Configuring ATM Virtual Channels for a Digital Off-Hook Configuration

Overview and Purpose

Guidelines for Configuring ATM Virtual Channels

Setting VPI/VCI Addresses

Adding New VPI/VCI Addresses

Guidelines for Adding New VPI/VCI Addresses

Steps for Adding New VPI/VCI Addresses

Deleting Subscriber PVCs

Deleting VPI/VCI Addresses

Viewing VPI/VCI Addresses Using the Subscriber PVCs Dialog Box

Configuring ATM Virtual Channels for a Digital Off-Hook Configuration

This chapter describes how to create ATM virtual channels for a Digital Off-Hook (DOH) configuration.

This chapter includes the following sections:

Overview and Purpose

To configure ATM channel mapping between the CPE and the ATM network through the Cisco 6100/6130, you need to configure the ATM virtual channels. This section includes some general guidelines to consider before you set up ATM virtual channels for your subscribers, illustrations and descriptions of the dialog boxes that you use for these tasks, and instructions for setting the virtual path identifier (VPI) and virtual channel identifier (VCI) addresses for your subscribers.

Guidelines for Configuring ATM Virtual Channels

Consider the following guidelines before you configure ATM virtual channels:

You can provision more than one permanent virtual connection (PVC) for each subscriber.

Each PVC contains both a network-side and a subscriber-side virtual circuit connection (VCC).

Each VCC has both a VPI and a VCI.

You must associate each defined subscriber to a VPI/VCI address before you can unlock the subscriber.

Before you add, delete, or modify PVC information about a subscriber, you must lock the subscriber's Administrative state by clicking Locked and then Apply.

Once you have assigned the VPIs and VCIs to subscribers, you can assign additional virtual circuits to a subscriber to provide multiple destinations.

If you enter VCI numbers, you must also enter VPI numbers.

Up to 28 specific virtual paths support VCC provisioning. The remaining 228 VPIs (according to ATM UNI 3.1) are reserved for VPC switching that ViewRunner executes in conjunction with subtending.

On the ViewRunner GUI, you use the Service Provisioning dialog box, shown in Figure 4-1, to define VCC addresses. The fields and columns on this dialog box are described in Table 4-1 and Table 4-2.
You configure latency per port, not per subscriber.
The path latency default setting is Interleaved.
You can configure priority queue on the Service Provisioning dialog box. Priority queue 1 represents the lowest delay and highest line availability.

Refer to the ATM Addressing Guidelines appendix in the ViewRunner for Windows User Guide for additional information on configuring VCCs.

Figure 4-1: Service Provisioning Dialog Box

Columns on the top of the Service Provisioning dialog box display the settings that you set in the Permanent Virtual Connection group box, which is on the lower half of the dialog box. The columns are described in Table 4-1. The fields on the Permanent Virtual Connection group box are described in Table 4-2.

Table 4-1: Service Provisioning Dialog Box Columns

Column Description

Subscriber ID

Displays at the top of the dialog box, the subscriber that is associated with the PVCs. This is a read-only field.

Subscriber VPI and Subscriber VCI

Displays the VPIs and VCIs for current subscribers. To delete a subscriber ID in this scroll-down PVC connection list, highlight that subscriber ID and click Delete Now.

Note You must first delete and then add a subscriber to change that subscriber's PVC settings.

Network VPI and Network VCI columns

Displays the current settings of the network VPI and VCI for a specific subscriber.

Note To change a Network ID, you must first delete the subscriber that is associated with that ID, and then add the subscriber with a new Network VPI and VCI.

Priority

A number 1 represents the lowest delay and highest line availability.

The Queue Priority can have a value of 1 through 3:

Voice transfer = 1

Voice Signaling = 2

Data transfer = 3

Note Passing standard data over queue 1 or queue 2 causes all transfers except pings to fail.

Table 4-2: Service Provisioning Dialog Box Permanent Virtual Connection Group Box Fields

Field Description

Subscriber VPI

Displays the Subscriber VPI, which is always 1. This field is read-only.

Subscriber VCI

When the subscriber is locked, you can change the VCI value. Click Add Now to create a new PVC for the subscriber and add it to the PVC connection list. Adding subscribers to the PVC connection list is subject to PVC configuration rules.

The available numbers are 0 to 3. Once you have used a number, it appears in the columns on the top of the dialog box, and no longer appears in this list.

Network VPI/VCI

When the subscriber is locked, you can edit the PVC VPI/VCI values. Click Add Now to create a new PVC for the subscriber and add it to the PVC connection list. Adding subscribers to the PVC connections list is subject to PVC configuration rules.

Latency (STU-C Module Service Provisioning only)

The default is set to Interleaved delay, the setting that Cisco recommends. Configure the Latency setting per port, not per subscriber.

Queue Priority

Use this field to set the queue priority to Voice as follows:

Voice transfer = 1

Voice signaling = 2

Data transfer = 3 (the default)

Note Passing standard data over queue 1 or queue 2 causes all transfers except pings to fail.

Setting VPI/VCI Addresses

The following sections provide instructions for setting VPI/VCI addresses for subscribers:

Adding New VPI/VCI Addresses

You add new VPI/VCI addresses on the Service Provisioning dialog box, which is described in the preceding section. The following sections include guidelines and steps for adding new VPI/VCI addresses.

