Re: [quicwg/base-drafts] ECN verification text (#2752)

mirjak <> Wed, 07 August 2019 07:57 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 1FD6C120333 for <>; Wed, 7 Aug 2019 00:57:58 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -7.999
X-Spam-Status: No, score=-7.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_IMAGE_ONLY_32=0.001, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: (amavisd-new); dkim=pass (1024-bit key)
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id oIMMxiigr8It for <>; Wed, 7 Aug 2019 00:57:56 -0700 (PDT)
Received: from ( []) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id A3C2E12067E for <>; Wed, 7 Aug 2019 00:57:55 -0700 (PDT)
Date: Wed, 07 Aug 2019 00:57:54 -0700
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=pf2014; t=1565164674; bh=lue1Nj7AINHOe7zn8qEjoCuwtYReKMtBFxXZik+ojFM=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=fM0s3fQ6WtgEHBUqTQV8PO+Mc9DCglubTVWxX9ybVXjWZj7uyUjYqCpTj2UF2SBVb M3p9QbUUY2b1ACTrkYGt6DLRSZtPqMTvVS6kzMr2g1zXS+Mredvr0YiaDw+al6mKqj /NyRWfRCWLcZ7miEECrGTxlzhAe1JHpHnhfYKh/8=
From: mirjak <>
Reply-To: quicwg/base-drafts <>
To: quicwg/base-drafts <>
Cc: Subscribed <>
Message-ID: <quicwg/base-drafts/pull/2752/review/>
In-Reply-To: <quicwg/base-drafts/pull/>
References: <quicwg/base-drafts/pull/>
Subject: Re: [quicwg/base-drafts] ECN verification text (#2752)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5d4a8482ce329_24d63f98974cd960216472"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: mirjak
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
Archived-At: <>
X-Mailman-Version: 2.1.29
List-Id: Notification list for GitHub issues related to the QUIC WG <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Wed, 07 Aug 2019 07:57:58 -0000

mirjak commented on this pull request.

> -setting ECT codepoints in subsequent packets.  Doing so allows the connection to
-be resilient to network elements that corrupt ECN codepoints in the IP header or
-drop packets with ECT or CE codepoints in the IP header.
+#### Validation Outcomes
+If validation fails, then the endpoint stops sending ECN markings in subsequent
+IP packets with the expectation that either the network path or the peer does
+not support ECN.
+Upon successful validation, an endpoint can continue to set ECT codepoints in
+subsequent packets with the expectation that the path is ECN-capable.  Network
+routing and path elements can change mid-connection however; an endpoint MUST
+disable ECN if validation fails at any point in the connection.
+Even if validation fails, an endpoint MAY re-validate ECN on the same path to
+the peer at any later time in the connection.

Okay, then you should say revalidation but maybe remark actually exactly this, that validation is performed on a per-path basis and has do be performed when a path change is detected.

You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub: