Configuration Guide (Supporting R2.2.0.0) Owner's manual

Brocade 6910 Ethernet Access Switch Configuration Guide 559
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CFM Commands
ethernet cfm delay-measure one-way
This command sends on-demand delay-measure information to a specified MEP, stamped with the
time of transmission.
Syntax
ethernet cfm delay-measure one-way [src-mep source-mpid] {dest-mep destination-mpid |
mac-address} md domain-name ma ma-name [count transmit-count] [interval interval]
[size packet-size]
source-mpid – The identifier of a source MEP that will send delay-measure messages.
(Range: 1-8191)
destination-mpid – The identifier of a remote MEP that is the target of the delay-measure
messages. (Range: 1-8191)
mac-address – MAC address of a remote MEP that is the target of the delay-measure
messages. This address can be entered in either of the following formats: xx-xx-xx-xx-xx-xx
or xxxxxxxxxxxx
domain-name – Domain name. (Range: 1-43 alphanumeric characters)
ma-name – Maintenance association name. (Range: 1-43 alphanumeric characters,
maximum length is 44 minus the length of the domain name)
count – The number of times to send a delay-measure message. (Range: 1-5)
interval – The interval between the transmission of delay-measure messages.
(Range: 1-5 seconds)
packet-size – The size of the delay-measure message. (Range: 64-1518 bytes)
Default Setting
Count: 5
Interval: 1 second
Packet Size: 64 bytes
Command Mode
Privileged Exec
Command Usage
• Both the source and destination MEP must be configured for the same MA before using this
command.
• Delay measurement can be used to measure frame delay and frame delay variation between
MEPs. In this case, each MEP sends frames with one-way delay-measure (DM) information to
its peer MEP to facilitate one-way frame delay and one-way frame delay variation
measurements.
• When one-way frame delay measurements are made, the transmitting MEP sends a frame with
DM request information with the TxTimeStampf (timestamp at the time of sending a frame with
DM request information). The receiving MEP can compare this value with the RxTimef, the time
at the reception of DM frame, and calculate the one-way frame delay as:
Frame Delay = RxTimef - TxTimeStampf