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This chapter provides step-by-step instructions for provisioning a Digital Off-Hook
(DOH) configuration.
Service provisioning is the process of granting asymmetric digital subscriber line (ADSL) service to subscribers. A prerequisite for service provisioning is that a management connection must exist for ViewRunner for Windows to provision the Cisco 6100 Series system. A Cisco 6100 Series must therefore contain at least a multiplexer chassis (MC) and a system controller (SC) module. During the provisioning process, operator-entered information is sent immediately to the Cisco 6100 Series system by means of Simple Network Management Protocol (SNMP) set and get messages. If the management connection is not working, lost SNMP messages are retried but eventually are dropped.
The three configurations for the Cisco 6100 Series system are
When you provision the Cisco 6100 Series system for the DOH configuration style, you must
Step 1 Create logical pools.
Step 2 Assign CAP ATU-C and LIM ports to logical pools.
Step 3 Associate subscribers to LIM ports.
Step 4 Assign subscriber VPI/VCI addresses.
Step 5 Unlock entities.
Each of these steps is covered in detail in the following sections. You can execute these steps only after the successful discovery of all components.
Service provisioning involves a variety of configuration rules that prevent error when ATM connections are being established. ViewRunner for Windows includes service provisioning logic for all valid combinations of configuration data. The configuration rules are discussed in the following subsections.
Subtending is a Cisco 6100 Series feature which reduces the cost per subscriber by amortizing the expense of the network interface (NI) module and the edge switch port connection over a large number of subscribers.
Subtending
You can
Figure 3-1 illustrates the connections of a subtended Cisco 6100 Series system with six
subtended systems.
Figure 3-2 shows valid address ranges for each Cisco 6100 Series system.
Although the valid address space shown above indicates that up to 9600 VCCs can be supported, the number is constrained by several factors. As the software content increases with each new release, a greater percentage of existing SC module and NI RAM is consumed by resident application code.
See "Cisco 6100 Series System ATM Addressing Guidelines," for more information.
A logical pool is a logical grouping of modems and lines. This grouping achieves a particular concentration of subscriber lines to CAP ATU-C modems, such as, 1:1, 2:1, or 6:1. For DOH installations, you can define up to three logical pools per physical pool.
The MC is divided into two physical pools: A and B. Physical pool A consists of every component in the top half of the chassis and physical pool B is the bottom half. Chassis partitioning into physical pools A and B cannot be changed. Figure 3-3 shows the partitioning of the physical pools in the MC.
Each LCC and PSC is also divided into physical pools. Physical pool A is the left half of the chassis and physical pool B is the right half. Logical pools are constrained to physical pools; that is, a logical pool can contain lines and modems only from modules plugged into a specific physical pool. For more information on physical and logical pools, see the Cisco 6100 Set Up and Installation Manual.
Figure 3-4 shows the physical pools for the LCC.
Figure 3-5 shows the physical pools for the PSC.
To create a logical pool follow this procedure:
Step 1 Right-click the MC to view the multiplexer chassis drop-down menu.
Step 2 Select Pool Properties.The Physical Pool: Logical Pool Tab Configuration dialog box appears. Figure 3-6 shows the Pool Properties menu option.
Step 3 The Physical Pool: Logical Pool Tab Configuration dialog box uses two-tiered tabbed dialog boxes to represent the physical and logical pools. An outer pair of tabs allows selection of either physical pool A or B. Figure 3-7 shows the dialog box with no
pools assigned.
Within a physical pool tab, a second set of tabs shows the logical pools configured for that physical pool. Logical pool tabs start with logical pool 1 up to logical pool 3.
Step 4 To create a logical pool, click the Add Pool Now button on the Physical Pool dialog box. A new Logical Pool tab appears (Figure 3-8).
In Figure 3-7, you can see that logical pool 3 has just been added because in the Over-Subscription Ratio (OSR) field, logical pool 3 is (Assigned) but not (Provisioned) like the other two logical pools.
The dialog box displays a variety of statistics describing the configuration of the logical and physical pools. Running totals or summaries of pool assignments describe the characteristics of the ports and subscribers assigned to the pools. Table 3-1 provides field descriptions of the Physical Pool: Logical Tab Configuration dialog box.
Over-subscription ratio, a key statistic in DOH configurations, is calculated using three formulas, each of which provides a different view of over-subscription. These calculations are kept current for each logical pool. The statistics are initially displayed when the logical pool tab is selected. All statistics are recalculated and updated in the dialog box whenever you assign or unassign a CAP ATU-C or LIM port from the
logical pool.
Table 3-1 lists the functionality and content of each field in the Physical Pool: Logical Pool Tab Configuration dialog box.
:
| Button | Description |
|---|---|
Add Pool Now | Up to three logical pools can be provisioned per physical pool using the Add Pool Now button. Tabs display in the order in which you create them. Therefore, if logical pools 1, 2, and 3 exist and 2 is deleted, then logical pool 3 becomes logical pool 2. |
Delete Pool Now | Pressing this button deassigns any ports that are currently assigned to the selected logical pool and then deletes the logical pool. Note ViewRunner for Windows requires all assigned LIM ports to be locked prior to pool deletion. The Delete Pool button is dimmed unless all assigned LIM ports are locked. |
Over Subscription Ratios (OSRs) This field displays the running total of over-subscription within the currently selected logical pool. ViewRunner displays three different over-subscription formulas. These three ratios are described below. | |
Assigned Port OSR | Reflects the number of line ports assigned to the logical pool divided by the number of ATU-C ports assigned to the logical pool. This ratio is useful when you are initially configuring logical pools. It is based on locked entities. Assigned Port OSR effectively displays the target over-subscription provisioning ratio for the pool. |
Provisioned and Unlocked OSR
| Reflects the number of unlocked line ports that are · Assigned to the logical pool · Subordinate to an unlocked module · Associated to an unlocked subscriber This number is divided by the number of unlocked ATU-C ports assigned to the logical pool that are subordinate to an unlocked module. Locking ATU-C ports increases the OSR (for example, 3:1 goes to 6:1). Locking LIMs reduces the OSR (for example, 6:1 goes to 3:1). This ratio is useful if you want to verify that the system is properly configured and administratively unlocked to support the target OSR. This ratio is equal to the assigned port OSR when all provisioning needed to support service is completed and the entities are unlocked. |
Provisioned and In-Service OSR | Reflects the number of in-service line ports assigned to the logical pool that are also associated to an unlocked subscriber. This number is divided by the number of in-service CAP ATU-C ports assigned to the logical pool. This ratio displays the active OSR that the system is experiencing, factoring required configurations, administrative permissions, and the service state of the pooled ports. Provisioned and In-Service OSR includes the Operational state of the system and varies as alarms set or clear. |
This ratio displays running totals of several counts and calculated values. ViewRunner displays the following statistics when you select the logical pool tab:
ViewRunner updates running totals whenever you delete a logical pool, or when you assign or unassign a port to or from a logical pool. These statistics give a summary view of many of the Cisco 6100 Series system's critical service parameters. For large system configurations, most of the list-boxes on this dialog box are filled and have scroll bars. These totals provide a convenient summary and replace the scrolling the list-box and manually tallying DOH service parameters. | |
Once you select a logical pool, the Physical Pool: Logical Pool Tab Configuration dialog box displays the current configuration of the logical pool. The following rules apply to logical pools:
In their initial state, discovered resources (LIM and CAP ATU-C ports) are in their respective unassigned windows. Only LIM and CAP ATU-C ports within a physical pool are candidates for assignment to a logical pool, belonging to that physical pool.
The list-boxes on the bottom third of the Physical Pool: Logical Pool dialog box display unassigned LIM ports and CAP ATU-C modem ports, respectively. The LIM ports are in the left-hand box, and the CAP ATU-C modem ports are in the right-hand box. Figure 3-9 shows the assignment of ports to logical pools.
