The IESG has approved the following document: - 'Multicast Protocol for Low power and Lossy Networks (MPL)' (draft-ietf-roll-trickle-mcast-12.txt) as Proposed Standard This document is the product of the Routing Over Low power and Lossy networks Working Group. The IESG contact persons are Alvaro Retana, Alia Atlas and Deborah Brungard. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-roll-trickle-mcast/ Technical Summary This document specifies the Multicast Protocol for Low power and Lossy Networks (MPL) that provides IPv6 multicast forwarding in constrained networks. MPL avoids the need to construct or maintain any multicast forwarding topology, disseminating messages to all MPL Forwarders in an MPL Domain. MPL uses the Trickle algorithm to manage message transmissions for both control and data-plane messages. Different Trickle parameter configurations allow MPL to trade between dissemination latency and transmission efficiency. Working Group Summary This document had a somewhat lumpy late stage process. It was submitted for AD review and IETF last call was started, but then a significant issue was spotted, last call was abandoned, and the document was sent back to the working group. After discussion and work a new revision was now presented with working group consensus. IETF last call raised a few small issues that were worked on the WG mailing list. It also produced an extensive review that was sent privately to the AD with a request that it remain private. This review took considerable effort to managed and close down. Note that early allocation of a codepoint was made to enable reference to this work by the ZigBee Alliance. Please note the IANA Note, below, for additional comments about early allocation. Document Quality There are existing implementations of this specification. Personnel Ines Robles is the Document Shepherd. Alvaro Retana is the Responsible Area Director. IANA Note Please note that an early allocation was made from the "Destination Options and Hop-by-Hop Options" registry in accordance with Section 13.1 of this I-D. However, the value requested in this I-D is different from the one allocated. Currently allocated 0x4D 01 0 01101 Trickle Multicast Option [draft-ietf-roll-trickle-mcast] To be allocated 0x6D 01 1 01101 MPL Option [draft-ietf-roll-trickle-mcast] The value 0x4D is no longer required for this document, however, it is suggested that IANA will want to mark 0x4D so that it cannot be re-allocated. --- Please also note that IANA has made an early allocation for the IPv6 multicast address as requested in Section 13.3 of this I-D. The value allocated can stand.
