Configuring Ethernet OAM Configuring Ethernet OAM
OmniSwitch AOS Release 7 Network Configuration Guide June 2013 page 35-13
One-Way ETH-DM
The ethoam one-way-delay command is used to configure a one-way ETH-DM (1DM) to monitor perfor-
mance between two MEPs. For example, the following command is used to initiate the transmission of
1DM frames to a target MEP:
-> ethoam one-way-delay target-endpoint 10 source-endpoint 12 domain MD1 associ-
ation MA1 vlan-priority 4
This command initiates the sending of 1DM frames from MEP 12 to MEP 10, which does not reply to
frames received from MEP 12. The latency and jitter statistics are gathered and stored on the receiving
MEP, which is MEP 10 in this example.
An option to specify a target MAC address, instead of a MEP ID, is also supported. For example:
-> ethoam one-way-delay target-macaddress 00:e0:b1:6a:52:4c source-endpoint 12
domain MD association MA vlan-priority 4
One-way delay measurement statistics are gathered and stored on the receiving MEP (the MEP that
receives a 1DM request).
Note. One-way ETH-DM requires clock synchronization between the sending and receiving MEPs. Using
NTP for clock synchronization is recommended.
Two-Way ETH-DM
The ethoam two-way-delay command is used to configure a two-way ETH-DM to monitor roundtrip
performance between two MEPs. For example, the following command is used to initiate the transmission
of delay measurement message (DMM) frames to a target MEP:
-> ethoam two-way-delay target-endpoint 10 source-endpoint 12 domain MD associa-
tion MA vlan-priority 4
Reply from 00:0E:B1:6B:43:89 delay=2584us jitter=282us
This command initiates the sending of DMM frames from MEP 12 to MEP 10. However, with two-way
delay measurement, the receiving MEP replies with delay message response (DMR) frames to the sending
MEP. In this example, MEP 10 sends DMR frames back to MEP 12.
An option to specify a target MAC address, instead of a MEP ID, is also supported. For example:
-> ethoam two-way-delay target-macaddress 00:e0:b1:6a:52:4c source-endpoint 12
domain MD association MA vlan-priority 4
Reply form 00:E0:B1:6A:52:4C: delay=2584us jitter=282us
Note the following when configuring two-way ETH-DM:
• Two-way delay measurement statistics are gathered and stored on the originating MEP (the MEP that
initiates a DMM request).
• This method does not require clock synchronization between the transmitting and receiving MEPs.
• Two-way ETH-DM is an on-demand OAM performance measurement. To schedule continuous two-
way delay measurement, see Chapter 36, “Configuring Service Assurance Agent,” for more informa-
tion.
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