG or EAG. The examples in this document use
'red' to represent the least significant bit in the AG (red == 0x1), 'red' to represent the least significant bit in the AG (red == 0x1),
'blue' to represent the second bit (blue == 0x2). To say that a link 'blue' to represent the second bit (blue == 0x2). To say that a link
has a given color or that the specified color is set on the link is has a given color or that the specified color is set on the link is
to say that the corresponding bit or bits in the link's AG are set to to say that the corresponding bit or bits in the link's AG are set to
1. 1.
2.1. Packet Format 2.1. Packet Format
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