Руководство Пользователя для 3com 2226 PLUS

C

HAPTER

 5: T

ROUBLESHOOTING

If you forget the password to the Web interface after 
you set it, you will need to reset the Switch to regain 
access. See 

 on 

 for instructions. After resetting the Switch, 

you can log on to the Web interface again using the 
default admin account settings:

■

User name – 

■

Password – blank (no password)

If you forget the static IP address that you assigned to 
the Switch and you need to access the Web interface, 
use the Discovery application to automatically detect 
the IP address and connect to the interface.

For information on using the Discovery application, 
refer to 

.

This section lists some issues that are related to the 
LEDs on the front panel of the Switch. For informa-
tion on basic LED checks, refer to the following topics 
in 

:

■

■

■

■

There is a problem with this connection. Verify that:

■

The device being connected to is powered on and 
operating correctly.

■

The cable is connected at both ends.

■

The cable is not damaged.

■

If the connection is to a workstation, that the 
workstation's network interface is installed and 
configured correctly.

■

The correct category of cable is being used for the 
required link speed. Category 3 cables can be used 
for 10BASE-T operation only. Category 5 cable is 
required for 100BASE-TX or 1000BASE-T. 3Com 
recommends Category 5e or 6 cables for 
1000BASE-T operation.

Verify that:

■

The fiber cable is in good condition.

■

The SFP module is correctly inserted.

■

A 3Com SFP module is being used. Refer to 

 for 

details.

■

The equipment at the far end is installed and cor-
rectly configured.