Ethernet Operation, Administration and Management 802.1ag CFM
RMEPs - a list of up to five remote MEPs (in the MA) is displayed. Basic information on
each MEP is provided in the displayed table.
Table 49: RMEP Control options
Show more information on a selected RMEP.
Refresh the RMEP discovery process.
Ping a selected RMEP according to the parameters defined in the invoked dialog.
Trace the path to a selected RMEP according to the parameters defined in the
invoked dialog.
CFM Loopback
CFM loopback can be used by the operator to verify connectivity (ping). The test consists of
Unicast frames transmitted by a MEP at administrator request to verify connectivity to a
particular maintenance point, indicating if a destination is reachable.
A CFM loopback message is similar to an Internet Control Message Protocol (ICMP) ping
message; however, the CFM loopback message cannot pass through L3 switching (Routers)
devices, making the operation relevant only for L2 switching (Bridges) network.
NOTE: CFM loopback is dedicated for connectivity fault isolation and for SLA performance
monitoring
The Waiting interval between two loopback messages transmitted in series is set to 1 sec and
the timeout to report loopback failure is set to 5 sec. These options are not configurable.
Other attributes such as number of messages sequentially sent, length of data, etc. are user
configurable.
A total of 10 Loopback operations can be simultaneously executed from the same NE.
To configure and run CFM Loopback
1. In the Network Element tree, under Service CFM, select the relevant MEP. The MEP
pane is invoked.
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