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draft-ietf-quic-load-balancers.html
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<!DOCTYPE html>
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<title>QUIC-LB: Generating Routable QUIC Connection IDs</title>
<meta content="Martin Duke" name="author">
<meta content="Nick Banks" name="author">
<meta content="Christian Huitema" name="author">
<meta content="
The QUIC protocol design is resistant to transparent packet inspection,
injection, and modification by intermediaries. However, the server can
explicitly cooperate with network services by agreeing to certain conventions
and/or sharing state with those services. This specification provides a
standardized means of solving three problems: (1) maintaining routability to
servers via a low-state load balancer even when the connection IDs in use
change; (2) explicit encoding of the connection ID length in all packets to
assist hardware accelerators; and (3) injection of QUIC Retry packets by an
anti-Denial-of-Service agent on behalf of the server.
" name="description">
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<table class="ears">
<thead><tr>
<td class="left">Internet-Draft</td>
<td class="center">QUIC-LB</td>
<td class="right">February 2022</td>
</tr></thead>
<tfoot><tr>
<td class="left">Duke, et al.</td>
<td class="center">Expires 12 August 2022</td>
<td class="right">[Page]</td>
</tr></tfoot>
</table>
<div id="external-metadata" class="document-information"></div>
<div id="internal-metadata" class="document-information">
<dl id="identifiers">
<dt class="label-workgroup">Workgroup:</dt>
<dd class="workgroup">QUIC</dd>
<dt class="label-internet-draft">Internet-Draft:</dt>
<dd class="internet-draft">draft-ietf-quic-load-balancers-latest</dd>
<dt class="label-published">Published:</dt>
<dd class="published">
<time datetime="2022-02-08" class="published">8 February 2022</time>
</dd>
<dt class="label-intended-status">Intended Status:</dt>
<dd class="intended-status">Standards Track</dd>
<dt class="label-expires">Expires:</dt>
<dd class="expires"><time datetime="2022-08-12">12 August 2022</time></dd>
<dt class="label-authors">Authors:</dt>
<dd class="authors">
<div class="author">
<div class="author-name">M. Duke</div>
<div class="org">Google</div>
</div>
<div class="author">
<div class="author-name">N. Banks</div>
<div class="org">Microsoft</div>
</div>
<div class="author">
<div class="author-name">C. Huitema</div>
<div class="org">Private Octopus Inc.</div>
</div>
</dd>
</dl>
</div>
<h1 id="title">QUIC-LB: Generating Routable QUIC Connection IDs</h1>
<section id="section-abstract">
<h2 id="abstract"><a href="#abstract" class="selfRef">Abstract</a></h2>
<p id="section-abstract-1">The QUIC protocol design is resistant to transparent packet inspection,
injection, and modification by intermediaries. However, the server can
explicitly cooperate with network services by agreeing to certain conventions
and/or sharing state with those services. This specification provides a
standardized means of solving three problems: (1) maintaining routability to
servers via a low-state load balancer even when the connection IDs in use
change; (2) explicit encoding of the connection ID length in all packets to
assist hardware accelerators; and (3) injection of QUIC Retry packets by an
anti-Denial-of-Service agent on behalf of the server.<a href="#section-abstract-1" class="pilcrow">¶</a></p>
</section>
<section class="note" id="section-note.1">
<h2 id="name-note-to-readers">
<a href="#name-note-to-readers" class="section-name selfRef">Note to Readers</a>
</h2>
<p id="section-note.1-1">Discussion of this document takes place on the
QUIC Working Group mailing list (quic@ietf.org),
which is archived at <a href="https://mailarchive.ietf.org/arch/browse/quic/">https://mailarchive.ietf.org/arch/browse/quic/</a>.<a href="#section-note.1-1" class="pilcrow">¶</a></p>
<p id="section-note.1-2">Source for this draft and an issue tracker can be found at
<a href="https://github.com/quicwg/load-balancers">https://github.com/quicwg/load-balancers</a>.<a href="#section-note.1-2" class="pilcrow">¶</a></p>
</section>
<div id="status-of-memo">
<section id="section-boilerplate.1">
<h2 id="name-status-of-this-memo">
<a href="#name-status-of-this-memo" class="section-name selfRef">Status of This Memo</a>
</h2>
<p id="section-boilerplate.1-1">
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.<a href="#section-boilerplate.1-1" class="pilcrow">¶</a></p>
<p id="section-boilerplate.1-2">
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 <span><a href="https://datatracker.ietf.org/drafts/current/">https://datatracker.ietf.org/drafts/current/</a></span>.<a href="#section-boilerplate.1-2" class="pilcrow">¶</a></p>
<p id="section-boilerplate.1-3">
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."<a href="#section-boilerplate.1-3" class="pilcrow">¶</a></p>
<p id="section-boilerplate.1-4">
This Internet-Draft will expire on 12 August 2022.<a href="#section-boilerplate.1-4" class="pilcrow">¶</a></p>
