Chapter 13
| Basic Administration Protocols
Connectivity Fault Management
– 512 –
Transmitting
Delay-Measure
Requests
Use the Administration > CFM (Transmit Delay Measure) page to send periodic
delay-measure requests to a specified MEP within a maintenance association.
Command Usage
â—† Delay measurement can be used to measure frame delay and frame delay
variation between MEPs.
â—† A local MEP must be configured for the same MA before you can use this
function.
â—† 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.
â—† 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)
â—† 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.
Parameters
These parameters are displayed:
◆ MD Index – Domain index. (Range: 1-65535)
◆ MA Index – MA identifier. (Range: 1-2147483647)
◆ Source MEP ID – The identifier of a source MEP that will send the delay-
measure message. (Range: 1-8191)
â—† Target
â–
MEP ID – The identifier of a remote MEP that is the target of a delay-
measure message. (Range: 1-8191)
â–
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
◆ Count – The number of times to retry sending the message if no response is
received before the specified timeout. (Range: 1-5; Default: 5)
To Next Page
Loading...
Need help?
General