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Configuring the Cisco ASR 1000 Series Router for High Scalability
To ensure high scalability on the Cisco ASR 1000 Series Router, perform the following configuration
tasks:
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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.
Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
6-4
Configuring Call Admission Control, page 6-4
Control Plane Policing, page 6-4
VPDN Group Session Limiting, page 6-5
PPPoE Session Limiting, page 6-5
Monitoring PPP Sessions Using the SNMP Management Tools, page 6-5
Configuring the Access Interface Input and Output Hold Queue, page 6-5
Configuring the keepalive Command, page 6-6
Scaling the L2TP Tunnel Configurations, page 6-6
Chapter 6
Broadband Scalability and Performance
OL-16506-10
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