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Creating and Modifying VLANs

Creating and Modifying VLANs

You can use the VlanDirector application to configure Ethernet, ATM, and Token Ring VLANs. These sections provide you with instructions on creating and modifying these different types of VLANs:

After you create the VLAN, you can add links and ports to it following the instructions in Chapter 5, "Configuring Links and Ports".

Before You Begin

Before you begin creating VLANs on your network, you should verify that switches are properly set up and gather information that you will need during the configuration. You also should assign each switch (non-ATM devices) to a VTP domain to organize the VLANs in your network. Folders can help you organize the VLANs within VTP domains.

For ATM VLANs, if you want VTP advertisements to go over the ATM cloud, you also need to configure LANE services for default ATM-VLAN on each ATM fabric. Follow the instructions in these sections for assistance with these tasks:

Configuring Switches

Follow the guidelines for configuring your switches in Chapter 2, "Preparing for Network Discovery" of the Getting Started with CWSI Campus publication.

Creating Folders

When you start CWSI Campus, the discovery process queries a device (using a supplied IP address and community string) as a starting point to find other devices and links in your network and builds a database containing information about those devices and connections. As a result of the discovery process, the VlanDirector application automatically creates a folder for each VTP domain in your network.

You can create folders to contain VLANs within VTP domain folders. The use of folders simplifies locating and managing VLANs.

Step 1 In the Names window (Figure 4-1), select a VTP domain folder in which to create a folder.


Figure 4-1: Names Window

Step 2 Select Edit>Create from the menu bar.

The Create Names Entry window opens (Figure 4-2) with the VTP domain displayed.


Figure 4-2: Folder: Create Names Entry Window

Step 3 In the Create Names Entry window, enter the appropriate settings, as described in Table 4-1.
Table 4-1: VLAN Folders: Create Names Entry Window Options
Field Description

Name

Enter a name for the folder.

Type

Click the Folder radio button.

Purpose

Enter a word or phrase that describes the folder.

Description

Describe the contents of the folder. Click the dotted button to the right of the field to display and scroll through your entry.

Step 4 Click OK.

Creating Ethernet VLANs

To configure Ethernet VLANs in your network, follow these steps:

Step 1 In the Names window (Figure 4-1), click the domain folder within which you want to create the VLAN.

Step 2 Select Edit>Create from the menu bar.

The Create Names Entry window (Figure 4-3) opens with the VTP Domain displayed.


Figure 4-3: Ethernet VLAN: Create Names Entry Window

Step 3 In the Create Names Entry window, enter the appropriate settings, as described in Table 4-2.
Table 4-2: Ethernet VLANs: Create Names Window Options
Field Description

Name

Enter a name for the VLAN.

Color

The color identifies the VLAN in the Names window and on the topology map. Select a color for the VLAN by clicking the down arrow to the left of the colored box. Choose from 13 standard colors or create your own custom color. See "Customizing VLAN Colors".

Type

Click the Ethernet radio button.

Purpose

Enter a word or phrase that describes the purpose of the VLAN.

Description

Describe the contents of the VLAN. Click the dotted button to the right of the field to display and scroll through your entry.

Advanced

Click the Advanced box to display the VLAN index and the 802.10 SAID parameter.

VLAN Index

The VlanDirector application automatically assigns a VLAN index. This number is incremented each time you create a VLAN. If you want to change the VLAN index, enter a number between 1 and 1024 to identify the VLAN.

802.10 SAID

The VlanDirector application generates a SAID value by adding 100000 to the VLAN index number. If the computed SAID value is in use, the SAID value is incremented until it discovers one not in use.

Step 4 Click OK.

Creating ATM VLANs and Configuring LANE Services

For ATM VLANs, if you want VTP advertisements to go over the ATM cloud, you need to configure LANE services for the default ATM VLAN on each ATM fabric.

Refer to these sections for assistance creating ATM VLANs and configuring LANE services:

These tips provide you with general recommendations for configuring LANE services using the VlanDirector application:

Tips

Creating the Default ATM-VLAN

Before you add LANE services to your network, you must make sure that the ATM devices (including edge devices) can be reached through SNMP. SNMP connectivity can be achieved by using RFC1483, RFC1586, or a management ATM-VLAN, such as the default ATM-VLAN.

