ZyXEL Communications IES-1248-51A, User Manual

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Chapter 70 Troubleshooting
IES-1248-51V User’s Guide
568
70.3 SFP LNK LEDs Do Not Turn On
The LEDs for one of the SFP slots do not turn on.
70.4 100/1000 LEDs Do Not Turn On
A 100/1000 Ethernet port’s LEDs do not turn on.
3 Make sure you can feel and/or hear the fans working - working fans emit a
low buzz and blow air.
4 If the voltage levels are outside the allowed range, take a screen shot of the
statistics monitor command display and contact your vendor.
Table 217 ALM LED Troubleshooting (continued)
STEP CORRECTIVE ACTION
Table 218 SFP LNK LED Troubleshooting
STEPS CORRECTIVE ACTION
1 Make sure that the Ethernet port’s mode is set to match that of the peer
Ethernet device.
2 Check the cable and connections between the SFP slot and the peer Ethernet
device.
3 Check the mini GBIC transceiver.
4 Make sure that the peer Ethernet device is functioning properly.
If the cable, transceiver and peer Ethernet device are all OK and the LEDs
stay off, there may be a problem with the SFP slot. Contact the distributor.
Table 219 100/1000 LED Troubleshooting
STEPS CORRECTIVE ACTION
1 Each 100/1000M RJ-45 Ethernet port is paired with a mini GBIC slot. The IES-
1248-51V uses one connection per pair.
2 Check the Speed Mode settings in the ENET Port Setup screen. Make sure
that the 100/1000 Ethernet port’s connection speed is set to match that of
the port on the peer Ethernet device. When an Ethernet port is set to Auto,
the IES-1248-51V tries to make a fiber connection first and does not attempt
to use the RJ-45 port if the fiber connection is successful.
3 Check the Ethernet cable and connections between the 100/1000 Ethernet
port and the peer Ethernet device.
Use 1000Base-T 4-pair (8 wire) UTP Cat. 5 Ethernet cables with the RJ-45
interface.
4 Make sure that the peer Ethernet device is functioning properly.
If the Ethernet cable and peer Ethernet device are both OK and the LEDs still
stay off, there may be a problem with the port. Contact the distributor.