Cisco ASR 5000 Series User Manual

HRPD Serving Gateway Overview
▀ Features and Functionality - Optional Enhanced Feature Software
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
Features and Functionality - Optional Enhanced Feature
Software
This section describes the optional enhanced features and functions for the S-GW service.
Each of the following features require the purchase of an additional license to implement the functionality with the S-
GW service.
This section describes following features:
IP Header Compression (RoHCv1 for IPv6)
IP Security (IPSec)
Traffic Policing and Shaping
Layer 2 Traffic Management (VLANs)
IP Header Compression (RoHCv1 for IPv6)
Dynamic header compression contexts enable more efficient memory utilization by allocating and deleting header
compression contexts based on the presence/absence of traffic flowing over an S067 A10 bearer connection.
In order to provision VoIP services over an e-HRPD network the StarOS 9.0 release adds support for ROHC
compression contexts over IPv6 datagrams using the RTP profile over S067 auxiliary A10' connections. The e-HRPD
application uses pre-established SO67 A10' connections for VoIP bearers. A header compression context is allocated for
the first time when a new SO67 A10' connection request comes with negotiated ROHC parameters.
In order to optimize memory allocation and system performance, the HSGW uses configured inactivity time of traffic
over the bearer to dynamically determine when the ROHC compression context should be removed. This feature is also
useful for preserving compression contexts on intra-HSGW call hand-offs. The dynamic header compression context
parameters are configured in the ROHC profile that is associated with the subscriber session.
Important: For more information on IP header compression support, refer IP Header Compression chapter in
System Enhanced Feature Configuration Guide.
IP Security (IPSec)
IP Security provides a mechanism for establishing secure tunnels from mobile subscribers to pre-defined endpoints (i.e.
enterprise or home networks) in accordance with the following standards:
RFC 2401, Security Architecture for the Internet Protocol
RFC 2402, IP Authentication Header (AH)

Cisco ASR 5000 Series Specifications

General

Brand	Cisco
Model	ASR 5000 Series
Category	Network Router
Language	English