Your network should also have a default ATM-VLAN if you want VTP advertisements to propagate through the ATM fabric. If the default ATM-VLAN does not exist, VTP advertisements will not flow through the ATM network.

When you set up a default ATM VLAN, you create a configuration server and LE server for the default ATM VLAN in your ATM network fabric.

To configure the settings for the configuration server and the LE Server, follow these steps:

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

The Configure Default ATM-VLAN window opens (Figure 4-4).


Figure 4-4: VlanDirector - Configure Default ATM-VLAN

Step 2 Enter any changes you want to make to the configuration server and LE server as described in Table 4-3.
Table 4-3: Create Default ATM VLAN Window Options
Field Description

Config?

Click to add or remove a check mark in this column.

A check mark creates a configuration server or LE server on the device shown. An empty check box (no check mark) does not create an configuration server or LE server on the device shown.

Existing configuration servers and LE servers do not have a check mark in the Config? column, and the status field indicates the state. Recommended configuration servers and LE servers have a check mark in the Config? column, and the Status field is blank.

Device <Module/Port>

Contains the host name and module/port numbers of the device on which you are creating the configuration server or LE server. Use the scroll bar to select another recommended host name.

Step 3 Click Configure

After you create the default ATM VLAN, you must make sure that the clients exist on the required devices and are up and operational. You must use the CLI on the device to configure LANE clients; you cannot configure LANE clients using the VlanDirector application.

After creating the LANE clients, you must rediscover the network and refresh the VlanDirector Names window, which updates the VTP VLAN to ATM-VLAN association.

Follow these steps to update the ATM VLAN information:

Step 1 From the CWSI Campus Map window, select View>Rediscover Map

Step 2 Start the VlanDirector application by selecting Tools>VlanDirector from the CWSI Campus Map.

Step 3 From the VlanDirector Names window, select File>Refresh.

Configuring the Config Server

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


Note To change the device specified for the primary configuration server, add a backup configuration server with the new desired device specified, and then delete the current primary configuration server. The backup configuration server will become the primary configuration server. If you change the primary configuration server, you should rediscover the network. From the CWSI Campus Map window, select View>Rediscover Map.

These sections describe the changes you can make to configuration servers:

Adding Backup Configuration Servers

Step 1 In the Names window (Figure 4-1), select Edit>Configure Config Server.

The Configure Config Server window opens (Figure 4-5).


Figure 4-5: Configure 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.

Step 4 The Device <Module/Port> column contains the host name and module and 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 Campus map and drop it in this field.

Step 5 Click Configure.

Deleting 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 becomes the priority 1 backup configuration server. You now can add backup configuration server A as the priority 2 backup configuration server.

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

The Configure LECS window opens showing the existing configuration servers 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 Configure.

Step 5 Click OK to confirm the deletion.

Creating ATM VLANs and Modifying the LE Server

Follow the instructions in this section to create ATM VLANs or to modify the LE server settings:

Creating ATM VLANs

Step 1 In the Names window (Figure 4-1), click the domain folder within which you want to create the VLAN.

Step 2 Select Edit>Create from the menu bar.

The Create Names Entry window (Figure 4-6) opens with the VTP Domain displayed.


Figure 4-6: ATM VLAN: Create Names Entry Window

Step 3 In the Create Names Entry window, enter the appropriate settings, as described in Table 4-4.
Table 4-4: ATM VLANs: Create Names Entry Window Option
Field Description

Name

Enter a name for the VLAN.

Color

The color identifies the VLAN in the Names window and on the topology map. Select a color for the VLAN by clicking the down arrow to the left of the colored box. Choose from 13 standard colors or create your own custom color. See "Customizing VLAN Colors".

Type

Click the Ethernet radio button.

Purpose

Enter a word or phrase that describes the purpose of the VLAN.

Description

Describe the contents of the VLAN. Click the dotted button to the right of the field to display and scroll through your entry.

Advanced

Click the Advanced box to display additional options.

VLAN Index

The VlanDirector application automatically assigns a VLAN index. This number is incremented each time you create a VLAN. If you want to change the VLAN index, enter a number between 1 and 1024 to identify the VLAN.

802.10 SAID

The VlanDirector application generates a SAID value by adding 100000 to the VLAN index number. If the computed SAID value is in use, the SAID value is incremented until it discovers one not in use.

LANE Services

Click LANE Services to bridge the VLAN across an ATM network.

Config?

