Configuring LANE Services

You can use the following information to set up the default ATM VLAN, if you have not already done so during the initial CWSI set up, modify or delete a configuration server, or add a backup configuration server.

To create a new ATM VLAN, see "Creating VLANs" in Chapter 3, "Configuring VLANs."

To add LANE services to an existing VLAN or modify the LE server of an existing ATM VLAN, see "Adding LE Servers to Existing VLANs" in Chapter 3, "Configuring VLANs."

LANE Services

LANE services allow SNMP-connectivity within the ATM fabric and VTP advertisements to propagate throughout the ATM fabric. Several components provide LANE services. These components and the method for creating them are described in Table 5-1.

Table  5-1: LANE Component Descriptions

Component	Description	Requirements	Configure Using
Configuration Server	Contains the database that determines to which ATM VLAN an client belongs. Each client consults the configuration server just once, when it joins an ATM VLAN to determine which ATM VLAN it should join. The configuration server returns the ATM address of the LE server for that ATM VLAN.	At least one configuration server is required per ATM fabric.	VlanDirector
LE Server1	Acts as the control center. Provides joining, address resolution, and address registration services to the LE clients in that ATM VLAN. Clients can register destination unicast and multicast MAC addresses with the LE server. The LE server also handles LANE ARP (LE ARP) requests and responses.	At least one combined LE server and broadcast server is required per ATM VLAN.	VlanDirector
Broadcast Server1	Sequences and distributes multicast and broadcast packets and handles unicast flooding.	At least one combined server and broadcast server is required per ATM VLAN.	VlanDirector
Client	Emulates a LAN interface to higher-layer protocols and applications. Forwards data to other LANE clients and performs LANE address-resolution functions.	Can be a member of only one ATM VLAN. An ATM device can have several LE clients--one client for each ATM VLAN of which it is a member.	VTP or the device CLI

Creating the Default ATM VLAN

Creating a default ATM VLAN establishes LAN emulation (LANE) services. Before you create other ATM VLANs, you must have established the default ATM VLAN.

To configure a default ATM VLAN, take these steps:

Step 1 From the Names window, select Edit>Configure Default ATM-VLAN.

The Configure Default ATM-VLAN window opens (Figure 5-1). Existing configuration servers and LE servers have a check mark in the Config? column and the status field indicates an Active state. Recommended configuration servers and LE servers do not have a check mark in the Config? column and the Status field is blank.

Figure 5-1: VlanDirector - Configure Default ATM-VLAN

Step 2 Retain the default configuration server settings or change them as follows:

(a) Click to add or remove a check mark in the box in the Config? column. A check mark creates a configuration server on the device shown. No check mark (empty box) does not create a configuration server on the device shown.

(b) The Device <Module/Port> column contains the host name and module/port numbers of the device on which you are creating the configuration server. Use the scroll bar to select another recommended device or drag an ATM link from the CWSI topology window and drop it in this field.

Step 3 Retain the default LE server settings or change them as follows:

(a) Click to add or remove a check mark in the box in the Config? column. A check mark creates an LE server on the device shown. No check mark (empty box) does not create an LE server on the device shown.

(b) The Device <Module/Port> column contains the host name and module/port numbers of the device on which you are creating the configuration server. Use the scroll bar to select another recommended device address or drag an ATM link from the CWSI topology window and drop it in this field.

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Note Deleting a backup LE server raises the subsequent LE server's priority. You can change the order of the backup LE servers by deleting and adding them again until they are in the sequence you want. For example, to reverse the order of backup LE servers A (priority 1) and B (priority 2), delete backup LE server A. Backup LE server B now becomes the priority 1 backup server. Now you can add backup LE server A as the priority 2 backup server.

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Step 4 Click Configure.

Step 5 Rediscover the network using an ATM switch as the seed device, as follows:

(a) From the CWSI Map window, select Options>Properties>Discovery.

(b) Select an ATM switch from the Seed Device list to initiate the discovery of the ATM fabric.

(c) Click Apply to close the window.

(d) Select View>Rediscover Map to rediscover the network including the ATM fabric.

Modifying Configuration Servers

As part of setting up CWSI and VlanDirector for your ATM network, you need to have set up a default ATM VLAN. If you have not already done so, see "Creating the Default ATM VLAN."

When you set up a default ATM VLAN, you create a configuration server and LE server for your ATM network fabric. Using the Configure LECS window, you can add backup configuration servers, change the priority of backup configuration servers, and delete configuration servers.

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Note To change the device specified for the primary configuration server, add a backup configuration server with the new desired device specified then delete the current primary configuration server. The backup configuration server will become the primary configuration server.

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Adding Backup Configuration Servers

To add a backup configuration server, take the following steps:

Step 1 In the Names window, select Edit>Configure LE Config Server.

The LE Config Server window opens (Figure 5-2). Some fields are informational; others require input.

Figure 5-2: LE Config Server Window

Step 2 Click on the fabric field in the row containing the configuration server for which you want to add a backup.

Step 3 Click Add Backup.

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Note A check mark in the Config? column creates a configuration server on the device shown. No check mark (empty box) does not create a configuration server on the device shown.

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Step 4 The Device <Module/Port> column contains the host name and module/port numbers of the device on which you are creating the configuration server. Use the scroll bar to select another device or drag an ATM link from the CWSI topology window and drop it in this field.

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Note Cisco recommends devices based on load. It recommends the device with the fewest servers first, followed sequentially by devices with more servers.

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Step 5 Click Configure.

Changing the Priority of Backup Configuration Servers

You can change the order of backup configuration servers by deleting and adding them again until they are in the sequence you want. For example, to reverse the order of backup configuration servers A (priority 1) and B (priority 2), delete backup configuration server A. Backup configuration server B now becomes the priority 1 backup configuration server. Now you can add backup configuration server A as the priority 2 backup configuration server.

For more information, see "Deleting Configuration Servers."

Deleting Configuration Servers

To delete a configuration server, perform the following steps:

Step 1 In VlanDirector, select Edit>Configure LE Config Server....

The Configure LECS window opens showing the existing configuration server according to the fabrics to which they belong.

Step 2 Click the row containing the configuration server you want to delete.

Step 3 Click Delete.

Step 4 Click Ok to confirm the deletion.