Circuit Breaker Assisted Congestion Control
draft-ietf-mboned-cbacc-00
Mboned J. Holland
Internet-Draft Akamai Technologies, Inc.
Intended status: Standards Track March 10, 2020
Expires: September 11, 2020
Circuit Breaker Assisted Congestion Control
draft-ietf-mboned-cbacc-00
Abstract
This document specifies Circuit Breaker Assisted Congestion Control
(CBACC). CBACC enables fast-trip Circuit Breakers by publishing rate
metadata about multicast channels from senders to intermediate
network nodes or receivers. The circuit breaker behavior is defined
as a supplement to receiver driven congestion control systems, to
preserve network health if receivers subscribe to a volume of traffic
that exceeds capacity policies or capability for a network or
receiver.
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Holland Expires September 11, 2020 [Page 1]
Internet-Draft CBACC March 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Background and Terminology . . . . . . . . . . . . . . . 3
2. Circuit Breaker Behavior . . . . . . . . . . . . . . . . . . 4
2.1. Functional Components . . . . . . . . . . . . . . . . . . 4
2.1.1. Ingress Meter . . . . . . . . . . . . . . . . . . . . 4
2.1.2. Egress Meter . . . . . . . . . . . . . . . . . . . . 4
2.1.3. Communication Method . . . . . . . . . . . . . . . . 5
2.1.4. Measurement Function . . . . . . . . . . . . . . . . 5
2.1.5. Trigger Function . . . . . . . . . . . . . . . . . . 6
2.1.6. Reaction . . . . . . . . . . . . . . . . . . . . . . 7
2.1.7. Feedback Control Mechanism . . . . . . . . . . . . . 7
2.2. States . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2.1. Interface State . . . . . . . . . . . . . . . . . . . 7
2.2.2. Flow State . . . . . . . . . . . . . . . . . . . . . 8
2.3. Implementation Design Considerations . . . . . . . . . . 8
2.3.1. Oversubscription Thresholds . . . . . . . . . . . . . 8
2.3.2. Fairness Functions . . . . . . . . . . . . . . . . . 9
3. YANG Module . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1. Tree Diagram . . . . . . . . . . . . . . . . . . . . . . 9
3.2. Module . . . . . . . . . . . . . . . . . . . . . . . . . 9
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
4.1. YANG Module Names Registry . . . . . . . . . . . . . . . 11
5. Security Considerations . . . . . . . . . . . . . . . . . . . 11
5.1. Metadata Security . . . . . . . . . . . . . . . . . . . . 11
5.2. Denial of Service . . . . . . . . . . . . . . . . . . . . 11
5.2.1. State Overload . . . . . . . . . . . . . . . . . . . 11
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 12
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 12
7.1. Normative References . . . . . . . . . . . . . . . . . . 12
7.2. Informative References . . . . . . . . . . . . . . . . . 13
Appendix A. Overjoining . . . . . . . . . . . . . . . . . . . . 14
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction
This document defines Circuit Breaker Assisted Congestion Control
(CBACC). CBACC defines a Network Transport Circuit Breaker (CB), as
described by [RFC8084].
The CB behavior defined in this document uses bit-rate metadata about
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