Juniper EX2500-RMK-4POST Manuale Utente

EX2500 Ethernet Switch Hardware Guide

22

„ Troubleshooting

3.

Pull up the locking lever to lock the transceiver into place. 

4.

Connect the fiber-optic cable. 

To remove an SFP+ transceiver, disconnect the fiber-optic cable, and pull down 
the locking lever to release the transceiver. After you remove the transceiver, 
replace the safety cap. 

Troubleshooting 

This section contains basic troubleshooting information. Use it to help resolve 
problems that might occur during installation and operation of your switch. If you 
have problems accessing the switch or working with switch software, see your 
EX2500 Ethernet Switch Configuration Guide or EX2500 Ethernet Switch Command 
Reference. 

If you need additional technical assistance, refer to “Requesting Technical Support” 
on page xi. 

Symptom: The SYS and FAN LEDs do not light. 

Solution: Verify that the power cord or cords are properly connected to the power 
plug or plugs. Verify that AC power is available from the power source. 

Symptom: The port link LED does not light. 

Solution 1: Check the software configuration for the port (see the EX2500 Ethernet 
Switch Command Reference). If the port is configured with a specific speed or duplex 
mode, verify that the other device it is set to the same configuration. If the switch 
port is set to autonegotiate, verify that the other device is set to autonegotiate. 

Solution 2: Verify that the cables connecting the port to the other device are of the 
correct type and are connected properly. 

Symptom: All switch LEDs stay on, and the command prompt does not appear on 
the console.

Solution: The operating system might have been damaged. Use the console port to 
perform a serial upgrade of the switch software. For instructions, see the EX2500 
Ethernet Switch Command Reference.