Forgotten Static Ip Address; Solving Led Issues - HP V1905 Series Getting Started Manual

Forgotten Static IP Address

If you forget the static IP address that you assigned to the switch, you can use the display ip command
through the Console Port (see

Solving LED Issues

This section lists some issues that are related to the LEDs on the front panel of the switch.
Gigabit Combo Ports (RJ-45/SFP)

Link/Activity Status LEDs

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 switch 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. HP
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 HP SFP module is being used.

The equipment at the far end is installed and correctly configured.

The Link/Activity LED is on, but network performance is poor
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:
Auto-negotiation enabled, or

 The ports are configured for half-duplex operation
All ports appear to show continual activity.
There may be broadcast storms on the network. Remove port connections one at a time, waiting a few
seconds between each port. If the LEDs go off after removing a port connection, the device that was
"CLI Reference Guide").
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