Baseline Encoding and Transport of Pre-Congestion Information
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From: The IESG <firstname.lastname@example.org> To: IETF-Announce <email@example.com> Cc: Internet Architecture Board <firstname.lastname@example.org>, RFC Editor <email@example.com>, pcn mailing list <firstname.lastname@example.org>, pcn chair <email@example.com> Subject: Protocol Action: 'Baseline Encoding and Transport of Pre-Congestion Information' to Proposed Standard The IESG has approved the following document: - 'Baseline Encoding and Transport of Pre-Congestion Information ' <draft-ietf-pcn-baseline-encoding-07.txt> as a Proposed Standard This document is the product of the Congestion and Pre-Congestion Notification Working Group. The IESG contact persons are Lars Eggert and Magnus Westerlund. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-pcn-baseline-encoding-07.txt
Technical Summary This document specifies a baseline encoding for pre-congestion notification states in a PCN domain. The baseline encoding assumes that the ECN bits in the IP header can be used to encode two PCN states ("Not-marked", "PCN-marked") for packets belonging to certain Diffserv behavior aggregates. The PCN-compatible Diffserv codepoints are not specified, and are assumed to be configurable on a domain basis. It is assumed that normal ECN behavior is not available for packets within these behavior aggregates; however, the encoding allows packets in these behavior aggregates to be marked as "Not-PCN". The proposed alternative semantics of the ECN bits is consistent with the rules specified in RFC 4774. Working Group Summary The proposed encoding is the product of substantial discussion within group. Personnel The document shepherd was Steven Blake (firstname.lastname@example.org). Lars Eggert (email@example.com) reviewed the document for the IESG.