Cisco Systems 1000 Series Manual De Usuario

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.

Your software release might not support all the features documented in this module. For the latest feature 
information and caveats, see the release notes for your platform and software release. To find information 
about the features documented in this module, and to see a list of the releases in which each feature is 
supported, see the 

.

Use Cisco Feature Navigator to find information about platform support and Cisco software image 
support. To access Cisco Feature Navigator, go to 

. An account on 

Cisco.com is not required.

This guide provides information about the following topics:

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. 

 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 

.