Eth-Cfm Ethernet Oam Tests - Alcatel-Lucent 7705 Service Manual

ETH-CFM (802.1ag and Y.1731)

ETH-CFM Ethernet OAM Tests

This section describes Ethernet OAM tests for ETH-CFM on the 7705 SAR, including:
Loopback (LB)
The loopback function is supported by 802.1ag and Y.1731 on the 7705 SAR. A Loopback
Message (LBM) is generated by a MEP to its peer MEP. Both dot1ag and dot3ah loopbacks
are supported. The loopback function is similar to IP or MPLS ping in that it verifies
Ethernet connectivity between the nodes on a per-request basis. That is, it is non-periodic
and is only initiated by a user request.
In
7750 SR (source) and 7705 SAR (target) over an Epipe. The 7750 SR-generated LBM is
switched to the 7705 SAR, where the LBM message is processed. Once the 7705 SAR
generates the Loopback Reply message (LBR), the LBR is switched over the Ethernet PW to
the 7750 SR.
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• loopbacks
• linktrace
• throughput measurement
• continuity check
• remote defect indication
• alarm indication signal
• Ethernet (signal) test
Figure 13, the line labeled LB represents the dot1ag loopback message between the
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