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In a digital subscriber line (DSL) environment, many applications require the configuration of a large number of ATM permanent virtual circuits (PVCs). The ATM PVC RangeSubinterface Grouping feature enables you to group a number of PVCs together into a PVC range in order to configure them all at once.
You cannot explicitly configure the individual point-to-point subinterfaces created by the PVC range on a point-to-point subinterface. All of the point-to-point subinterfaces in the range share the same configuration as the subinterface on which the PVC range is configured.
For applications that use multipoint subinterfaces, such as PPP over Ethernet and PPP over ATM, the PVC range is on a single multipoint subinterface.
A PVC range is defined by two VPI-VCI pairs. The two virtual path identifiers (VPIs) define a VPI range, and the two virtual channel identifiers (VCIs) define a VCI range. The number of PVCs in the PVC range equals the number of VPIs in the VPI range multiplied by the number of VCIs in the VCI range.
Once the PVC range is defined, you can configure the range by using the existing interface-ATM-VC configuration commands that are also supported in PVC range configuration mode. The shutdown PVC range command can be used to deactivate the range without deleting the configuration.
The ATM PVC Range feature also introduces the pvc-in-range command, which allows you to explicitly configure an individual PVC within the defined range of PVCs on a multipoint subinterface. The shutdown PVC-in-range command allows you to deactivate an individual PVC within a range.
 Note |
You cannot explicitly configure the individual point-to-point subinterfaces created by the PVC range on a point-to-point subinterface. All of the point-to-point subinterfaces in the range share the same configuration as the subinterface on which the PVC range is configured. |
Configuring a range of PVCs is faster than configuring each PVC individually.
A range of PVCs takes up less NVRAM on network service routers than a large number of individually configured PVCs.
The parser can parse one configuration command instead of many, thus speeding bootup time.
Note |
For point-to-point subinterfaces, subinterface numbering begins with the subinterface on which the PVC range is configured and increases sequentially through the range. |
| Command or Action | Purpose | |
|---|---|---|
|
Step 1 |
Router(config)# interface atm slot/port.subinterface-number {point-to-point | multipoint } |
Configures an ATM subinterface and enters subinterface configuration mode. |
|
Step 2 |
Router(config-subif)# range [range-name ] pvc start-vpi /start-vci end-vpi /end-vci |
Defines a range of PVCs and enables PVC range configuration mode. The number of PVCs in a range can be calculated using the following formula:
|
|
Step 3 |
Router(config-if-atm-range)# exit |
Exits PVC range configuration mode. |
To deactivate a PVC range, use the following command in PVC range configuration mode:
|
Command |
Purpose |
|---|---|
|
Deactivates a PVC range. |
To configure an individual PVC within a PVC range on a multipoint subinterface, use the following commands beginning in global configuration mode:
| Command or Action | Purpose | |
|---|---|---|
|
Step 1 |
Router(config)# interface atm slot /port.subinterface-number multipoint |
Configures an ATM interface. |
|
Step 2 |
Router(config-subif)# range [range-name ] pvc start-vpi /start-vci end-vpi /end-vci |
Defines a range of PVCs and enables PVC range configuration mode. |
|
Step 3 |
Router(config-if-atm-range)# pvc-in-range [pvc-name ] [vpi /vci ] |
Defines an individual PVC within a PVC range, and enables PVC-in-range configuration mode. |
|
Step 4 |
Router(cfg-if-atm-range-pvc)# exit |
Exits PVC-in-range configuration mode. |
To deactivate an individual PVC within a range, use the following command in PVC-in-range configuration mode:
|
Command |
Purpose |
|---|---|
|
Deactivates an individual PVC within a range. |
To verify ATM PVC range configuration, use the following EXEC command:
|
Command |
Purpose |
|---|---|
|
Displays ATM PVCs and traffic information. |
In the following example, a PVC range called "range-pppoa-1" is created with a total of 500 PVCs in the range. PVC parameters are configured for the range, including the assignment of a VC class called "classA."
Router(config)# interface atm 6/0.110 multipoint
Router(config-subif)# range range-pppoa-1 pvc 100 4/199
Router(config-if-atm-range)# class-range classA
Router(config-if-atm-range)# ubr 1000
Router(config-if-atm-range)# encapsulation aal5snap
Router(config-if-atm-range)# protocol ppp virtual-template 2
In the following example, "pvc1" within the PVC range called "range1" is deactivated.
Router(config)# interface atm 6/0.110 multipoint
Router(config-subif)# range range1 pvc 100 4/199
Router(config-if-atm-range)# class-range classA
Router(config-if-atm-range)# pvc-in-range pvc1 3/104
Router(cfg-if-atm-range-pvc)# shutdown
|
Related Topic |
Document Title |
|---|---|
|
Configuring ATM |
"Configuring ATM" chapter in the Cisco IOS Asynchronous Transfer Mode Configuration Guide |
|
Description |
Link |
|---|---|
|
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The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.|
Feature Name |
Releases |
Feature Information |
|---|---|---|
|
ATM PVC Range |
12.1(5)T 12.2(28)SB XE 2.5.0 |
The ATM PVC Range Subinterface Grouping feature enables you to group a number of PVCs together into a PVC range in order to configure them all at once. In 12.1(5)T, this feature was introduced on the Cisco 7200. The following commands were introduced or modified: class-range, oam-range, pvc-in-range, range pvc, shutdown(PVC-in-range), shutdown(pvc-range) . |
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