The ATM VLAN LEC Status screen shows LEC statistics for the ATM port. You can use the status information to monitor the health of a VLAN's LEC and to track down the cause of any problems. You can also monitor the amount of Ethernet traffic on the selected VLAN.

To access VLAN statistics, first access the ATM Port Statistics screen, as described in "ATM Port Statistics", and then select the LEC button.

An example of the ATM VLAN LEC Status screen is shown in Figure 9-4.

Figure 9-4 ATM VLAN LEC Status Screen

Port ID Identifies the currently selected port.

VLAN Allows you to select the VLAN you wish to monitor. The default is VLAN 1. If you wish to review the state of all VLANs on the ATM Module, see "ATM Port Setup".

LEC State Shows the state of the LEC to LES communication. The states are shown in Table 9-2.

Table 9-2 LEC State Summary

LEC State	Description
Active	The LEC is in use.
Inactive	The LEC is not in use. The LEC may be inactive because it has not been able to establish communication with the LES and BUS, or because the ATM port has been disabled by management.
Not in Use	You have specified that the LEC is not required at the present time.

LEC ELAN Name Shows the name of the ELAN that the VLAN/LEC has joined.

LEC ATM Address Shows the ATM Address of the LEC associated with the selected VLAN. If the ATM Module is connected to a CoreBuilder 7000 ATM Switch, you can cross-reference the LEC ATM Address set up on the ATM Module with the address shown by the CoreBuilder 7000 ATM Switch.

Last LEC Failure Reason If the LEC configuration fails, the last know failure state is shown. The failure state can be used to identify the cause of the failure. The failure state and possible causes are shown in Table 9-3.

Table 9-3 Last LEC Failure Reason

State	Possible Causes	Possible Solutions
None	The LEC is either inactive or has successfully completed the operation.	None required.
Timeout A task could not be completed within its allotted time frame.	The software has been set up to use a LECS, but a LECS is either not present on the network or broken.	If there is a LECS on your network, ensure that it is operational and on part of the network that can be accessed by the ATM Module. If a LECS is not present on the network, you must enter the LES Address for each ELAN manually using the ATM VLAN Setup Screen (see "Extending VLANs into the ATM Network").
	The LES for the ELAN is not functioning correctly	Contact Technical Support
Undefined Error An error has occurred but no cause can be identified.	Unknown.	Contact Technical Support.
Version Not Supported LANE 1.0 not supported.	The LANE services you are trying to connect to, do not support LANE version 1.0.	Ensure that the LANE Services use LANE 1.0.
Invalid Request Parameters The LES/LECS has rejected a request from the LEC because the request parameters were incompatible with the ELAN.	The LEC may be requesting a resource that is on an ELAN which has a different LAN type to the LEC.	Check the underlying media for both the ELAN and the LEC requesting the service.
	The frame size used could be wrong.	Check the frame sizes being used.
Duplicate LAN Destination A destination source MAC address duplicates a previously registered MAC address.	The LES has received a request from a LEC which contains a MAC address already registered to another LEC on the same ELAN. You may have accidentally entered the same MAC addresses twice.	Ensure that MAC addresses are unique.
Duplicated ATM Address A source ATM address duplicates a previously registered ATM address.	The LES has received a request from a LEC which contains an ATM address already registered to another LEC on the same ELAN. For example, if a LES is faulty, when a LEC disconnects from the LES, the LES might fail to register the change. When the LEC tries to rejoin the LES, the LES still has that LEC's ATM address in its database, and thinks that two devices have the same ATM address. You may have accidentally entered the same ATM addresses twice.	Ensure that ATM addresses are unique. Check the LES database for duplicate addresses.
Insufficient Resources There are insufficient resources to grant a request.	Too many connections have been requested and the tables used by the LES may be full, and the connection cannot be set up.	You may wish to consider extending or restructuring your network.
	The ATM Switch is busy and cannot provide LECS functionality.	Use a separate ATM Switch for LECS functionality.
	There is a mismatch between the VPI/VCI range supported by adjacent ATM devices. Example: If Switch A supports VPI/VCI values 7:511 and Switch B only supports values up to 7:255, when Signalling tries to set up a connection using the VPI/VCI value 7:256, Switch B rejects the connection.	Make the MAX VPI/VCI Bits compatible.
Access Denied The LES has denied the LEC access to the ELAN for security reasons.	The LEC is trying to join an ELAN that it is not allowed to access.	Check your LANE Services setup.
Invalid Requestor ID The LEC Identifier (LECID) is not zero, or is not recognized as this LEC's LECID.	There is a problem with the LEC software.	Contact 3Com Support.
Invalid LAN Destination You are trying to register a multicast address with the LES.	You may have configured an illegal Local Administration Address.	Check that the Local Administration Address is valid. Local Administration Address setup is beyond the scope of this guide.
Invalid ATM Address Source or destination ATM address is not in a recognized format.	The ATM address field may have been corrupted or not in the correct format. For example, it may be in E.164 when OSI N-SAP address coding is required.	Contact your supplier or 3Com Technical Support.
No Configuration The LECS/LES does not recognize the LEC or the requested ELAN	The MAC address may be invalid.	Check that each MAC address on your network is unique.
	The LEC may be requesting a resource that is on an ELAN which has a different LAN type to the LEC.	Check the LAN type used.
	You may have entered an invalid ELAN name.	Check that the ELAN name is correct, and the ELAN has been set up correctly.
LE_CONFIGURE Error This state may be given to refuse a service without giving a specific reason.	The information provided by the LEC may be invalid.	As this state is used to indicate a range of problems, you should check the other states and solutions described in this table. If this does not resolve the problem contact 3Com Technical Support.
	You may have entered an invalid ELAN name.	Check that the ELAN name is correct, and the ELAN has been set up correctly.
Insufficient Information The LEC has not provided sufficient information to allow the LECS to assign it to a specific ELAN.	The MAC address may be invalid.	Check that each MAC address on your network is unique.
	The LEC may be requesting a resource that is on an ELAN which has a different LAN type to the LEC.	Check the LAN type used.
	You may have entered an invalid ELAN name.	Check that the ELAN name is correct, and the ELAN has been set up correctly.

