3Com 2226 PLUS - Manual (Page 72)

72 C HAPTER 5: T ROUBLESHOOTING
After resetting the Switch, log on to the Web interface
using the default admin account settings:
■ User name – admin
■ Password – blank (no password)
Forgotten Static IP Address
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 “Running the Discovery Application” on page 23.
Solving LED Issues
This section lists some issues that are related to the LEDs
on the front panel of the Switch. For information on
basic LED checks, refer to the following topics in
Chapter 1:
■ (2) Gigabit Combo Ports (RJ-45/SFP)
■ (3) Link/Activity Status LEDs
■ (5) Power LED
A link is connected, but the Link/Activity
LED for the port is off.
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.
A fiber cable is connected, but the Module
Active LED is off.
Verify that:
■ The fiber cable is in good condition.
■ The SFP module is correctly inserted.
■ A 3Com SFP module is being used. Refer to
“Approved SFP Transceivers” on page 19 for details.
■ The equipment at the far end is installed and
correctly configured.