3onedata ES5026 Manuale d'uso - Pagina 20
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Appendix Trouble shooting
Problems
All LEDs are off
when power on the
switch
The LINK LED is
unlit.
Slower data
transmitting and
packets loss.
The network cable
works in one
port ,doesn't work in
another new port.
All the "ACT" LEDs
flash and the network
rate slow down
Stop to work after
working for a while.
"PoE" LED indicators
flash
Reasons
Power cord connection error or
power supply failure
1． Network cable is damaged or
the connection is not firm.
2． Wrong network cable type or
the cable is longer than 100m.
The communication pattern of
switch and PDs are not
matched.
There is no data transmitting
from PD and the switch can't
learn a new address to do
communication.
Caused by broadcast storm.
1. Abnormal power supply.
2. Overheating.
1. PoE port doesn't work
2. PD is overloaded
3.
The
network
cable
damaged.
17
Solutions
Check power cord connection and the
power socket.
Change the network cable.
Changed to matched pattern or
configure to auto-negotiation pattern.
Waiting for 120s, the swith will get
auto-updated address or transmitting
data from the PD, the switch will get
address then.
1. Check if there is a loop problem,
reasonably configure the network.
2. Check if there are large numbers of
broadcast packets from specific sites.
1. Check power connection and the
working voltage;
2. Check the working
environment,including air hole and
switch fan.
Check the network cable, port
is
connection or reduce the load of PDs.
User manual