[通信技术与资料] G8113英文版资料.pdfVIP

INTERNATIONAL TELECOMMUNICATION UNION COM 15 – R 22 – E TELECOMMUNICATION May 2011 STANDARDIZATION SECTOR STUDY PERIOD 2009-2012 Original: English Question(s): All/15 STUDY GROUP 15 – REPORT 22 Source: Study Group 15 Title: Determined Recommendation ITU-T G.8113.1 Operations, Administration and Maintenance mechanism for MPLS-TP in Packet Transport Network (PTN) ITU-T Study Group 15, at its plenary on 25 February 2011 DETERMINED Recommendation ITU-T G.8113.1, Operations, Administration and Maintenance mechanism for MPLS-TP in Packet Transport Network (PTN) The DETERMINED text of this draft revised recommendation is reproduced hereafter. The versions in other languages will be posted on the SG 15 website as soon as they are available. Summary Recommendation ITU-T G.8113.1 specifies mechanisms for user-plane Operations, Administration and Maintenance (OAM) in MPLS-TP networks to meet the MPLS-TP OAM requirements defined in [IETF RFC 5860]. It also specifies the MPLS-TP OAM packet formats, syntax and semantics of MPLS-TP OAM packet fields. The OAM mechanisms defined in this Recommendation assume common forwarding of the MPLS- TP user packets and MPLS-TP OAM packets. In transport networks, the OAM return path is always in band. The MPLS-TP OAM mechanisms as described in this Recommendation apply to co-routed bidirectional point-to-point MPLS-TP connections. Unidirectional point-to-point and point-to- multipoint MPLS-TP connections will be addressed in a future version of this Recommendation. The MPLS-TP OAM mechanisms as described in this Recommendation apply to co-routed bidirectional point-to-point MPLS-TP connections. Unidire