Symptom
Possible Causes
Solution
At this time, the switch already stops the
normal service exchanges. Check in
time the working environment of the
switch, clean the dust on the cabinet and
reinforce the refrigeration effect.
The serial port console has no output
or outputs illegible characters.
The serial port connected to the
switch does not match that
opened by the configuration
software.
The serial port is not configured
correctly.
Change the serial port opened by the
configuration software to be the one
connected to the switch.
Check that the parameter configuration
of the serial port matches that specified
in the instructions.
The RJ45 port is not in connectivity
or it is erroneous in
receiving/transmitting frames.
The connected twisted pair cable
is faulty.
The length of the cable exceeds
100 m.
The port has special configuration
that has no common working
mode with the connected switch.
Replace the twisted pair cable.
Check that the port configuration has the
common working mode with the
connected switch.
The fiber port cannot be connected.
The Rx and Tx ends are
connected reversely.
The interconnected optical module
type does not match.
The fiber type is not correct.
The length of the optical fiber
exceeds that rated of the optical
module.
Switch the Rx and Tx ends of the optical
fiber.
Replace the optical module with one of
the matched type.
Replace the optical fiber with one of the
appropriate type.
Replace the optical fiber with one of the
appropriate length.
The extension module is not
identified by the host.
The module is not properly
installed or is in loose contact.
The module is installed after the
host is powered on.
Power off, install the module, and then
power on the host.
Power off, remove and install the module
again.
The RPS power indicator is not on.
(for only the S3760E-24/48)
The RPS power module in use is
not of the specified type.
The RPS power supply module is
faulty.
The RPS power supply cable is in
loose contact.
Replace the RPR power supply module
with one specified by Ruijie Networks.
Replace the RPS power supply.
Check whether the RPS power supply
cable is in loose contact.
