< draft-ietf-idr-eag-distribution-06.txt		draft-ietf-idr-eag-distribution-07.txt >
	IDR Working Group Z. Wang		IDR Working Group Z. Wang
	Internet-Draft Q. Wu		Internet-Draft Q. Wu
	Intended status: Standards Track Huawei		Intended status: Standards Track Huawei
	Expires: September 20, 2018 J. Tantsura		Expires: March 14, 2019 J. Tantsura
	Nuage Networks		Nuage Networks
	March 19, 2018		September 10, 2018
	Distribution of MPLS-TE Extended admin Group Using BGP		Distribution of MPLS-TE Extended admin Group Using BGP
	draft-ietf-idr-eag-distribution-06		draft-ietf-idr-eag-distribution-07
	Abstract		Abstract
	As MPLS-TE network grows, administrative Groups advertised as a		As MPLS-TE network grows, administrative Groups advertised as a
	fixed-length 32-bit Bitmask is quite constraining. "Extended		fixed-length 32-bit Bitmask is quite constraining. "Extended
	Administrative Group" IGP TE extensions sub-TLV is introduced to		Administrative Group" IGP TE extensions sub-TLV is introduced to
	provide for additional administrative groups (link colors) beyond the		provide for additional administrative groups (link colors) beyond the
	current limit of 32. This document describes extensions to BGP		current limit of 32. This document describes extensions to BGP
	protocol, that can be used to distribute extended administrative		protocol, that can be used to distribute extended administrative
	groups in MPLS-TE.		groups in MPLS-TE.
	skipping to change at page 1, line 38 ¶		skipping to change at page 1, line 38 ¶
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF). Note that other groups may also distribute		Task Force (IETF). Note that other groups may also distribute
	working documents as Internet-Drafts. The list of current Internet-		working documents as Internet-Drafts. The list of current Internet-
	Drafts is at https://datatracker.ietf.org/drafts/current/.		Drafts is at https://datatracker.ietf.org/drafts/current/.
	Internet-Drafts are draft documents valid for a maximum of six months		Internet-Drafts are draft documents valid for a maximum of six months
	and may be updated, replaced, or obsoleted by other documents at any		and may be updated, replaced, or obsoleted by other documents at any
	time. It is inappropriate to use Internet-Drafts as reference		time. It is inappropriate to use Internet-Drafts as reference
	material or to cite them other than as "work in progress."		material or to cite them other than as "work in progress."
	This Internet-Draft will expire on September 20, 2018.		This Internet-Draft will expire on March 14, 2019.
	Copyright Notice		Copyright Notice
	Copyright (c) 2018 IETF Trust and the persons identified as the		Copyright (c) 2018 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
	(https://trustee.ietf.org/license-info) in effect on the date of		(https://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
	carefully, as they describe your rights and restrictions with respect		carefully, as they describe your rights and restrictions with respect
	to this document. Code Components extracted from this document must		to this document. Code Components extracted from this document must
	include Simplified BSD License text as described in Section 4.e of		include Simplified BSD License text as described in Section 4.e of
	the Trust Legal Provisions and are provided without warranty as		the Trust Legal Provisions and are provided without warranty as
	described in the Simplified BSD License.		described in the Simplified BSD License.
	Table of Contents		Table of Contents
	1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2		1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
	2. Conventions used in this document . . . . . . . . . . . . . . 2		2. Requirements Language . . . . . . . . . . . . . . . . . . . . 2
	3. Carrying Extended Administrative Groups in BGP . . . . . . . 2		3. Carrying Extended Administrative Groups in BGP . . . . . . . 3
	3.1. AG and EAG coexistence . . . . . . . . . . . . . . . . . 3		3.1. AG and EAG coexistence . . . . . . . . . . . . . . . . . 3
	3.2. Desire for unadvertised EAG bits . . . . . . . . . . . . 3		3.2. Desire for unadvertised EAG bits . . . . . . . . . . . . 4
	4. Security Considerations . . . . . . . . . . . . . . . . . . . 4		4. Security Considerations . . . . . . . . . . . . . . . . . . . 4
	5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4		5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
	6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 4		6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 4
	7. Normative References . . . . . . . . . . . . . . . . . . . . 4		7. Normative References . . . . . . . . . . . . . . . . . . . . 4
	Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4		Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5
	1. Introduction		1. Introduction
	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 defined in OSPFv2 (RFC3630), OSPFv3 (RFC5329) and ISIS		the Link TLV defined in OSPFv2 (RFC3630), OSPFv3 (RFC5329) and ISIS
	(RFC5305).		(RFC5305).
