3com 3CBLSF26H Manual De Usuario

 

4-2 

You can use localuser command to configure a new user through the Console Port (see CLI Reference 

Guide). 

If you forget the static IP address that you assigned to the switch, you can use display ip command 

through the Console Port (see CLI Reference Guide). 

This section lists some issues that are related to the LEDs on the front panel of the switch.  

z 

Gigabit Combo Ports (RJ-45/SFP) 

z 

Link/Activity Status LEDs 

z 

Power LED 

There is a problem with this connection. Verify that: 

z 

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

z 

The cable is connected at both ends. 

z 

The cable is not damaged. 

z 

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

configured correctly. 

z 

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: 

z 

The fiber cable is in good condition. 

z 

The SFP module is correctly inserted. 

z 

A 3Com SFP module is being used. 

z 

The equipment at the far end is installed and correctly configured. 

The switch supports full-duplex auto-negotiation. If the connected device does not support 

auto-negotiation, ensure that it is configured for half-duplex operation only. If the connected device has 

auto-negotiation disabled or overridden, and is configured as full-duplex, the switch will configure the 

link as half-duplex, causing a mismatch that will reduce network performance when data is transmitting 

and receiving simultaneously on the same link. 

Ensure that the connected device has either: 

z 

Auto-negotiation enabled, or 

z 

The ports are configured for half-duplex operation