Symptom
Possible Causes
Solution
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 RJ-45 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. 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 RPS 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.
The PoE port does not supply
power.
The PoE function is not enabled.
The connected twisted pair cable is
faulty.
The PD connected to the port does not
comply with 802.3af or 802.3at standard.
The serial port console terminal
connected to the PD is not correctly
grounded.
Enter the port configuration to enable the PoE
function.
Replace the twisted pair cable.
Replace the PD with one complies with 802.3af
or 802.3at standard. The RG-S2628G-P V2.XX
switch can provide the PD with power supply by
enabling the PoE non-standard compatibility
function.
Ground the serial port console terminal correctly.
The RG-S2628G-P V2.XX switch can provide the
PD with power supply by enabling the PoE
non-standard compatibility function.
The PoE port indicator is yellow.
The PD has a short circuit or is
overloaded. The power exceeds the
power value assigned to the port.
Check whether the rated PD power complies with
the output power range of the switch. If it does,
set the allocation power of switch ports at higher
value. If this still does not work, the PD may be
