ZyXEL Communications ES-2108 User Manual

ES-2108 Series User’s Guide

Chapter 30 Troubleshooting

197

This chapter covers potential problems and possible remedies. 

Table 61   Troubleshooting the Start-Up of Your Switch

None of the LEDs 

turn on when you 

turn on the switch.

Check the power connection and make sure the power source is turned on. 

If the error persists, you may have a hardware problem. In this case, you should 

contact your vendor.

Table 62   Troubleshooting Accessing the Switch

I cannot 

access the 

switch using 

Telnet.  

Make sure the ports are properly connected. 
You may have exceeded the maximum number of concurrent Telnet sessions. Close 

other Telnet session(s) or try connecting again later. 
Check that you have enabled Telnet service access. If you have configured a secured 

client IP address, your computer’s IP address must match it. Refer to the chapter on 

access control for details.

I cannot 

access the 

web 

configurator.

The administrator username is “admin”. The default administrator password is “1234”. 

The username and password are case-sensitive. Make sure that you enter the correct 

password and username using the proper casing. If you have changed the password 

and have now forgotten it, you will need to upload the default configuration file. This 

restores all of the factory defaults including the password.
Check that you have enabled web service access. If you have configured a secured 

client IP address, your computer’s IP address must match it. Refer to the chapter on 

access control for details. 
Your computer’s and the switch’s IP addresses must be on the same subnet.
See the following section to check that pop-up windows, JavaScripts and Java 

permissions are allowed.