Zyxel IES-1248 EE [504/544] Sfp lnk leds do not turn on

Zyxel IES-1248 EE [504/544] Sfp lnk leds do not turn on
Chapter 66 Troubleshooting
IES-1248-51/51A/53 User’s Guide
504
66.3 SFP LNK LEDs Do Not Turn On
The LEDs for one of the SFP slots do not turn on.
66.4 100/1000 LEDs Do Not Turn On
A 100/1000 Ethernet port’s LEDs do not turn on.
66.5 100/1000 Ethernet Port Data Transmission
The Ethernet port’s LED is on, but data cannot be transmitted.
Table 127 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 128 100/1000 LED Troubleshooting
STEPS CORRECTIVE ACTION
1 Each 100/1000M RJ-45 Ethernet port is paired with a mini GBIC slot. The IES-1248 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 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.
Table 129 Troubleshooting Data Transmission
STEPS CORRECTIVE ACTION
1 Make sure that the Ethernet port has the appropriate mode setting.
2 Make sure that the IES-1248’s IP settings are properly configured.
3 Check the VLAN configuration.
4 Ping the IES-1248 from a computer behind the peer Ethernet device.

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