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micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-U+X90gUcMUldWoq1pO+9" MIME-Version: 1.0 X-OriginatorOrg: ericsson.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: HE1PR0702MB3772.eurprd07.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: e133244d-45ec-4572-d545-08d8b2edd39d X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Jan 2021 09:22:59.9265 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 92e84ceb-fbfd-47ab-be52-080c6b87953f X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 3Fg+9NJtK2YdUUer2o2LeAAuWirRpFt55v5gFYf5op4ZqYGydYdjKhMPFiQjVmnQMneXqqAdRWGLyjdwIpCRhxnybFRY8UlIARwtN4ictLU= X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1PR07MB3451 Archived-At: X-BeenThere: quic@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Main mailing list of the IETF QUIC working group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Jan 2021 09:23:06 -0000 --=-U+X90gUcMUldWoq1pO+9 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Eric, On Wed, 2021-01-06 at 15:01 +0000, Lucas Pardue wrote: > Hi =C3=89ric, >=20 > Thanks for the review. I've captured your comments as issues on the QUIC = WG > GItHub repository. Links to each are provided as in-line responses. >=20 > On Wed, Jan 6, 2021 at 1:31 PM =C3=89ric Vyncke via Datatracker > wrote: > > =C3=89ric Vyncke has entered the following ballot position for > > draft-ietf-quic-recovery-33: No Objection > >=20 > > When responding, please keep the subject line intact and reply to all > > email addresses included in the To and CC lines. (Feel free to cut this > > introductory paragraph, however.) > >=20 > >=20 > > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.ht= ml > > for more information about IESG DISCUSS and COMMENT positions. > >=20 > >=20 > > The document, along with other ballot positions, can be found here: > > https://datatracker.ietf.org/doc/draft-ietf-quic-recovery/ > >=20 > >=20 > >=20 > > ---------------------------------------------------------------------- > > COMMENT: > > ---------------------------------------------------------------------- > >=20 > >=20 > > =3D=3D COMMENTS =3D=3D > >=20 > > Does the QUIC WG intend to have a BCP-like document on how network devi= ces > > on > > the path should handle buffers? E.g., QUIC ressembles a lot to TCP so n= odes > > can > > apply back pressure with mechanisms similar to RED (but, AFAIK, RED is > > mainly > > applied to TCP traffic so not to QUIC/UDP). I thought the buffering and forwarding behaviors of the network devices is primarily an IP + DSCP dependent thing, not really taking the upper layer protocol into account. And for QUIC that identification chain where it is explicit stops with UDP. For a third party seeing an IP/UDP packets where t= he few bits that can be used to idenitify it as QUIC packet is no guarantee fo= r it being QUIC. If you are flow aware and happens to see the long header packet= s you might have higher confidencience that this is QUIC and not something else.= =20 But my perspective is that IP packet buffering has been done to what suits = TCP well with significant downside to other protocols being carried over IP unl= ess an DSCP has been used to request a different forwarding behavior and possib= ly thus a different buffering scheme.=20 However, I think the buffering and forwarding behavior should not be QUIC specific in anyway. I think it is also dependent on the applicaiton(s) bein= g run over QUIC. For example a background buld download service may use quic but = want to run in scavenger class and with a congestion control behavior that attem= pts to avoid building any queues (Ledbat style). While another application migh= t be a highly latency sensitive real-time applciation that would prefer L4S styl= e behavior and a corresponding congestion control.=20 Thus, I don't think it is on QUIC level we should define buffering and forwarding behaviors, they should be defined more for IP level so that it c= an be independent from the protocol.=20 Interested to determine if you have more input on these aspects?=20 Cheers Magnus --=-U+X90gUcMUldWoq1pO+9 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCErYw ggX0MIID3KADAgECAg8BdlE9InYZOYLl1zGep4IwDQYJKoZIhvcNAQELBQAwRzELMAkGA1UEBhMC U0UxETAPBgNVBAoMCEVyaWNzc29uMSUwIwYDVQQDDBxFcmljc3NvbiBOTCBJbmRpdmlkdWFsIENB IHYzMB4XDTIwMTIxMTA5NTg0OVoXDTIzMTIxMjA5NTg0OVowXjERMA8GA1UECgwIRXJpY3Nzb24x GjAYBgNVBAMMEU1hZ251cyBXZXN0ZXJsdW5kMS0wKwYJKoZIhvcNAQkBFh5tYWdudXMud2VzdGVy 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