	As MPLS-TE network grows, administrative Groups advertised as a		As MPLS-TE network grows, administrative Groups advertised as a
	fixed-length 32-bit Bitmask is quite constraining. "Extended		fixed-length 32-bit Bitmask is quite constraining. "Extended
	Administrative Group" IGP TE extensions sub-TLV defined in [RFC7308]		Administrative Group" IGP TE extensions sub-TLV defined in [RFC7308]
	is introduced to provide for additional administrative groups (link		is introduced to provide for additional administrative groups (link
	colors) beyond the current limit of 32.		colors) beyond the current limit of 32.
	This document proposes new BGP Link attribute TLVs that can be		This document proposes new BGP Link attribute TLVs that can be
	announced as attribute in the BGP-LS attribute (defined in [I.D-ietf-		announced as attribute in the BGP-LS attribute (defined in [I.D-ietf-
	idr-ls-distribution]) to distribute extended administrative groups in		idr-ls-distribution]) to distribute extended administrative groups in
	MPLS-TE.		MPLS-TE.
	2. Conventions used in this document		2. Requirements Language
	The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",		The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
	"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this		"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
	document are to be interpreted as described in RFC2119 [RFC2119].		"OPTIONAL" in this document are to be interpreted as described in BCP
			14 [RFC2119] [RFC8174] when, and only when, they appear in all
			capitals, as shown here.
	3. Carrying Extended Administrative Groups in BGP		3. Carrying Extended Administrative Groups in BGP
	This document proposes one new BGP link attribute TLVs that can be		This document proposes one new BGP link attribute TLVs that can be
	announced as attribute in the BGP-LS attribute (defined in [I.D-ietf-		announced as attribute in the BGP-LS attribute (defined in [I.D-ietf-
	idr-ls-distribution]) to distribute extended administrative groups.		idr-ls-distribution]) to distribute extended administrative groups.
	The extensions in this document build on the ones provided in BGP-LS		The extensions in this document build on the ones provided in BGP-LS
	[RFC7752] and BGP-4 [RFC4271].		[RFC7752] and BGP-4 [RFC4271].
	BGP-LS attribute defined in [RFC7752] has nested TLVs which allow the		BGP-LS attribute defined in [RFC7752] has nested TLVs which allow the
	BGP-LS attribute to be readily extended. Link attribute TLVs defined		BGP-LS attribute to be readily extended. Link attribute TLVs defined
	in section 3.2.2 of [I-D.ietf-idr-ls-distribution]are TLVs that may		in section 3.2.2 of [I-D.ietf-idr-ls-distribution]are TLVs that may
	be encoded in the BGP-LS attribute with a link NLRI. Each 'Link		be encoded in the BGP-LS attribute with a link NLRI. Each 'Link
	Attribute' is a Type/Length/ Value (TLV) triplet formatted as defined		Attribute' is a Type/Length/ Value (TLV) triplet formatted as defined
	in Section 3.1 of [I-D.ietf-idr-ls-distribution].		in Section 3.1 of [I-D.ietf-idr-ls-distribution].
	skipping to change at page 4, line 43 ¶		skipping to change at page 5, line 5 ¶
	[RFC5305] Li, T. and H. Smit, "IS-IS Extensions for Traffic		[RFC5305] Li, T. and H. Smit, "IS-IS Extensions for Traffic
	Engineering", RFC 5305, October 2008.		Engineering", RFC 5305, October 2008.
	[RFC7308] Osborne, E., "Extended Administrative Groups in MPLS-TE",		[RFC7308] Osborne, E., "Extended Administrative Groups in MPLS-TE",
	ID RFC7308, July 2014.		ID RFC7308, July 2014.
	[RFC7752] Gredler, H., "North-Bound Distribution of Link-State and		[RFC7752] Gredler, H., "North-Bound Distribution of Link-State and
	TE Information using BGP", RFC 7752, March 2016.		TE Information using BGP", RFC 7752, March 2016.
			[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
			2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
			May 2017, <https://www.rfc-editor.org/info/rfc8174>.
	Authors' Addresses		Authors' Addresses
	Zitao Wang		Zitao Wang
	Huawei		Huawei
	101 Software Avenue, Yuhua District		101 Software Avenue, Yuhua District
	Nanjing, Jiangsu 210012		Nanjing, Jiangsu 210012
	China		China
	Email: wangzitao@huawei.com		Email: wangzitao@huawei.com
	Qin Wu		Qin Wu
	Huawei		Huawei
	101 Software Avenue, Yuhua District		101 Software Avenue, Yuhua District
	Nanjing, Jiangsu 210012		Nanjing, Jiangsu 210012
	China		China
	Email: bill.wu@huawei.com		Email: bill.wu@huawei.com
	Jeff Tantsura		Jeff Tantsura
	Nuage Networks		Nuage Networks
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