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

Device <Module/Port>

Contains the host name and module/port numbers of the device on which you are creating the LE server. Use the scroll bar to select another recommended host name.

Order

Contains a number indicating the priority of the server for that ATM VLAN. You can have more than one LE server, one acting as the primary LE server and others acting as backups.

You cannot modify this field. It automatically increments for ever new row added.

Step 4 Click OK to save the changes and close the window.

Modifying LE Servers

When creating or modifying ATM VLANs, you can modify the LE servers associated with those ATM VLANs. When you modify the LE servers, follow these guidelines:


Note Since the configuration of LANE services uses a multi-threaded design, the actual order of LE servers is not guaranteed. You should configure one LE server per ATM fabric at a time for most reliable results.

Refer to these sections for information about modifying LE servers:

Adding LE Servers to Existing VLANs

To add an LE server to an existing VLAN, follow these steps:

Step 1 Select the VLAN in the Names window (Figure 4-1).

Step 2 Select Edit > Modify from the menu bar.

Step 3 In the Modify Names Entry window, enter the appropriate settings, as described in Table 4-5.
Table 4-5: Modify Names Entry Window Options
Field Description

Advanced

Click the Advanced box to display additional options.

LANE Services

Click LANE Services to display the LANE settings.

Config?

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

Device <Module/Port>

Contains the host name and module/port numbers of the device on which you are creating the LE server. Use the scroll bar to select another recommended host name.

Order

Contains a number indicating the priority of the server for that ATM VLAN. You can have more than one LE server, one acting as the primary LE server and others acting as backups.

Step 4 Click Modify.

Adding Backup LE Servers to a VLAN

To add an LE server to an existing VLAN, follow these steps:

Step 1 Select the VLAN in the Names window (Figure 4-1).

Step 2 Select Edit > Modify from the menu bar.

The Modify Names Entry window appears.

Step 3 Click Advanced.

Step 4 Click on the fabric field in the row containing the LE server for which you want to add the backup.

Step 5 Click Add Backup.

A new row is added to the LE server creation table.

Step 6 Change the default LE Server settings as described in Table 4-5.

Step 7 Click OK.

Deleting LE Servers

To delete an LE server, follow these steps:

Step 1 Select the VLAN in the Names window (Figure 4-1).

Step 2 Select Edit>Modify from the menu bar.

The Modify Names Entry window appears.

Step 3 Click Advanced.

Step 4 Click on the fabric field in the row containing the LE server you want to delete.

Step 5 Click Delete.

Step 6 Click OK.

Creating Token Ring VLANs

To create Token Ring VLANs, you must first configure the trBRF parent VLAN and then you configure the trCRFs that you want associated with the trBRF. Follow the instructions in these sections for configuring Token Ring VLANs:

Creating a trBRF

A trBRF is a logical grouping of trCRFs. Therefore, you must create the trBRF before creating trCRFs.

Step 1 In the Names window (Figure 4-1), click the domain folder within which you want to create the VLAN.

Step 2 Select Edit>Create from the menu bar.

The Create Names Entry window (Figure 4-7) opens with the VTP Domain displayed.


Figure 4-7: trBRF VLAN: Create Names Entry Window

Step 3 In the Create Names Entry window, enter the appropriate settings, as described in Table 4-6.
Table 4-6: trBRF VLANs: Create Names Entry Window Options
Field Description

Name

Enter a name for the VLAN.

Color

The color identifies the VLAN in the Names window and on the topology map. Select a color for the VLAN by clicking the down arrow to the left of the colored box. Choose from 13 standard colors or create your own custom color. See "Customizing VLAN Colors".

Type

Click the Token Ring (trBRF) radio button.

Purpose

Enter a word or phrase that describes the purpose of the VLAN.

Description

Describe the contents of the VLAN. Click the dotted button to the right of the field to display and scroll through your entry.

Advanced

Click the Advanced box to display additional options.

VLAN Index

The VlanDirector application automatically assigns a VLAN index. This number is incremented each time you create a VLAN. If you want to change the VLAN index, enter a number between 1 and 1024 to identify the VLAN.

Bridge Number

The bridge number is an integer in hexadecimal format. The default is 0xF, but you can edit it.

Spanning Tree Type

Choose the spanning tree standard that you are using: IEEE, IBM, or Auto.

Step 4 Click OK to save the changes and close the window.

