Network Adapter - LED Status

Network Adapter - LED Status

Use the below tables to determine the status of the Ethernet or Token-Ring adapter cards for diagnosing network problems.

Ethernet Card LED Status

LED Name - Status	Explanation
LNK - On LNK - Off	Sucessfully linked to the network No link established. Check for: Good network condition Good cable between computer and network receptacle. Replace: Ethernet adapter Riser card System board
ACT - On ACT - Off	Activity present (Transmit and Receive data to and from the network). No activity.
100 TX - On 100 TX - Off	Network speed equals up to 100Mbps Network speed equals up to 10Mbps

Token-Ring Card LED Status Adapter LED Status

Amber	Green	Explanation
Blinking (500ms)	Blinking (500ms)	The adapter is active and waiting for initialization.
Off	Off	The adapter initialization is in progress, the computer is powered off, or the adapter is not active. Run LANAID and verify the adapter's configuration. The adapter might be configured for Plug and Play while the system is not enabled for Plug and Play. Reconfigure a valid configuration and store it to the adapter.
Off	Blinking (80ms)	The adapter did not detect any problems during its self-diagnostic tests and is waiting to open. If this LED state occurs after the adapter is open, this state indicates that the adapter is closed.
Off	On	The adapter is open and operating correctly.
On	Off	The adapter self-diagnostics tests failed or there is a problem with the adapter.
Blinking (80ms)	Off	The adapter is closed. One of the following conditions exists: The adapter open failed. The adapter detected a wire fault. The adapter failed the auto-removal test.
Blinking (80ms)	On	The adapter has detected beaconing or a hard error.

Token-Ring Table Terms and Definitions

Auto-removal	The state in which a token-ring adapter port removes itself
	from the network to perform self-tests to verify that it is not
	the cause of a hard error. If the tests are successfully,
	the port will reattach itself to the network.
Beaconing	The state that a token-ring adapter port enters after it has
	detected a hard error. The error condition is reported to the other
	devices on the network. Beaconing can result in the port removing itself
	from the network (auto-removal) to determine whether it is the cause
	of the hard error.
Hard error	An error condition on a network that requires removing the source
	of the error or reconfiguring the network before the network can
	resume reliable operation.
Initialization	The first step taken to prepare the port for use after the computer has
	been booted. During initialization, the port runs a series of internal
	self-diagnostic tests.
Open	The state in which the port has established connection with other
	devices on the ring.
Wire fault	An error condition caused by a break or short circuit in the cable segment
	that connects the port to its access unit, such as an IBM 8230 Token-Ring
	Network Controller Access Unit.