NGN OAM Capabilities

Transcription

1 Internatinal Telecmmunicatin Unin ITU-T NGN OAM Capabilities Dinesh Mhan CTO Sr. Advisr, Nrtel Kbe, April 2006

2 NGN OAM Activities Update ITU-T NGN related activities are prgressing Y.2001 and Y.2011 specify the verview, principles and reference mdels fr NGN draft Y.NGN-FRA specifies NGN Functinal Requirements and Architecture Initial NGN OAM requirements have been identified in draft Y.NGN-R1-Reqts Kbe, April

3 NGN Basic Reference Mdel Cntrl plane User plane Management plane NGN service stratum Cntrl plane User plane Management plane NGN transprt stratum Y.2011/Figure 2: NGN Basic Reference Mdel Transprt and Service stratum independence is a key feature f NGN NGN OAM capabilities need t address bth transprt and service management Kbe, April

4 What is OAM? Service Management & Netwrk Management (FCAPS) NEs & Netwrks N S <-> E <-> W OAM = Operatins, Administratin & Maintenance FCAPS = Fault, Cnfiguratin, Accunting, Perfrmance & Security E <->W OAM functinality is guided by N <-> S OAM requirements t supprt Netwrk/Service Management Kbe, April

5 Why is OAM critical? ITU-T Custmer Dmain Service Prvider Dmain Operatr A Operatr B Operatr C Multiple rles are invlved Service Prvider cntracts with Operatrs fr facilities Custmer cntracts with Service Prvider fr services OAM is prbably nt needed when n faults ccur and everyne is happy Hwever, each rle is required t fulfill cntract Accuntable fr cmpliance Must reduce Opex when things g wrng Kbe, April

6 OAM Layering ITU-T Services Service Stratum OAM Transprt Transprt Stratum OAM PHY Links Ethernet link OAM SONET Link OAM Other Link OAM Principle Each layer must supprt OAM capabilities independently OAM Layers are iterative Interwrking is pssible t utilize OAM functinality acrss different layers (e.g. fault ntificatin) Kbe, April

7 NGN OAM Principles Mdularity User ught t be able t decide OAM functinality deplyed Security OAM frames frm ne dmain shuld nt leak int ther dmain Each dmain shuld be able t cntrl access t ther dmains Cngruency OAM frames shuld traverse the same path as data frames Accuntability Each OAM dmain is independently respnsible fr its mnitring Independence OAM in each stratum shuld be independent f OAM ther stratum OAM shuld be independent f Cntrl plane Backward Cmpatibility NEs nt supprting OAM shuld nt adversely effect OAM Kbe, April

8 NGN OAM Functins OAM Functins fr Fault Management Fault Detectin Fault Verificatin Fault Islatin Fault Ntificatin Prtectin Switching OAM Functins fr Perfrmance Mnitring Frame Lss Measurement Frame Delay Measurement Frame Delay Variatin Measurement Other OAM Functins Discvery Diagnstics Maintenance Channel Kbe, April

9 Ethernet OAM (NGN OAM enabler) Ethernet is a key technlgy in NGN Ethernet has mved in prvider/carrier space Ethernet Services (E-Line, E-LAN, etc) are being ffered tday Lts f standardizatin activities in IEEE 802, ITU-T, MEF, etc. Different Ethernet technlgies are being discussed Layer 2 Netwrking Prvider Bridges (PB) Prvider Backbne Bridges (PBB) Prvider Backbne Transprt (PBT) Link Layer: 802.3, RPR, GFP Physical: Ethernet OAM, being defined in Y.1731 and IEEE 802.1ag, is a gd example f hw NGN OAM capabilities are being realized Kbe, April

10 Fault Management Fault Management is abut detecting defects and verifying, lcalizing, ntifying the failures Fault restratin is a fllw-up actin Defects detected via OAM Lss f Cntinuity Miscnnectins Server failures Ethernet OAM Functins fr Fault Management Fault Detectin Fault Verificatin Fault Islatin Fault Ntificatin Prtectin Switching CCM LBM/LBR LTM/LTR AIS, CCM (with RDI), LCK APS Kbe, April

11 Perfrmance Mnitring Perfrmance Mnitring is abut measuring perfrmance parameters t determine QS, cnfrmance t SLAs, etc. Frame Lss Rati Frame Delay Frame Delay Variatin Availability Current fcus f OAM functins has been PM fr p2p mp and p2mp/mp2p wrk is getting started Ethernet OAM Functins fr Perfrmance Mnitring Frame Lss Frame Delay LMM/LMR, CCM (with LM) 1DM, DMM/DMR Kbe, April

12 Discvery Discver peer MEPs Adjacency Retrieval Other OAM Functins Multicast LBM/LBR ETH-LT Diagnstics: Out-f-service and in-service t test line rate, PRBS patters, etc. Bidirectinal Unidirectinal LBM/LBR TST Maintenance Channel Remte Management MCC Kbe, April

13 Ethernet OAM Standardizatin ITU-T Y.1731 Being dne in Q.5 SG13 Scpe is Fault Management and Perfrmance Mnitring Dcument cnsented in Jan 06 Last Call cmments reslutin is being carried ut IEEE 802.1ag Amendment t IEEE 802.1Q Scpe is limited t Fault Management (CCM, LBM/LBR, LTM/LTR) Expected timeline: 1Q07 fr Spnsr Ballt Kbe, April

14 Cnclusin ITU-T NGN related activities are prgressing well with current standardizatin fcus NGN OAM capabilities are identified based n service and transprt stratum management expectatins Key NGN enablers are already being standardized e.g. Carrier Ethernet Ethernet OAM meets the NGN OAM capability requirements Kbe, April

15 Kbe, April