Creating a trCRF

After you have created the trBRF, you can create the trCRFs that you want to assign to the trBRF. The VlanDirector application supplies valid values for these fields. You can change any field that does not comply with your requirements.

Step 1 In the Names window (Figure 4-1), select the parent trBRF folder within which you want to create the trCRF.

Step 2 Select Edit>Create from the menu bar.

The Create trCRF window (Figure 4-8) opens.


Figure 4-8: Create trCRF Window

Step 3 In the Create Names window, enter the appropriate settings, as described in Table 4-7.
Table 4-7: Create trCRF Window Options
Field Description

Name

Enter a name for the VLAN.

Color

The color identifies the VLAN in the Names window and on the topology map. Select a color for the VLAN by clicking the down arrow to the left of the colored box. Choose from 13 standard colors or create your own custom color. See "Customizing VLAN Colors".

Type

Make sure that trCRF is selected as the Type.

Purpose

Enter a word or phrase that describes the purpose of the VLAN.

Description

Describe the contents of the VLAN. Click the dotted button to the right of the field to display and scroll through your entry.

Type

Click the Token Ring (trBRF) radio button.

Advanced

Click the Advanced box to display additional options.

VLAN Index

The VlanDirector application automatically assigns a VLAN index. This number is incremented each time you create a VLAN. If you want to change the VLAN index, enter a number between 1 and 1024 to identify the VLAN.

Ring Number

The ring number is an integer between 1 and 0FFFH. By default, a unique ring number is selected within this range, but you can edit it.

Bridge Type

Choices include SRT and SRB; SRB is the default.

ARE (All Routes Explorer) Hop Count

Enter the ARE hop count. Valid numbers are 1 to 13, and 7 is the default.

STE (Spanning Tree Explorer) Hop Count

Enter the STE hop count. Valid numbers are 1 to 13, and 7 is the default.

Backup trCRF

Check this option if this trCRF is going to be the backup trCRF.

Step 4 Click OK to save the changes and close the window.

Modifying Basic VLAN Parameters

You can modify most of the VLAN characteristics that were entered when you created the VLAN. However, you cannot change the names of default VLANs or the VLAN index for any VLAN.

To access the Modify Name Entry window for all types of VLANs, follow these steps:

Step 1 Select the VLAN in the Names window (Figure 4-1) or locate the VLAN using the Find option.

Step 2 Select Edit>Modify from the menu bar.

The Modify Names Entry window opens. The VTP Domain is displayed and cannot be modified.


Note See the "Modifying LE Servers" section for specific guidelines on modifying ATM-VLANs.

Deleting VLANs

To delete any type of VLAN, follow these steps:

Step 1 Select the VLAN you want to delete from the Names window.

Step 2 Select Edit>Delete from the menu bar.

Step 3 When prompted, click Yes to confirm the deletion.

Deleting a VLAN removes the VLAN name from the Names window and removes the VLAN from all VTP servers in the domain, all transparent devices (if VTP.onTransparent is enabled), and all devices that are not running VTP.


Note You can only delete a Token Ring trBRF if the BRF does not contain any trCRFs. If the trBRF does contain any trCRFs, a dialog box notifies you that trCRFs are present and will be deleted. If you click Continue, the trCRFs and trBRF will be deleted.

Customizing VLAN Colors

An assigned color identifies the VLAN in the Names window and on the CWSI Campus map. There are 13 standard colors to choose from when creating or modifying a VLAN, or you can create your own custom colors. To create a custom VLAN color, follow these steps:

Tips

You can also follow these instructions to create custom VLAN colors while creating the VLAN.

Step 1 From the Names window, select Edit > Modify to open the Modify Names Entry window.

Step 2 Click the down arrow to the left of the colored box to change the color of the VLAN.

Step 3 Click the desired color or scroll to the bottom of the list and click Custom.... The CWSI Campus - Color window opens (Figure 4-9).


Figure 4-9: CWSI Campus - Color Window

Step 4 Enter numerical values in the fields corresponding to the RGB (red, green, and blue) colors, or use the sliders to manipulate the colors manually.

Step 5 Enter numerical values in the fields corresponding to the HSB (hue, saturation, and brightness) fields, or use the sliders to manipulate the hue, shading, and brightness manually.

Step 6 Click OK.


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Posted: Thu Sep 30 12:10:27 PDT 1999
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