Cisco Cisco IOS Software Releases 12.2 B

The number of PVCs that can be established on an interface that is configured as an infinite range is 
limited to the maximum number of VCs that the platform can support.

Autoprovisioned ATM PVCs are not created until there is activity on the virtual path identifier 
(VPI)/virtual channel identifier (VCI) pair. When the interface is disabled and reenabled using the 
shutdown and no shutdown commands, autoprovisioned PVCs that are part of a PVC range or infinite 
range are removed upon shutdown and are not reestablished until the first incoming packet triggers PVC 
creation. During router reload, autoprovisioned PVCs are created when there is activity on the 
connection.

The total number of VCs that can be configured on an ATM port adapter is limited by the capacity of 
port adapter. In cases of ATM link oversubscription, where a PVC range or infinite range is configured 
to provision more PVCs than the port adapter allows, the PVCs can be configured with a timeout so that 
they can be dynamically brought down as needed. When the timeout expires, the idle PVCs are removed, 
allowing the PVC range or infinite range of PVCs to share system resources.

ATM PVC local autoprovisioning supports the following applications: PPP over ATM, PPP over 
Ethernet, ATM routed bridge encapsulation, and routed RFC 1483.

The Local Template-Based ATM Provisioning feature enables ATM PVCs to be created automatically 
as needed from a local configuration, making the provisioning of large numbers of digital subscriber line 
(DSL) subscribers easier, faster, and less prone to error.

See the following sections for configuration tasks for the Local Template-Based ATM Provisioning 
feature. One or more of the first four tasks is required. The last task is optional.