ViewRunner for Windows also supports a multiple-drag-and-drop feature. To use this feature, select a sequential range of ports by first left-clicking the beginning port and then pressing the Shift key while you left-click the last port in the range.
To select nonsequential list-box ports, press the Ctrl key while you left-click the ports to be selected.
Each list-box displays the port's access identifier (AID). The AID includes the chassis type and number, slot number, and port number and uniquely identifies its location within the Cisco 6100 Series system. Additionally, ViewRunner displays each port and supporting module's Administrative state and Service state. In the case of LIM ports, the associated subscriber's Administrative state is also displayed. That field is blank if no subscriber is configured for the
LIM port.
Each LIM port must have a subscriber ID associated to it. You can add a new subscriber or modify or delete an existing subscriber. If a subscriber is already associated with a port, a Subscriber ID is displayed in both the Port and Subscriber Configuration dialog boxes.
You can add, modify, or delete a subscriber, from the LIM Properties dialog box, following
this procedure:
Step 1 To access the LIM Properties dialog box, move the cursor down to a LIM in the Chassis View and right-click the LIM. The menu shown in Figure 3-10 appears.
Step 2 Highlight the appropriate port properties.
Step 3 Select Configuration. The LIM Properties dialog box appears (Figure 3-11).
Table 3-2 describes the fields and buttons in the LIM Properties dialog box.
| Field | Description |
|---|---|
Administrative State | Displays the status of the Administrative state, either Unlocked or Locked. Defaults |
Allows configuration of a unique subscriber identifier. | |
Allows configuration of a unique identifier assigned to this copper local loop circuit. | |
Displays the physical pool to which this LIM port belongs. | |
Displays the logical pool to which this LIM port belongs. | |
| Button | Description |
Allows you to edit the logical pool with which this LIM port is associated. | |
Allows you to add a subscriber to this LIM port. Note This button changes to Edit Subscriber if you are viewing a specific subscriber. |
After you open the LIM Properties dialog box, you can add a subscriber to that module using the Subscriber Properties dialog box.
To access the Subscriber Properties dialog box, click Add Subscriber. The Subscriber Properties dialog box appears (Figure 3-12).
Table 3-3 provides field descriptions for the Subscriber Properties dialog box.
:
| Field | Description |
|---|---|
Displays the Administrative state of the subscriber. Can be Locked | |
Subscriber ID is a required ViewRunner for Windows field that must contain 1 to 20 alphanumeric characters. ViewRunner for Windows does not guarantee the uniqueness of subscriber IDs. ViewRunner for Windows recognizes and displays subscribers created with null subscriber IDs, but does not allow modification of subscriber configuration parameters unless an alphanumeric character has been entered. Note If you input more that 20 characters for the subscriber ID, thesystem beeps, beginning with the 21st character, informing you of excessive field length. Subscriber ID is a nonservice-affecting parameter for the Cisco 6100 | |
| Subscriber Association to Port Group Box | |
Circuit ID | Allows configuration of an identifier assigned to the local loop. |
Displays the module and port associated with this subscriber. | |
| Service Configuration Group Box | |
Limits the maximum trained rate of a subscriber's modem. List-boxes allow selection of the valid configuration settings, measured in kbps. The up and down selections are completely independent of one another. See "System Operation and Performance with a Digital Off-Hook Configuration," for more information on training. Note In Release 2.4.0, the number of upstream/downstream payload combinations is increased with the addition of support for 136 kilobaud. | |
Margin Configuration (Upstream and Downstream) | Allows you to associate an upstream and a downstream margin value with a subscriber. See the "Bit Error Rate and Noise Margin" section for more information on setting the margins. Note Increasing the margins could cause a line not to train. A warning dialog box appears when you try to change the noise margin. The default margin configuration is 6 dB up and 3 dB down. |
To add a subscriber, follow this procedure:
Step 1 Enter the name of the subscriber in the Subscriber ID field.
Step 2 Select the maximum allowed downstream and upstream rates from the drop-down menu.
Step 3 Enable or disable the 136 kilobaud feature.
Step 4 Set or change the timers and their respective values.
Step 5 Click OK or Apply to save additions.
Step 6 Repeat for every subscriber you want to add.
You can add subscribers only when a subscriber does not exist for the port. This prevents the assignment of more than one subscriber ID for each LIM port.
To modify subscriber information, follow this procedure:
Step 1 Enter the name of the subscriber in the Subscriber ID field.
Step 2 Select the maximum allowed downstream and upstream rates from the drop-down menu.
Step 3 Enable or disable the 136 kilobaud feature.
Step 4 Enable or disable the CPE signature feature. (Set or change the signature within a 0 to 127 range.)
Step 5 Set or change the timers and their respective values.
Step 6 Click OK or Apply for the changes to take effect.
To delete a subscriber, follow this procedure:
Step 1 Enter the name of the subscriber in the Subscriber ID field.
Step 2 Click Delete Now.
Step 3 Click Yes for the changes to take affect.
You can configure idle session times from the ViewRunner Preferences dialog box and subscriber defaults from the Subscriber Defaults dialog box. The Subscriber Defaults dialog box opens when you click the Subscriber Defaults button on the ViewRunner Preferences dialog box.
To set the simple network management protocol (SNMP) timeout value for a session or for idle time, select Options > ViewRunner Preferences. The ViewRunner Preferences dialog box appears (Figure 3-13).
To configure
follow these steps
Step 1 Click Subscriber Defaults on the ViewRunner Preferences dialog box.
Step 2 The Subscriber Default dialog box opens (Figure 3-14).
Step 3 Configure trained rates and noise margins for the type of module you have selected CAP ATU-C, DMT-2 ATU-C or STU-C.
Each subscriber can have multiple permanent virtual circuits (PVCs) provisioned. Each PVC contains both a network side and a subscriber side virtual connection that are known as VCCs. Each VCC has both a VPI and VCI.
The following are the rules for configuring VPCs:
See "Cisco 6100 Series System ATM Addressing Guidelines," for more information on configuring VCCs.
Use the following procedure to define VPI/VCI addresses for subscribers:
Step 1 Click the Service Provisioning tab from the Subscriber Properties dialog box. The Service Provisioning dialog box appears (Figure 3-15).
Step 2 Confirm that the subscriber's Administrative state is Locked.
Table 3-4 provides field descriptions for the Subscriber Properties: Service Provisioning dialog box.
:
| Field | Description |
|---|---|
Subscriber ID | Displays (read only) the subscriber associated with the permanent virtual |
Subscriber VPI/VCI | Displays the current subscriber's virtual path identifier (VPI) and virtual circuit identifier (VCI). |
Displays the network's VPI and VCI. | |
Priority queue support applies to CAP ATU-C modules. The number 1 represents the lowest delay and highest line availability. | |
When the subscriber is locked, you can edit the PVC VPI/VCI values and click Add Now to create a new PVC for the subscriber and add it to the PVC connection list, subject to PVC configuration rules. Press Delete Now to delete the PVC selected in the PVC connection list. The network and subscriber side VPI/VCI list-boxes allow selection of valid VPI and VCI combinations, subject to PVC configuration rules (see the "DOH VPC Configuration Rules" section). |
Step 3 Enter the VCI/VPI information in the available fields under the Subscribe and Network group boxes. The subscriber side VPI field is not editable.
Step 4 Click Add Now. ViewRunner immediately creates the subscriber PVC.
Step 5 Repeat steps 1 through 4 for every VCI/VPI address you want to define.
Step 6 Click Close.
To delete subscriber PVCs, follow this procedure:
Step 1 At the Service Provisioning dialog box, left-click the subscriber PVC you want to delete.
Step 2 Click Delete Now. Clicking Delete Now opens a Delete Confirmation dialog box.
Step 3 Select Yes in the Delete Confirmation dialog box. ViewRunner deletes the
subscriber PVC.
Step 4 Repeat steps 1 through 3 for every PVC you want to delete.
Step 5 Click Close.
Before you enter an address, you can obtain information from ViewRunner regarding valid and invalid VPI and VCI numbers. ViewRunner for Windows also generates an error dialog box when it detects a network-side address duplication.
Once you have assigned VPIs and VCIs to subscribers, you can provide multiple destinations by assigning additional VCs to a subscriber.
Up to this point in this chapter you have entered and verified all logical pool, port, subscriber, and VCI/VPI data. Now, you can unlock entities to put them into service. Unlocking requires clicking the Unlocked option in various dialog boxes and clicking the Apply button.
Putting a logical pool and provisioned subscriber into service requires unlocking these
associated entities:
To unlock a module, use the following procedure:
Step 1 Right-click the CAP ATU-C module and select Module Properties > Configuration. Figure 3-16 displays the Module Properties drop-down menu.
Selecting the Configuration menu option causes the CAP ATU-C Module Properties dialog box to open (Figure 3-17).
Step 2 Click Unlocked.
Step 3 Click Apply. ViewRunner unlocks that module for service.
Step 4 Click OK to return to the Chassis View.
To unlock a port, follow this procedure:
Step 1 Right-click an CAP ATU-C module and select Port Properties > Configuration (Figure 3-18). The CAP ATU-C Module Properties dialog box appears (Figure 3-19).
Step 2 Click Unlocked.
Step 3 Click Apply. ViewRunner unlocks that port for service.
Step 4 Click OK to return to the Chassis View.
To unlock a subscriber, follow this procedure:
Step 1 Position the cursor on the LIM port you want to unlock.
Step 2 Right-click Port Properties > Configuration (Figure 3-20).
The Port Properties dialog box appears (Figure 3-21).
Step 3 Click Edit Subscriber. The Subscriber Properties dialog box appears (Figure 3-22).
Step 4 Click Unlocked.
Step 5 Click Apply. ViewRunner unlocks the subscriber for service.
Step 6 Click OK to return to the LIM Properties dialog box. The subscriber is now unlocked for service.
Once you have unlocked a subscriber, you are ready to use the Cisco 6100 Series system.
If you are subtending Cisco 6100 Series systems, you provision the local DOH subscribers just as you provision any Cisco 6100 Series system according to the directions in the preceding sections. However, you must also provision transit subscribers on the subtended ports of the subtending host Cisco 6100 Series system.
For example,
You can create multiple transit subscribers on one port because transit subscribers on the host Cisco 6100 Series system are simply logical containers for traffic coming from the subtended Cisco 6100 Series system.
You can define four VCCs per subscriber line coming in from the subtended Cisco 6100 Series system. All VPIs/VCIs must be unique on any one NI, subtended or not, and they must be the same on both ingress and egress.
Subscribers from the subtended node can be assigned across VCCs on the subtending host Cisco 6100 Series system. That is, all subscribers from a subtended node can be assigned to VCC 1, or they can be spread across all 32 VCCs. You group subscribers as you choose. For example, if you assign all subscribers from one subtended node to one VCC on the subtending host, you can lock all those subscribers at one time, if you need to bring the subtended node down for any reason.
Figure 3-23 shows the Transit Subscriber Service Provisioning dialog box that you can access from the subtending host module. Notice that the dialog box is similar to the local Service Provisioning dialog boxes, but the subscriber side VPI/VCI connection fields read
"Transit Subscriber."
You provision the transit subscriber in the Transit Subscriber Service Provisioning dialog box just as you did that subscriber on the subtended Cisco 6100 Series system.
See the "Associating Subscriber IDs to LIM Ports" section for more information.
Posted: Tue Oct 12 08:10:35 PDT 1999
Copyright 1989-1999©Cisco Systems Inc.