The Ethernet Test (signal) function (ETH-Test) is a Y.1731 CFM enhancement used to perform one-way, on-demand, in-service diagnostics tests, which include verifying frame loss and bit errors. ETH-Test is supported on Y.1731 SAP MEPs and facility MEPs on network interfaces.
ETH-Test is enabled using the eth-cfm>mep>eth-test-enable command for Epipe and VPLS services and for router network interfaces and is run using the oam>eth-cfm>eth-test command.
The out-of-service diagnostics test is not supported on the 7705 SAR.
When configured to perform such tests, a MEP inserts frames with ETH-Test information such as frame size and transmission patterns.
When an in-service ETH-Test function is performed, data traffic is not disrupted and the frames with ETH-Test information are transmitted.
To support ETH-Test, a Y.1731 SAP or facility MEP requires the following configuration information:
MEG level — the MEG level at which the MEP exists
unicast MAC address — the unicast MAC address of the peer MEP for which the ETH-Test is intended
data — an optional element with which to configure data length and contents for the MEP. The contents can be a test pattern and an optional checksum.
Examples of test patterns include all 0s or all 1s. At the transmitting MEP, this configuration information is required for a test signal generator that is associated with the MEP. At the receiving MEP, this configuration is required for a test signal detector that is associated with the MEP.
priority — the priority of frames with ETH-Test information
A MEP inserts frames with ETH-Test information toward a targeted peer MEP. The receiving MEP detects the frames with ETH-Test information and performs the requested measurements.