LevelOne GTL-2691 - Manual (Page 498)

C HAPTER 14 | Basic Administration Protocols
Connectivity Fault Management
– 498 –
T RANSMITTING D ELAY -
M EASURE R EQUESTS
Use the Administration > CFM (Transmit Delay Measure) page to send
periodic delay-measure requests to a specified MEP within a maintenance
association.
CLI R EFERENCES
◆ "ethernet cfm delay-measure two-way" on page 1348
C OMMAND U SAGE
◆ Delay measurement can be used to measure frame delay and frame
delay variation between MEPs.
◆ A local MEP must be configured for the same MA before you can use
this function.
◆ If a MEP is enabled to generate frames with delay measurement (DM)
information, it periodically sends DM frames to its peer MEP in the same
MA., and expects to receive DM frames back from it.
◆ Frame delay measurement can be made only for two-way
measurements, where the MEP transmits a frame with DM request
information with the TxTimeStampf (Timestamp at the time of sending
a frame with DM request information), and the receiving MEP responds
with a frame with DM reply information with TxTimeStampf copied from
the DM request information, RxTimeStampf (Timestamp at the time of
receiving a frame with DM request information), and TxTimeStampb
(Timestamp at the time of transmitting a frame with DM reply
information):
Frame Delay = (RxTimeStampb-TxTimeStampf)-(TxTimeStampb-
RxTimeStampf)
◆ The MEP can also make two-way frame delay variation measurements
based on its ability to calculate the difference between two subsequent
two-way frame delay measurements.
P ARAMETERS
These parameters are displayed:
◆ MD Index – Domain index. (Range: 1-65535)
◆ MA Index – MA identifier. (Range: 0-4094)
◆ Source MEP ID – The identifier of a source MEP that will send the
delay-measure message. (Range: 1-8191)
◆ Target
■
MEP ID – The identifier of a remote MEP that is the target of a
delay-measure message. (Range: 1-8191)
■
MAC Address – MAC address of a remote MEP that is the target of
a delay-measure message. This address can be entered in either of
the following formats: xx-xx-xx-xx-xx-xx or xxxxxxxxxxxx