AAxeon FCU-2802SC, Руководство пользователя

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If the connection breaks, the FCU-280x link loss forwards to the
switch/hub that generates a trap to the management station.
The administrator can then determine the source of the issue.
Media
Converter
Management
Station
Switch/Hub
w/SNMP
Management
Station
Media
Converter
Switch/Hub
w/SNMP
TP TP
Broken
Fiber
Cable
LFP ON LFP ON
l
LED lit = established link
°
LED unlit = no link
*Units are shipped with the LFP function enabled (ON).
Link Loss Return (LLR)
The fi ber ports of the FCU-280x have been designed with an
LLR function for troubleshooting a remote connection. LLR works
in conjunction with LLCF.
When LFP function is enabled *(by default), the port’s
transmitter shuts down when its receiver fails to detect a valid
receive link. LLR should only be enabled on one end of the link
and is typically enabled on either the unmanaged or remote
device.
The diagram below shows a typical network con fi guration with
a good link status using the FCU-280x for remote connectivity.
Note that LLR and LLCF are enabled as indicated in the diagram.
Media
Converter
Management
Station
Switch/Hub
w/SNMP
Station
Media
Converter
Switch/Hub
Fiber
Cable
LFP OFF LFP ON
l
LED lit = established link
°
LED unlit = no link
If one of the optical conductors is bad (as shown in the diagram
box below), the converter with LLR function will return a no-link
condition to its link partner. With LLCF function also enabled,
the no-link condition is carried forward to the switch/hub
where a trap is generated to the management station, and the
administrator can then determine the source of the loss.
Media
Converter
Management
Station
Switch/Hub
w/SNMP
Station
Media
Converter
Management
Switch/Hub
TP TP
Broken
Fiber
LFP ON LFP ON
l
LED lit = established link
°
LED unlit = no link
Port 2 Port 1
Link Loss Carried Forward
Link Loss Returned
Link Loss Carried Forward
Note
LFP function is turned on by default. This feature
can also be turned off via the side DIP-switch.
If you are familiar with the network installa-
tion, for diagnostic purpose (i.e. check which
end is broken), you can turn it off and reset the
converter to make it take effect. Otherwise, please
leave it at the default position.