Features And Functionality - Optional Enhanced Software Features - Cisco ASR 5000 series Product Overview

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▀ Features and Functionality - Optional Enhanced Software Features

Features and Functionality - Optional Enhanced Software

This section describes the optional enhanced features and functions for PDSN service.

Each of the following features require the purchase of an additional license to implement the functionality with the

PDSN service.

This section describes following features:

Session Recovery Support

IPv6 Support

L2TP LAC Support

L2TP LNS Support

Proxy Mobile IP

IP Security (IPSec)

Traffic Policing and Rate Limiting

Dynamic RADIUS Extensions (Change of Authorization)

Web Element Management System

Session Recovery Support

The Session Recovery feature provides seamless failover and reconstruction of subscriber session information in the

event of a hardware or software fault within the system preventing a fully connected user session from being

disconnected.

Session recovery is performed by mirroring key software processes (e.g. session manager and AAA manager) within the

system. These mirrored processes remain in an idle state (in standby-mode), wherein they perform no processing, until

they may be needed in the case of a software failure (e.g. a session manager task aborts). The system spawns new

instances of ―standby mode‖ session and AAA managers for each active Control Processor (CP) being used.

Additionally, other key system-level software tasks, such as VPN manager, are performed on a physically separate

Packet Services Card (PSC) to ensure that a double software fault (e.g. session manager and VPN manager fails at same

time on same card) cannot occur. The PSC used to host the VPN manager process is in active mode and is reserved by

the operating system for this sole use when session recovery is enabled.

The additional hardware resources required for session recovery include a standby System Processor Card (SPC) and a

standby PSC.

There are two modes for Session Recovery.

▄ Cisco ASR 5000 Series Product Overview

CDMA2000 Wireless Data Services