This section describes how to extend VLANs into the ATM network. The ATM port can be in one or more VLANs. Each VLAN is associated with a LEC on the ATM Module, and each LEC is mapped to an ATM ELAN.

There are two ways to access the ATM LEC Setup screen:

• Select the ATM CONFIGURATION option from the Main Menu. The ATM Module Configuration screen is displayed, as shown in Figure 8-2. Select the ATM LEC SETUP button.

• Alternatively, if you are already in the ATM Port Setup Screen, as described in "ATM Port Setup", you can select the CONFIG button to display the ATM Module Configuration screen. An example of the ATM Configuration screen is shown in Figure 8-2. Select the ATM LEC SETUP button.

An example of the ATM LEC Setup screen is shown in Figure 8-3.

Figure 8-3 ATM LEC Setup Screen

Each time you complete the entry fields for a VLAN you must select APPLY to apply the changes. As soon as you select a different VLAN using the VLAN field any edits not already applied, using the APPLY button, are lost.

To set up an ATM VLAN:

1 .   Select the VLAN that you wish to configure. Enter the number associated with the VLAN in the designated field. VLAN to LEC mappings are shown in "ATM Port Setup". The default VLAN is VLAN 1, the admin VLAN.

You cannot configure VLAN 15 or VLAN 16 when these VLANs are being used for Auto-Select VLANs and Spanning Tree, respectively.

2 .   If the VLAN is to be connected to an ELAN, select Yes. If you do not wish the VLAN to be connected to an ELAN, select No.

3 .   If there is a LECS controlling ELANs on your network, it should automatically supply the LES address for the ELAN, and you should select the LECS option.

Only select the Manual option if:

• A LECS is not in use on the network, or

• The LECS is unaware of the existence of the ELAN to be joined, or

• You do not wish the LEC to join a LES controlled by a specific LECS.

If Manual is selected, the LES address field is displayed on the screen, and you should enter the ATM address of the LES associated with the selected VLAN/ELAN.

4 .   Enter the name of the ELAN that the VLAN is to join. The ELAN must have already been set up in the ATM network and be operational.

5 .   Select the APPLY button.

If the LEC associated with the VLAN is active when APPLY is selected, it will temporarily become inactive while the changes are applied, and you may experience a brief loss of communication on that connection.

Displaying all VLANs

If you wish to display the VLAN membership for all ports on the Switch, complete the following steps. If you wish to configure VLANs for the ATM Module you should use the ATM VLAN Setup screen, as described in "Extending VLANs into the ATM Network".

1 .   Select the SWITCH MANAGEMENT option from the Main Menu. The Switch Management screen is displayed, as shown in Figure 8-4.

Figure 8-4 Switch Management Screen

2 .   For the Management Level field, select the VLAN option and press the [TAB] key. The screen shown in Figure 8-5 is displayed.

3 .   Select the SETUP button to display the VLAN Setup screen.

An example of the VLAN Setup screen is shown in Figure 8-6.

Figure 8-5 VLAN Selected Screen

Figure 8-6 Switch VLAN Setup Screen

Use [Ctrl]+[d] keys to scroll down the list box to view the rest of the list, including the ATM port.

The ATM port is shown as ATM in the Type field, or as ATM Bp if it has been set up as a backbone port.