The IESG has approved the following document: - 'PCN Boundary Node Behaviour for the Single Marking (SM) Mode of Operation' (draft-ietf-pcn-sm-edge-behaviour-12.txt) as an Experimental RFC This document is the product of the Congestion and Pre-Congestion Notification Working Group. The IESG contact persons are Martin Stiemerling and Wesley Eddy. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-ietf-pcn-sm-edge-behaviour/ Technical Summary This document describes a possible boundary node behaviour for a PCN-domain (as defined in RFC 5559), known informally as the Single Marking (SM) PCN-boundary-node behaviour. The behaviour described here is a form of measurement-based load control using two PCN marking states: not-marked, and excess-traffic-marked. Working Group Summary The document was subject to thorough review by the PCN working group, and strong consensus for publication was reached. The area director required substantial re-write of the document to address a lack of operations and management considerations. IETF Last Call raised an issue about the lack of any standardized signaling protocol between the egress and ingress nodes. Subsequent work by the WG on one possible signaling protocol (RSVP) was developed, but this protocol required an extension to RSVP. This protocol work item was transferred from the PCN WG charter to the TSVWG WG charter where most RSVP experts are active. The document required a re-write to discuss operational considerations for signaling protocols, and a suggestion that the RSVP extension would be suitable in RSVP environments. The logging description used enterprise-specific structured data rather than standardized structured data, and the area director recommended this be changed, which it was. A second WGLC and a second IETF Last Call were performed, given the extensive modifications to the document. Document Quality There are existing implementations of the protocol, and the document cites research that has been done measuring the performance of this approach. The document has been reviewed by the OPSDIR The document has been reviewed by the SECDIR. No problems were identified. Personnel Document Shepherd: Steven Blake, PCN co-chair <slblake@petri-meat.com> Responsible Area Director: Martin Stiemerling
