Forwarding Layer Problem Statement
draft-bryant-arch-fwd-layer-ps-02
INTAREA Working Group S. Bryant
Internet-Draft U. Chunduri
Intended status: Informational T. Eckert
Expires: July 8, 2021 A. Clemm
Futurewei Technologies Inc.
January 04, 2021
Forwarding Layer Problem Statement
draft-bryant-arch-fwd-layer-ps-02
Abstract
This document considers the problems that need to addressed in IP in
order to address the use cases and new network services described in
draft-bryant-arch-fwd-layer-uc-00.
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 8, 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.
Bryant, et al. Expires July 8, 2021 [Page 1]
Internet-Draft FWD PS January 2021
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Forwarding Layer . . . . . . . . . . . . . . . . . . . . . . 4
3. Underlying New Requirements . . . . . . . . . . . . . . . . . 4
3.1. Better than Best Effort . . . . . . . . . . . . . . . . . 4
3.2. Efficient Packet Design . . . . . . . . . . . . . . . . . 5
3.3. Forwarding Identifiers . . . . . . . . . . . . . . . . . 6
3.4. Operational visibility . . . . . . . . . . . . . . . . . 6
3.5. Holistic Solution . . . . . . . . . . . . . . . . . . . . 7
4. Existing Protocol, Layering Challenges and Gaps . . . . . . . 7
4.1. Challenges with IPv6 . . . . . . . . . . . . . . . . . . 8
4.1.1. The End-to-End Model . . . . . . . . . . . . . . . . 8
4.1.2. Fixed Address Length . . . . . . . . . . . . . . . . 11
4.2. Better Than Best Effort E2E Network Services . . . . . . 13
4.3. Adaptive Bit-rate Video streaming . . . . . . . . . . . . 14
4.4. Limited Domain Opportunities . . . . . . . . . . . . . . 15
4.5. DetNet and Higher Precision Networking Service . . . . . 15
4.6. Forwarding Plane vs. Control Plane . . . . . . . . . . . 16
4.7. User-Network/Network-User Interface Signaling . . . . . . 17
5. Candidate Solution Directions . . . . . . . . . . . . . . . . 18
5.1. Variable Length Addresses . . . . . . . . . . . . . . . . 18
5.2. Address Semantics . . . . . . . . . . . . . . . . . . . . 19
5.3. Multiple Instructions . . . . . . . . . . . . . . . . . . 19
5.4. Node and Path Specific Processing Instructions . . . . . 19
5.5. Integrated Assurance and Verification . . . . . . . . . . 20
5.6. For Consideration in a Future Version . . . . . . . . . . 20
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 20
7. Security Considerations . . . . . . . . . . . . . . . . . . . 21
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.1. Normative References . . . . . . . . . . . . . . . . . . 21
8.2. Informative References . . . . . . . . . . . . . . . . . 21
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 27
1. Introduction
There is an emerging set of new requirements that exceed the network
and transport services of the current Internet, which only delivers
"best effort" service. While many controlled or private networks
include further services, such as other DiffServ QoS in addition to
best effort and traffic engineering with bandwidth guarantees, the
solutions used today only support walled gardens and are thus not
Show full document text