连续性检测和连通性验证(CC/CV)
CV (Connectivity Verification)
Behaviour
It is a pro-active OAM function running at a configured polling rate (3.3.ms10 min) between any pair of MEPs in a MEG. MEPs are identified by MEG ID, MEP ID (TTSI)
PW TCM LABEL G-ACH MPLS OAM PDU
PW
PW LABEL
G-ACH
MPLS OAM PDU
LSP TCM
LSP TCM LABEL path LSP LABEL path
4 bytes
GAL
G-ACH
MPLS OAM PDU
LSP
GAL
G-ACH
MPLS OAM PDU
GAL
R
Chan.
T R
CV CV
T R T R
Purpose MEP
T
CV CV CV CV
R T T R R T T R
Path
R T R T
Fault management (1 sec) Continuity supervision [LOC]
Connectivity supervision [MMG, UNM, DEG] OAM Protocol supervision [UNP, UNPhB] Remote Integrity [RDI] Performance monitoring (100 ms) Near End & Far End Packet Loss, Packet Loss Ratio, Degrade primitives [Near End & Far End Tx/Rx packet counting] Naer End & far End Defect Second primitives [Defects from fault management]