Cisco ASR1006 Configuration Guide - Page 239

Broadband Scalability and Performance Configuring the Cisco ASR 1000 Series Router for High Scalability • Monitoring PPP Sessions Using the SNMP Management Tools, page 6 • Configuring the Access Interface Input and Output Hold Queue, page 6 • Configuring the keepalive Command, page 6 • Scaling the L2TP Tunnel Configurations, page 7 Configuring Call Admission Control The Call Admission Control (CAC) feature is configured to protect the ASR 1000 processing resources that must be configured. CAC can restrict the media bandwidth dedicated to active calls when CPU utilization exceeds the configured threshold. This section provides the following examples for configuring CAC: Example: Configuring a PPPoE Session router(config)# call admission new-model router(config)# call admission limit 1000 router(config)# call admission cpu-limit 80 router(config)# call admission pppoe 10 1 Example: Configuring a PPPoA Session router(config)# call admission new-model router(config)# call admission limit 1000 router(config)# call admission cpu-limit 80 router(config)# call admission pppoa 10 1 Example: Configuring a VPDN Session router(config)# call admission new-model router(config)# call admission limit 1000 router(config)# call admission cpu-limit 80 router(config)# call admission vpdn 10 1 Control Plane Policing The Control Plane Policing feature allows you to configure a QoS filter that manages the traffic flow of control plane packets to protect the control plane of Cisco IOS XE routers and switches against reconnaissance and denial-of-service (DoS) attacks. The control plane thus helps maintain packet forwarding and protocol states despite an attack or heavy traffic load on the router or switch. For examples about configuring the Control Plane Policing feature, see the "Control Plane Policing" section in the Quality of Service Solutions Configuration Guide located at: http://www.cisco.com/en/US/docs/ios-xml/ios/qos_plcshp/configuration/xe-3s/qos-plcshp-ctrl-pln-plc. html Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide 5