Cisco ASR1002-10G-VPN/K9 Software Guide - Page 209

6 C H A P T E R Broadband Scalability and Performance The infrastructure of a service provider must be capable of supporting the services that an enterprise customer or Internet service provider (ISP) wants to offer its subscribers. The service provider must also be able to scale up to an expanding subscriber base. You can configure the Cisco ASR1000 Series Routers for high broadband scalability. This chapter provides information about the following topics: • PPP Sessions and L2TP Tunnel Scaling, page 6-1 • IP Sessions Scaling, page 6-3 • Layer 4 Redirect Scaling, page 6-3 • Configuring the Cisco ASR 1000 Series Router for High Scalability, page 6-3 • Using the cisco-avpair="lcp:interface-config" RADIUS Attribute, page 6-6 PPP Sessions and L2TP Tunnel Scaling The ASR 1000 Series Routers are deployed in a variety of broadband deployment models for terminating Point-to-Point Protocol (PPP) Sessions and initiating or terminating Layer 2 Tunneling Protocol (L2TP) tunnels. The maximum number of PPP sessions and L2TP tunnels is dependent on the hardware combination. Table 6-1 lists the hardware combinations and the maximum number of PPP sessions and L2TP tunnels that are supported in Cisco IOS XE Release 3.3. For information about the restrictions for PPP sessions and L2TP tunnel scaling, see the "Restrictions for PPP Sessions and L2TP Tunnel Scaling" section on page 6-2. Table 6-1 Maximum Number of PPP Sessions and L2TP Tunnels Supported on ASR 1000 Hardware Chassis 1001 1002 1004, 1006 1004, 1006 1004, 1006, 1013 RP Integrated Integrated RP1 RP1 RP2 RP2 ESP ESP-2.5G or ESP-5G ESP-5G ESP-10G or ESP-20G ESP-20G ESP-40G PPP Session 8000 L2TP Tunnel 4000 12000 6000 24000 12000 32000 320001, 48000, or 64000 16000 64000 OL-16506-10 Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide 6-1