The IESG has approved the following document: - 'Packet Pseudowire Encapsulation over an MPLS PSN' (draft-ietf-pwe3-packet-pw-04.txt) as Proposed Standard This document is the product of the Pseudowire Emulation Edge to Edge Working Group. The IESG contact persons are Adrian Farrel and Stewart Bryant. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-ietf-pwe3-packet-pw/ Technical Summary This document describes a pseudowire mechanism that is used to transport a packet service over an MPLS PSN is the case where the client LSR and the server PE are co-resident in the same equipment. This pseudowire mechanism may be used to carry all of the required layer 2 and layer 3 protocols between the pair of client LSRs. Working Group Summary This draft presents a number of alternative encapsulations for a generic packet PW that were investigated by the authors and discussed in the WG over a period of time (these are documented in the appendix), and reaches a conclusion about which one to use. However, an alternative approach was also proposed to the PWE3 working group by a different set of authors in a separate draft, and progressed over a period of a number of IETFs. A consensus call was conducted by the chairs to try to reach agreement on how to proceed. This resulted in the Ethernet PW encapsulation approach, specified in this document, being adopted. WG consensus on the alternative approach could not be reached at that time. Since this draft documents a new way to use an existing encapsulation, the draft was originally progressed as a BCP rather than on the standards track. However, it was subsequently noted in AD review that the document contains protocol definitions and makes IANA requests, and therefore it is now proposed on the standards track. Document Quality The draft uses an existing Ethernet PW type that is widely deployed. As well as being used for interconnecting Ethernet attachment circuits, there are implementations that directly terminate the Ethernet PW on an IP interface (e.g., on a VRF) which represents a subset of the proposal in the draft. However, direct termination on an LSR, as shown in the draft, is not known to be widely implemented/deployed yet, although such as model has been requested by service providers. Personnel Matthew Bocci (Matthew.Bocci@alcatel-lucent.com) is the Document Shepherd Adrian Farrel (adrian@olddog.co.uk) is the Responsible AD
