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Displaying Ethernet Frame Delay Statistics

Before Ethernet frame delay measurement statistics can be displayed, they must be collected. To trigger Ethernet frame delay measurement, use the monitor ethernet delay-measurement (one-way | two-way) (remote-mac-address | mep identifier) maintenance-domain name maintenance-association ma-id [count count] [wait time] operational command.

The fields for this command are described in Table 4.

Table 4: Monitor Ethernet Delay Command Parameters

Parameter	Parameter Range	Description
one-way or two-way	NA	Perform a one-way or two-way (round-trip) delay measurement.
remote-mac-address	Unicast MAC address	Send delay measurement frames to the destination unicast MAC address (use the format xx:xx:xx:xx:xx:xx). Multicast MAC addresses are not supported.
mep identifier	1–8191	The MEP identifier to use for the measurement. The discovered MAC address for this MEP identifier is used.
maintenance-domain name	Existing MD name	Specifies an existing maintenance domain (MD) to use for the measurement.
maintenance-association ma-id	Existing MA identifier	Specifies an existing maintenance association (MA) identifier to use for the measurement.
count count	1–65535 (default: 10)	(Optional) Specifies the number of Ethernet frame delay frames to send. The default is 10.
wait time	1–255 seconds (default: 1)	(Optional) Specifies the number of seconds to wait between frames. The default is 1 second.

If you attempt to monitor delays to a nonexistent MAC address, you must exit the application manually:

user@host> monitor ethernet delay-measurement
                  two-way 00:11:22:33:44:55

Two-way ETH-DM request to 00:11:22:33:44:55, Interface ge-5/2/9.0
^C
--- Delay measurement statistics ---
Packets transmitted: 10, Valid packets received: 0
Average delay: 0 usec, Average delay variation: 0 usec
Best case delay: 0 usec, Worst case delay: 0 usec

To retrieve the last 100 Ethernet frame delay measurement statistics per remote MEP or per CFM session, two types of show commands are provided:

For all OAM frame counters and Ethernet frame delay measurement statistics
For Ethernet frame delay measurement statistics only

To retrieve all Ethernet frame delay measurement statistics for a given session, use the show oam ethernet connectivity-fault-management mep-statistics maintenance-domain name maintenance-association name [local-mep identifier] [remote-mep identifier] [count count] command.

To retrieve only Ethernet frame delay measurement statistics for a given session, use the show oam ethernet connectivity-fault-management delay-statistics maintenance-domain name maintenance-association name [local-mep identifier] [remote-mep identifier] [count count] command.

Note: The only difference in the two commands is the use of the mep-statistics and delay-statistics keyword.

The fields for these commands are described in Table 5.

Table 5: Show Ethernet Delay Command Parameters

Parameter	Parameter Range	Description
maintenance-domain name	Existing MD name	Specifies an existing maintenance domain (MD) to use.
maintenance-association ma-id	Existing MA identifier	Specifies an existing maintenance association (MA) identifier to use.
local-mep identifier	1–8191	When a MEP has been specified, display statistics only for the local MEP.
remote-mep identifier	1–8191	When a MEP has been specified, display statistics only for the discovered MEP.
count count	1–100 (default:100)	The number of entries to display in the results table. By default, all 100 entries are displayed if they exist.

Note: For each MEP, you will see frame counters for sent and received Ethernet frame delay measurement frames whenever MEP statistics are displayed.

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