Ethernet Traffic Parameters with Availability Information
RFC 8625
Internet Engineering Task Force (IETF) H. Long
Request for Comments: 8625 M. Ye, Ed.
Category: Standards Track Huawei Technologies Co., Ltd.
ISSN: 2070-1721 G. Mirsky, Ed.
ZTE
A. D'Alessandro
Telecom Italia S.p.A
H. Shah
Ciena
August 2019
Ethernet Traffic Parameters with Availability Information
Abstract
A packet-switching network may contain links with variable bandwidths
(e.g., copper and radio). The bandwidth of such links is sensitive
to the external environment (e.g., climate). Availability is
typically used to describe these links when doing network planning.
This document introduces an optional Bandwidth Availability TLV in
RSVP-TE signaling. This extension can be used to set up a GMPLS
Label Switched Path (LSP) in conjunction with the Ethernet
SENDER_TSPEC object.
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 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8625.
Long, et al. Standards Track [Page 1]
RFC 8625 Availability Extension to RSVP-TE August 2019
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Table of Contents
1. Introduction ....................................................3
1.1. Conventions Used in This Document ..........................4
2. Overview ........................................................4
3. Extension to RSVP-TE Signaling ..................................5
3.1. Bandwidth Availability TLV .................................5
3.2. Signaling Process ..........................................6
4. Security Considerations .........................................7
5. IANA Considerations .............................................8
6. References ......................................................8
6.1. Normative References .......................................8
6.2. Informative References .....................................9
Appendix A. Bandwidth Availability Example .......................11
Acknowledgments ...................................................13
Authors' Addresses ................................................13
Long, et al. Standards Track [Page 2]
RFC 8625 Availability Extension to RSVP-TE August 2019
1. Introduction
The RSVP-TE specification [RFC3209] and GMPLS extensions [RFC3473]
specify the signaling message, including the bandwidth request for
setting up an LSP in a packet-switching network.
Some data communication technologies allow a seamless change of the
maximum physical bandwidth through a set of known discrete values.
The parameter availability [G.827] [F.1703] [P.530] is often used to
describe the link capacity during network planning. The availability
is based on a time scale, which is a proportion of the operating time
that the requested bandwidth is ensured. A more detailed example of
bandwidth availability can be found in Appendix A. Assigning
different bandwidth availability classes to different types of
services over links with variable discrete bandwidth provides for a
more efficient planning of link capacity. To set up an LSP across
these links, bandwidth availability information is required for the
nodes to verify bandwidth satisfaction and make a bandwidth
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