LEC Operation at Failure Identifies the operation that was being carried out when the LEC setup failed. This field should be used in conjunction with the Last LEC Failure Reason to identify the cause of the problem. The possible operations are shown in Table 9-4.

Table 9-4 LEC Operation at Failure

Operation	Description
None	There are no known operation failures.
Calling LECS	The LEC is trying to connect to the LECS to receive LANE configuration information.
Reading Configuration from LECS	The LEC receives configuration information from the LECS in preparation for joining the LES.
Joining LES	The LEC is trying to join the ELAN by registering itself with the LES that controls that ELAN. When the LEC has joined the LES, it is given a unique LAN Emulation Client Identifier (LECID), knows the Emulated LAN's maximum frame size, and knows its LAN type (either Ethernet or Token Ring).
Initial Registration	After joining, a LEC can register any number of MAC addresses and/or Route Descriptors (for Token Ring implementations).
Connecting to BUS	In order to establish a connection to the Broadcast and Unknown Server (BUS) the LEC requires the broadcast address. It requests the broadcast address from the LES.
Operational	The LEC is now part of the ELAN.

Frames Received The number of Ethernet frames received by the LEC.

Frames Transmitted The number of Ethernet frames transmitted by the LEC.

Octets Received The number of Ethernet octets received by the LEC.

Octets Transmitted The number of Ethernet octets transmitted by the LEC.

If you see the following symptoms, there may be a problem at the ATM Switch end of the connection:

The LEC is active and the LEC Operation at Failure is None, but the frames or octets counters are showing zero.

If you have followed the troubleshooting instructions in this section and within , and you still have a problem, contact 3Com Technical Support. Refer to "Technical Support" for details.

The following button is available on this screen:

CLEAR SCREEN COUNTERS To make it easier to note the changes in statistic values, you can use this button to reset the value of statistics shown on the screen to zero. Resetting the values shown on the screen does not reset the statistic values stored on this device.