ATM PVC Range

First Published: November 27, 2000
Last Updated: October 25, 2009

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.

Finding Feature Information

For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the "Feature Information for ATM PVC Range" section.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS XE software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Contents

•Restrictions for ATM PVC Range

•Information About Restrictions for ATM PVC Range

•How to Configure ATM PVC Range

•Configuration Examples for ATM PVC Range

•Additional References

•Feature Information for ATM PVC Range

Restrictions for ATM PVC Range

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.

Information About Restrictions for ATM PVC Range

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.

Benefits of ATM PVC Range

Saving Time

Configuring a range of PVCs is faster than configuring each PVC individually.

Saving NVRAM

A range of PVCs takes up less NVRAM on network service routers than a large number of individually configured PVCs.

Speeding Boot-Up

The parser can parse one configuration command instead of many, thus speeding bootup time.

How to Configure ATM PVC Range

•Configuring an ATM PVC Range (Required)

•Deactivating a PVC Range (Optional)

•Configuring an Individual PVC Within a PVC Range (Optional)

•Deactivating an Individual PVC Within a PVC Range (Optional)

•Verifying an ATM PVC Range (Optional)

Configuring an ATM PVC Range

To configure an ATM PVC range, use the following commands beginning in global configuration mode:

 
Command
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.

Step 3 

Router(config-if-atm-range)# exit

Exits PVC range configuration mode.

The number of PVCs in a range can be calculated using the following formula:

number of PVCs = (end-vpi - start-vpi + 1) x (end-vci - start-vci +1).

The start-vpi argument may be omitted if it is zero. The end_vpi argument may be omitted, but if it is omitted, it is assigned the value of start-vpi. The end-vpi and end-vci arguments are always greater than or equal to start-vpi and start-vci, respectively.

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.

Deactivating a PVC Range

To deactivate a PVC range, use the following command in PVC range configuration mode:

Command
Purpose

Router(config-if-atm-range)# shutdown

Deactivates a PVC range.


Configuring an Individual PVC Within 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
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.

Deactivating an Individual PVC Within a PVC Range

To deactivate an individual PVC within a range, use the following command in PVC-in-range configuration mode:

Command
Purpose

Router(cfg-if-atm-range-pvc)# shutdown

Deactivates an individual PVC within a range.


Verifying an ATM PVC Range

To verify ATM PVC range configuration, use the following EXEC command:

Command
Purpose

Router# show atm pvc [vpi/vci | name | interface atm interface-number]

Displays ATM PVCs and traffic information.


Configuration Examples for ATM PVC Range

•ATM PVC Range on a Multipoint Subinterface: Example

•Individual PVC Within a PVC Range Configuration: Example

ATM PVC Range on a Multipoint Subinterface: Example

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

Individual PVC Within a PVC Range Configuration: Example

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

Additional References

Related Documents

Related Topic
Document Title

Configuring ATM

"Configuring ATM" chapter in the Cisco IOS Asynchronous Transfer Mode Configuration Guide


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Feature Information for ATM PVC Range

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS XE software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Note Table 1 lists only the Cisco IOS XE software release that introduced support for a given feature in a given Cisco IOS XE software release train. Unless noted otherwise, subsequent releases of that Cisco IOS XE software release train also support that feature.

Table 1 Feature Information for ATM PVC Range and RBE Subinterface Grouping 

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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