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:
|
|
|
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:
|
|
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:
|
|
|
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:
|
|
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:
|
|
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
Technical Assistance
|
|
The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. |
http://www.cisco.com/techsupport |
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
|
|
|
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). |
Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. A listing of Cisco's trademarks can be found at www.cisco.com/go/trademarks. Third party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1005R)
Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.
© 2000-2009 Cisco Systems, Inc. All rights reserved.