Manageability of the QUIC Transport Protocol
draft-ietf-quic-manageability-09
Network Working Group M. Kuehlewind
Internet-Draft Ericsson
Intended status: Informational B. Trammell
Expires: 26 July 2021 Google
22 January 2021
Manageability of the QUIC Transport Protocol
draft-ietf-quic-manageability-09
Abstract
This document discusses manageability of the QUIC transport protocol,
focusing on caveats impacting network operations involving QUIC
traffic. Its intended audience is network operators, as well as
content providers that rely on the use of QUIC-aware middleboxes,
e.g. for load balancing.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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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 26 July 2021.
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Copyright (c) 2021 IETF Trust and the persons identified as the
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Kuehlewind & Trammell Expires 26 July 2021 [Page 1]
Internet-Draft QUIC Manageability January 2021
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Features of the QUIC Wire Image . . . . . . . . . . . . . . . 4
2.1. QUIC Packet Header Structure . . . . . . . . . . . . . . 4
2.2. Coalesced Packets . . . . . . . . . . . . . . . . . . . . 6
2.3. Use of Port Numbers . . . . . . . . . . . . . . . . . . . 6
2.4. The QUIC Handshake . . . . . . . . . . . . . . . . . . . 7
2.5. Integrity Protection of the Wire Image . . . . . . . . . 11
2.6. Connection ID and Rebinding . . . . . . . . . . . . . . . 11
2.7. Packet Numbers . . . . . . . . . . . . . . . . . . . . . 12
2.8. Version Negotiation and Greasing . . . . . . . . . . . . 12
3. Network-visible Information about QUIC Flows . . . . . . . . 12
3.1. Identifying QUIC Traffic . . . . . . . . . . . . . . . . 13
3.1.1. Identifying Negotiated Version . . . . . . . . . . . 13
3.1.2. Rejection of Garbage Traffic . . . . . . . . . . . . 14
3.2. Connection Confirmation . . . . . . . . . . . . . . . . . 14
3.3. Application Identification . . . . . . . . . . . . . . . 14
3.3.1. Extracting Server Name Indication (SNI)
Information . . . . . . . . . . . . . . . . . . . . . 15
3.4. Flow Association . . . . . . . . . . . . . . . . . . . . 16
3.5. Flow teardown . . . . . . . . . . . . . . . . . . . . . . 16
3.6. Flow Symmetry Measurement . . . . . . . . . . . . . . . . 16
3.7. Round-Trip Time (RTT) Measurement . . . . . . . . . . . . 17
3.7.1. Measuring Initial RTT . . . . . . . . . . . . . . . . 17
3.7.2. Using the Spin Bit for Passive RTT Measurement . . . 17
4. Specific Network Management Tasks . . . . . . . . . . . . . . 19
4.1. Stateful Treatment of QUIC Traffic . . . . . . . . . . . 19
4.2. Passive Network Performance Measurement and
Troubleshooting . . . . . . . . . . . . . . . . . . . . . 19
4.3. Server Cooperation with Load Balancers . . . . . . . . . 20
4.4. DDoS Detection and Mitigation . . . . . . . . . . . . . . 20
4.5. UDP Policing . . . . . . . . . . . . . . . . . . . . . . 21
4.6. Distinguishing Acknowledgment traffic . . . . . . . . . . 21
4.7. Quality of Service handling and ECMP . . . . . . . . . . 22
4.8. QUIC and Network Address Translation (NAT) . . . . . . . 22
4.8.1. Resource Conservation . . . . . . . . . . . . . . . . 23
4.8.2. "Helping" with routing infrastructure issues . . . . 23
4.9. Filtering behavior . . . . . . . . . . . . . . . . . . . 24
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