A Simple Control Protocol for MPLS SFLs
draft-ietf-mpls-sfl-control-00
MPLS Working Group S. Bryant
Internet-Draft Futurewei Technologies Inc.
Intended status: Standards Track G. Swallow
Expires: July 17, 2021 Southend Technical Center
S. Sivabalan
Ciena Corporation
January 13, 2021
A Simple Control Protocol for MPLS SFLs
draft-ietf-mpls-sfl-control-00
Abstract
In draft-ietf-mpls-sfl-framework the concept of MPLS synonymous flow
labels (SFL) was introduced. This document describes a simple
control protocol that runs over an associated control header to
request, withdraw, and extend the lifetime of such labels. It is not
the only control protocol that moght be used to support SFL, but it
has the benefit of being able to be used without modifying of the
existing MPLS control prodocols. The existance of this design is not
intended to restrict the ability to enhance an existing MPLS control
protocol to add a similar capability.
A Querier MUST wait a configured time (suggested wait of 60 seconds)
before re-attempting a Withdraw request. No more than three Withdraw
requests SHOULD be made. These restricctions are to prevent
overloading the control plane of the actioning router.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on July 17, 2021.
Bryant, et al. Expires July 17, 2021 [Page 1]
Internet-Draft MPLS SFL Control January 2021
Copyright Notice
Copyright (c) 2021 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
(https://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 . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. SFL Control . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.1. SFL Control Message . . . . . . . . . . . . . . . . . . . 3
3.2. SFL Control Procedures . . . . . . . . . . . . . . . . . 7
3.2.1. Request/Grant . . . . . . . . . . . . . . . . . . . . 7
3.2.2. Refresh . . . . . . . . . . . . . . . . . . . . . . . 9
3.2.3. Withdraw . . . . . . . . . . . . . . . . . . . . . . 10
3.2.4. Timer Accuracy . . . . . . . . . . . . . . . . . . . 10
4. Return Path . . . . . . . . . . . . . . . . . . . . . . . . . 11
5. Privacy Considerations . . . . . . . . . . . . . . . . . . . 11
6. Security Considerations . . . . . . . . . . . . . . . . . . . 11
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
7.1. Allocation of MPLS Generalized Associated Channel (G-ACh)
Type . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.2. Creation of SFL Simple Control Code Registry . . . . . . 12
8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 12
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 12
9.1. Normative References . . . . . . . . . . . . . . . . . . 12
9.2. Informative References . . . . . . . . . . . . . . . . . 13
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 13
1. Introduction
In [I-D.ietf-mpls-sfl-framework] the concept of MPLS synonymous flow
labels (SFL) was introduced. This document describes a simple
control protocol, for use in a well-managed MPLS network, that runs
over an associated control header to request, withdraw, and extend
the lifetime of such labels. It is not the only control protocol
that moght be used to support SFL, but it has the benefit of being
Show full document text