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10.3.4 802.1ag/Y.1731 Connectivity Fault Management Functions
802.1ag/Y.1731 Functions supported are as listed:
Fault Detection – Continuity Check:
CCM "heartbeat" messages are transmitted at a configurable periodic interval by MEPs.
Network/Path Discovery – Link trace message:
Equivalent to a "traceroute" test. MIPs and MEPs along the path send a response.
Fault verification and isolation – Loopback:
Verify connectivity to a specific point in the message. Equivalent to "ping" test.
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10.3.5 Link Trace and Loopback Messages
Link Trace Messages (LTM/LTR)
LTM (Link Trace Message) Multicast messages are transmitted on demand to a destination MAC address. All MIPs and destination MEPs
respond with LTR (Link Trace Reply) and forward the LTM on to its destination.
LTM Diagram
Link Trace Message Format
TX130M+_e-manual_D07-00-051P_RevD00
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