Guidelines for Adding New VPI/VCI Addresses

The Permanent Virtual Connection group box on the Service Provisioning dialog box includes an area for setting Subscriber PVCs and an area for setting Network PVCs. Consider the following guidelines:

You must configure a VPI and a VCI number combination for both the subscriber and network sides.
Subscriber PVC considerations:
- You can map up to four VCCs per subscriber to specific-use or general-use virtual paths on the network side.
- VCCs are addressed on VPI 1 and VCIs 0 to 3.
- The default setting (for the Cisco 675) is VPI 1 and VCI 0.
- VCI 0 to 3 is the valid range for subscriber VCCs on each of the subscriber-side VPIs.
- VPI 1 is the default; this field is dimmed on the Service Provisioning dialog box Permanent Virtual Connection group box, which prevents you from modifying it.
Network-side considerations:

Steps for Adding New VPI/VCI Addresses

Complete the following steps to add new VPI/VCI addresses for subscribers. Refer to the field descriptions in Table 4-1.

Step 1 Click Add Subscriber or Edit Subscriber on the LIM Module Properties dialog box Port Configuration tab to open the Subscriber Properties dialog box.

Step 2 Click Service Provisioning on the Subscriber Properties dialog box to open the Service Provisioning dialog box, shown in Figure 4-2, opens.

Figure 4-2: Service Provisioning Dialog Box

Step 3 Confirm that the subscriber's Administrative state is Locked.

Step 4 Set the VCI/VPI information in the available fields on the Permanent Virtual Connection group box as follows:

Subscriber VPI---read-only; always 1
Subscriber VCI---0, 2, or 3
Network VPI---0 to 27
Network VCI---1 to 399

Note You cannot edit the subscriber-side VPI field.

Step 5 Click Add Now.

ViewRunner immediately creates the subscriber PVC.

Step 6 Repeat Step 3 through Step 5 for each VCI/VPI address that you want to add.

Once you have assigned VPIs and VCIs to subscribers, you can provide multiple destinations by assigning additional virtual channels to a subscriber.

Step 7 Click Close.

Deleting Subscriber PVCs

Complete the following steps to delete subscriber PVCs:

Step 1 Confirm that the Administrative state of the subscriber whose PVC you want to delete is set to Locked.

Step 2 On the Service Provisioning dialog box, place your cursor over the subscriber PVC that you want to delete and click Delete Now, which opens the Delete Confirmation dialog box (see Figure 4-3).

Figure 4-3: Confirmation dialog box

Step 3 Click Yes on the Delete Confirmation dialog box.

ViewRunner deletes the subscriber PVC.

Step 4 Repeat Step 1 through Step 3 for every PVC you want to delete.

Step 5 Click Close.

Deleting VPI/VCI Addresses

If you want to change the port entries and reuse an address for a new subscriber, you must first delete the subscriber that is assigned to that address. The system does not allow an identifier to be used for more than one subscriber. To delete subscriber PVCs, complete the following steps:

Step 1 Access the Subscriber Properties dialog box by clicking Edit Subscriber on the Module Properties dialog box Port Configuration tab.

Step 2 Click Service Provisioning on the Subscriber Properties dialog box.

The Subscriber Properties dialog box opens.

Step 3 Highlight the subscriber VPI that you want to delete from the Subscriber VPI column.

Step 4 Click Delete Now.

Step 5 Click Yes in the Confirmation dialog box.

Step 6 Repeat Step 3 through Step 5 for each PVC that you want to delete.

Step 7 Click Close when you are finished deleting subscribers.

Viewing VPI/VCI Addresses Using the Subscriber PVCs Dialog Box

Consider the following guidelines before you modify subscribers' VPI and VCI addresses:

After you have assigned the VPIs and VCIs to subscribers, you can assign additional virtual circuits to a subscriber. Assigning additional virtual circuits allows a subscriber to have multiple destinations.
Up to 28 specific virtual paths support VCC provisioning. In compliance with ATM UNI 3.1, the remaining 228 VPIs are reserved for VPC switching, which ViewRunner executes in conjunction with subtending.

To view or modify the VPI/VCI addresses, complete the following steps:

Step 1 Right-click the Chassis View on the frame or on the edge of the chassis GUI, and then choose View Subscriber PVCs from the menu.

The Subscriber PVCs dialog box, shown in Figure 4-4, opens.

Figure 4-4: Subscriber PVCs Dialog Box

This dialog box displays the following columns for each subscriber:

Port
Type
Subscriber VPI/VCI
Network VPI/VCI
Priority
Latency data

Step 2 Click a hyperlink subscriber ID (blue, underlined text) to open a specific Subscriber Properties dialog box.

Step 3 Change the Administrative state to Locked as follows:

a. Click Locked next to Administrative state.

b. Click Apply.

c. Click Yes in the message box.

Step 4 Click Service Provisioning to open the Service Provisioning dialog box.

Step 5 If you want to modify any VCI/VPI addresses, you must first delete them and then add them again. See the "Adding New VPI/VCI Addresses" section and the "Deleting VPI/VCI Addresses" section.

Step 6 Click Close when you are finished viewing subscriber PVCs.

As a precaution, you should always verify port and module settings after you have provisioned new subscribers or modified the settings for existing subscribers. See "Unlocking Entities and Verifying Provisioned Subscribers," for these instructions.

Table of Contents

Configuring ATM Virtual Channels for a Digital Off-Hook Configuration