Controlling State Advertisements of Non-negotiated LDP Applications
RFC 7473
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Type |
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RFC - Proposed Standard
(March 2015; No errata)
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Last updated |
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2015-10-14
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Replaces |
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draft-raza-mpls-ldp-ip-pw-capability
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IETF
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Loa Andersson
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Shepherd write-up |
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Show
(last changed 2013-09-23)
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IESG state |
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RFC 7473 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Adrian Farrel
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Send notices to |
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(None)
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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RFC-Ed-Ack
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Internet Engineering Task Force (IETF) K. Raza
Request for Comments: 7473 S. Boutros
Category: Standards Track Cisco Systems, Inc.
ISSN: 2070-1721 March 2015
Controlling State Advertisements of Non-negotiated LDP Applications
Abstract
There is no capability negotiation done for Label Distribution
Protocol (LDP) applications that set up Label Switched Paths (LSPs)
for IP prefixes or that signal point-to-point (P2P) Pseudowires (PWs)
for Layer 2 Virtual Private Networks (L2VPNs). When an LDP session
comes up, an LDP speaker may unnecessarily advertise its local state
for such LDP applications even when the peer session is established
for some other applications like Multipoint LDP (mLDP) or the Inter-
Chassis Communication Protocol (ICCP). This document defines a
solution by which an LDP speaker announces to its peer its
disinterest in such non-negotiated applications, thus disabling the
unnecessary advertisement of corresponding application state, which
would have otherwise been advertised over the established LDP
session.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7473.
Raza & Boutros Standards Track [Page 1]
RFC 7473 State Adv. Control of Non-negotiated Apps March 2015
Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction ....................................................3
2. Conventions Used in This Document ...............................4
3. Non-negotiated LDP Applications .................................4
3.1. Uninteresting State ........................................5
3.1.1. Prefix-LSPs .........................................5
3.1.2. P2P-PWs .............................................5
4. Controlling State Advertisement .................................5
4.1. State Advertisement Control Capability .....................6
4.2. Capabilities Procedures ....................................8
4.2.1. State Control Capability in an
Initialization Message ..............................9
4.2.2. State Control Capability in a Capability Message ....9
5. Applicability Statement .........................................9
6. Operational Examples ...........................................11
6.1. Disabling Prefix-LSPs and P2P-PWs on an ICCP Session ......11
6.2. Disabling Prefix-LSPs on a L2VPN/PW tLDP Session ..........11
6.3. Disabling Prefix-LSPs Dynamically on an
Established LDP Session ...................................12
6.4. Disabling Prefix-LSPs on an mLDP-only Session .............12
6.5. Disabling IPv4 or IPv6 Prefix-LSPs on a Dual-Stack LSR ....12
7. Security Considerations ........................................13
8. IANA Considerations ............................................13
9. References .....................................................14
9.1. Normative References ......................................14
9.2. Informative References ....................................14
Acknowledgments ...................................................15
Authors' Addresses ................................................15
Raza & Boutros Standards Track [Page 2]
RFC 7473 State Adv. Control of Non-negotiated Apps March 2015
1. Introduction
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