Lantronix ETS Reference Manual - B:  Troubleshooting

B-1

B:  Troubleshooting

Before troubleshooting your ETS, ensure that all physical connections are secure. Refer to the Installation 

chapter of your Installation Guide for connection instructions. Your Installation Guide may also contain 

additional troubleshooting information.

Many unexplained errors are the result of having duplicate IP addresses on the network. Ensure that your 

ETS has a unique IP address before proceeding.

If you are having problems operating the ETS in a wireless Ethernet network, it may help to connect the 

ETS to a wired Ethernet network for troubleshooting. 

B.1   Power-up Troubleshooting

B.2   DHCP Troubleshooting

Table B-1:  Error Messages

Message

Diagnosis/Remedy

Power-up diagnostic failure 

(hardware failure)

Note which LED is blinking and its color, then contact 

your dealer or Lantronix Technical Support

Network Error: The ACT/

OK LED will blink yellow 

2-3 times per second.

Make sure the Ethernet network cable is properly con-

nected and reboot the ETS. If that fails to resolve the 

problem, reload Flash ROM. Refer to Appendix C.

Table B-2:  DHCP Troubleshooting

Area to Check

Explanation

DHCP is enabled on the 

ETS

Use the Set Server DHCP Enabled command. 

If you manually enter an IP address, DHCP is automat-

ically disabled.

Make sure the DHCP server 

is operational.

Check to see that the DHCP server is on and is func-

tioning correctly.

The ETS gets its IP address 

from the DHCP server

Refer to the DHCP Manager on your DHCP server 

for information about addresses in use. If the DHCP 

server doesn’t list your ETS IP address, there may be a 

problem.