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MPLS-TP OAM based on Y.1731 Italo Busi (Editor) Huub van Helvoort (Editor) Jia He (Editor)

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Presentation on theme: "MPLS-TP OAM based on Y.1731 Italo Busi (Editor) Huub van Helvoort (Editor) Jia He (Editor)"— Presentation transcript:

1 MPLS-TP OAM based on Y.1731 Italo Busi (Editor) Huub van Helvoort (Editor) Jia He (Editor)

2 Current contributors Christian Addeo (Alcatel-Lucent), Simon Delord (Uecomm), John Hoffmans (KPN), Ruiquan Jing (China Telecom), Julien Meuric (France Telecom), Philippe Niger (France Telecom), Manuel Paul (Deutsche Telekom), Josef Roese (Deutsche Telekom), Vincenzo Sestito (Alcatel-Lucent), Nurit Sprecher (Nokia Siemens Networks), Yaakov Stein (RAD), Yuji Tochio (Fujitsu), Munefumi Tsurusawa (KDDI R&D Labs), Maarten Vissers (Huawei), Yaacov Weingarten (Nokia Siemens Networks)

3 Scope ITU-T Recommendation Y.1731 specifies: –OAM PDUs and procedures (state machines) that meet the transport networks requirements for OAM –Encapsulation mechanisms to carry these OAM PDUs within Ethernet frames to provide Ethernet OAM capabilities in Ethernet networks Proposal is to capitalize on the technology- independent OAM PDUs and procedures of Y.1731 within MPLS-TP to monitor MPLS-TP LSP, PW (any PW type) and Sections This is NOT Ethernet centric/focused

4 Advantages of the approach Reuse existing mechanisms –Availability of MPLS-TP OAM functions in the near terms, since these OAM functions are already supported and deployed –Reduce the complexity and increase the reuse of code for implementation in packet transport devices that may support both VPLS and MPLS-TP capabilities –Operational benefit of reusing the same OAM protocols in LSP, PW and VPLS (i.e. the operator has to test and maintain a single protocol set rather than two)

5 Relationship IEEE 802.1ag –IEEE 802.1ag and ITU-T Y.1731 have been developed in cooperation by IEEE and ITU –IEEE 802.1ag applicable to enterprise networks –ITU-T Y.1731 applicable to transport networks Other MPLS and PW OAM mechanisms –No deprecation of existing MPLS and PW OAM mechanisms –No preclusion to define other MPLS-TP OAM tools

6 Encapsulation Option 1 One ACH codepoint identifies Y.1731 OAM PDU and OpCode identifies the specific PDU | | | | Y.1731 Channel Type (0xXX) | | MEL | Version | OpCode | Flags | TLV Offset | | | + + | OAM function specific fields | | (Y.1731 based) | + + :... : | |

7 Encapsulation Option 2 The ACH codepoint identifies the specific PDU | | | | Channel Type | | MEL | Version | OpCode | Flags | TLV Offset | | | + + | OAM function specific fields | | (Y.1731 based) | + + :... : | |

8 OAM Mechanisms and Requirements CCM –Proactive CC & CV –Proactive remote defect indication –Proactive loss measurement LBM/LBR –On-demand CC & CV –Bidirectional diagnostic test (in-service and out-of-service)

9 OAM Mechanisms and Requirements TST –Unidirectional diagnostic test (in-service and out-of-service) AIS –Alarm suppression in case of server failures LCK –Alarm suppression in case of server administratively locked

10 OAM Mechanisms and Requirements LMM/LMR –On-demand (and pro-active) packet loss measurement DMM/DMR –On-demand (and pro-active) 2-ways delay measurement 1DM –On-demand (and pro-active) 1-way delay measurement

11 What is NOT proposed VSM/VSR and EXM/EXR –Experimental code-points defined in draft-ietf-gach-gal must be used instead MCC –The solution in draft-beller-mpls-tp-gach-dcn should be used instead LTM/LTR –Not applicable to MPLS-TP because it addresses an Ethernet specific function to test the MAC filtering rule

12 Open Issues Applicability to IP/MPLS –Is ACH TLV sufficient? –Do we need an IP-based encapsulation? Encoding of Target MEP/MIP ID in LBM –Use of ACH TLV? –Use of LBM TLV (within LBM PDU)? Clarify relationship with other MPLS-TP OAM solution drafts

13 Next Steps Complete the OAM mechanisms description Close the open issue Address comments from the WG(s)


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