</section>
</div>
<div id="copyright">
<section id="section-boilerplate.2">
<h2 id="name-copyright-notice">
<a href="#name-copyright-notice" class="section-name selfRef">Copyright Notice</a>
</h2>
<p id="section-boilerplate.2-1">
Copyright (c) 2022 IETF Trust and the persons identified as the
document authors. All rights reserved.<a href="#section-boilerplate.2-1" class="pilcrow">¶</a></p>
<p id="section-boilerplate.2-2">
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(<span><a href="https://trustee.ietf.org/license-info">https://trustee.ietf.org/license-info</a></span>) 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 Revised BSD License text as described in
Section 4.e of the Trust Legal Provisions and are provided without
warranty as described in the Revised BSD License.<a href="#section-boilerplate.2-2" class="pilcrow">¶</a></p>
</section>
</div>
<div id="toc">
<section id="section-toc.1">
<a href="#" onclick="scroll(0,0)" class="toplink">▲</a><h2 id="name-table-of-contents">
<a href="#name-table-of-contents" class="section-name selfRef">Table of Contents</a>
</h2>
<nav class="toc"><ul class="compact toc ulBare ulEmpty">
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.1">
<p id="section-toc.1-1.1.1" class="keepWithNext"><a href="#section-1" class="xref">1</a>. <a href="#name-introduction" class="xref">Introduction</a></p>
<ul class="compact toc ulBare ulEmpty">
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.1.2.1">
<p id="section-toc.1-1.1.2.1.1" class="keepWithNext"><a href="#section-1.1" class="xref">1.1</a>. <a href="#name-terminology" class="xref">Terminology</a></p>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.1.2.2">
<p id="section-toc.1-1.1.2.2.1" class="keepWithNext"><a href="#section-1.2" class="xref">1.2</a>. <a href="#name-notation" class="xref">Notation</a></p>
</li>
</ul>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.2">
<p id="section-toc.1-1.2.1"><a href="#section-2" class="xref">2</a>. <a href="#name-protocol-objectives" class="xref">Protocol Objectives</a></p>
<ul class="compact toc ulBare ulEmpty">
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.2.2.1">
<p id="section-toc.1-1.2.2.1.1"><a href="#section-2.1" class="xref">2.1</a>. <a href="#name-simplicity" class="xref">Simplicity</a></p>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.2.2.2">
<p id="section-toc.1-1.2.2.2.1"><a href="#section-2.2" class="xref">2.2</a>. <a href="#name-security" class="xref">Security</a></p>
</li>
</ul>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.3">
<p id="section-toc.1-1.3.1"><a href="#section-3" class="xref">3</a>. <a href="#name-first-cid-octet" class="xref">First CID octet</a></p>
<ul class="compact toc ulBare ulEmpty">
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.3.2.1">
<p id="section-toc.1-1.3.2.1.1"><a href="#section-3.1" class="xref">3.1</a>. <a href="#name-config-rotation" class="xref">Config Rotation</a></p>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.3.2.2">
<p id="section-toc.1-1.3.2.2.1"><a href="#section-3.2" class="xref">3.2</a>. <a href="#name-configuration-failover" class="xref">Configuration Failover</a></p>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.3.2.3">
<p id="section-toc.1-1.3.2.3.1"><a href="#section-3.3" class="xref">3.3</a>. <a href="#name-length-self-description" class="xref">Length Self-Description</a></p>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.3.2.4">
<p id="section-toc.1-1.3.2.4.1"><a href="#section-3.4" class="xref">3.4</a>. <a href="#name-format" class="xref">Format</a></p>
</li>
</ul>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.4">
<p id="section-toc.1-1.4.1"><a href="#section-4" class="xref">4</a>. <a href="#name-load-balancing-preliminarie" class="xref">Load Balancing Preliminaries</a></p>
<ul class="compact toc ulBare ulEmpty">
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.4.2.1">
<p id="section-toc.1-1.4.2.1.1"><a href="#section-4.1" class="xref">4.1</a>. <a href="#name-unroutable-connection-ids" class="xref">Unroutable Connection IDs</a></p>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.4.2.2">
<p id="section-toc.1-1.4.2.2.1"><a href="#section-4.2" class="xref">4.2</a>. <a href="#name-fallback-algorithms" class="xref">Fallback Algorithms</a></p>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.4.2.3">
<p id="section-toc.1-1.4.2.3.1"><a href="#section-4.3" class="xref">4.3</a>. <a href="#name-server-id-allocation" class="xref">Server ID Allocation</a></p>
</li>
</ul>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.5">
<p id="section-toc.1-1.5.1"><a href="#section-5" class="xref">5</a>. <a href="#name-server-id-encoding-in-conne" class="xref">Server ID Encoding in Connection IDs</a></p>
<ul class="compact toc ulBare ulEmpty">
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.5.2.1">
<p id="section-toc.1-1.5.2.1.1"><a href="#section-5.1" class="xref">5.1</a>. <a href="#name-cid-format" class="xref">CID format</a></p>
</li>
<li class="compact toc ulBare ulEmpty" id="section-toc.1-1.5.2.2">