Cisco 10000-2P2-2DC Software Guide - Page 244
Local Template-Based ATM PVC Provisioning
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ATM PVC Autoprovisioning Chapter 8 Configuring ATM Permanent Virtual Circuit Autoprovisioning • Configuration Tasks for ATM PVC Autoprovisioning, page 8-6 • Monitoring and Maintaining ATM PVC Autoprovisioning, page 8-12 • Configuration Example for ATM PVC Autoprovisioning, page 8-13 Local Template-Based ATM PVC Provisioning The Local Template-Based ATM PVC Provisioning feature supports PVC autoprovisioning for an infinite range of VPI/VCI combinations on an ATM interface. The Local Template-Based ATM PVC Provisioning feature enables ATM permanent virtual circuits (PVCs) to be provisioned 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. ATM PVC autoprovisioning can be configured on a PVC, an ATM PVC range, or a VC class. If a VC class configured with ATM PVC autoprovisioning is assigned to the main interface, all the PVCs on that main interface will be autoprovisioned; this configuration is sometimes referred to as an infinite range. In releases earlier than Cisco IOS Release 12.3(7)XI2, a reassembly channel had to be opened to receive any incoming packets on a create-on-demand VC. In Cisco IOS Release 12.3(7)XI2, the SAR sends the cell header to the RP, thus removing the need to open the reassembly channel to receive cells. Any cells received on an unopened channel result in cell headers from the SAR until the VC is opened. 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 re-enabled 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 cell triggers PVC creation. During router reload, autoprovisioned PVCs are created when there is activity on the connection. Feature History for Local Template-Based ATM PVC Provisioning Cisco IOS Release 12.3(7)XI2 12.2(28)SB Description This feature was introduced on the Cisco 10000 series router. This feature was integrated into Cisco IOS Release 12.2(28)SB. Required PRE PRE2 PRE2 ATM Interface Oversubscription The Cisco 10000 series router allows you to create more on-demand PVCs than the chassis allows to be active at the same time. For example, the router chassis allows a total of 61,500 PVCs to be up at the same time, even though you can configure more than 61,500 on-demand PVCs on the chassis. In actuality, you can configure up to 32,000 PVCs on each line card. If you install ATM line cards in six of the eight available slots in the chassis, you can configure up to 128,000 on-demand PVCs instead of the 61,500 PVCs chassis limit. When the number of ATM PVCs exceeds a port's active VC count, you can use the idle-timeout interface command to dynamically bring down on-demand PVCs. If you use CLI commands to explicitly configure a PVC, the router brings the PVC to the inactive state when the idle-timeout timer expires. Cisco 10000 Series Router Software Configuration Guide 8-2 OL-2226-23
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