VeEX VePAL TX300M, User Manual

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Loss Measurement (LMM/LMR) (Y.1731 Only)
Delay Measurement (DMM/DMR) (Y.1731 Only)
General Setup
To run any 802.1ag/Y.1731 Tests, fill out the listed parameters and press
Start
. In the case of
CCM
, select
Enable
from the drop-
down menu to run that test. Details on individual test parameters will be listed in the specified section.
802.1ag/Y.1731 Connectivity Fault Management Functions
802.1ag/Y.1731 Connectivity Fault Management Functions
supported by the TX300/e are as listed:
Fault Detection – Continuity Check:
CCM "heartbeat" messages are transmitted at a configurable periodic interval by MEPs.
Network/Path Discovery – Link trace message:
Equivalent to a traceroute test. MIPs and MEPs along the path send a response.
Fault verification and isolation – Loopback:
Verify connectivity to a specific point in the message. Equivalent to ping test.
Continuity Check Messages (CCM)
CCM Messages are multicast messages sent from MEP to MEP at configurable intervals. Loss of continuity is detected after no CCM
is received for 3.5 times the CCM interval.
Note
: There can be 4,094 VLANs per port and up to eight maintenance levels. This yields a worst case CCM transmission rate of 9.8
million CCMs per second if 3.3ms interval is used.
Continuity Check Message (CCM)
RDI Flags added in CCM Messages indicates loss of continuity in the remote direction.
CCM Message Format
Service Level OAM (Page 1)
TX300S_e-manual_D07-00-064P_RevA00