PDN Gateway Overview
▀ Features and Functionality - Inline Service Support
▄ Cisco ASR 5x00 Packet Data Network Gateway Administration Guide
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Subscriber‘s IMSI
Subscriber‘s IP address
S-GW IP address (in clear text)
X-Header encryption enhances the header enrichment feature by increasing the number of fields that can be supported
and through encryption of the fields before inserting them.
The following limitations to insertion of x-header fields in WSP headers apply:
x-header fields are not inserted in IP fragmented packets before StarOS v14.0.
In case of concatenated request, x-header fields are only inserted in first GET or POST request (if rule matches
for the same). X-header fields are not inserted in the second or later GET/POST requests in the concatenated
requests. For example, if there is ACK+GET in packet, x-header is inserted in the GET packet. However, if
GET1+GET2 is present in the packet and rule matches for GET2 and not GET1 x-header is still inserted in
GET2. In case of GET+POST also, x-header is not inserted in POST.
In case of CO, x-header fields are not inserted if the WTP packets are received out of order (even after proper
reordering).
If route to MMS is present, x-headers are not inserted.
x-headers are not inserted in WSP POST packet when header is segmented. This is because POST contains
header length field which needs to be modified after addition of x-headers. In segmented WSP headers, header
length field may be present in one packet and header may complete in another packet.
Mobile Video Gateway
The Cisco ASR 5x00 chassis provides mobile operators with a flexible solution that functions as a Mobile Video
Gateway in 2.5G, 3G, and 4G wireless data networks.
The Cisco Mobile Video Gateway consists of new software for the ASR 5x00. The Mobile Video Gateway is the central
component of the Cisco Mobile Videoscape. It employs a number of video optimization techniques that enable mobile
operators to enhance the video experience for their subscribers while optimizing the performance of video content
transmission through the mobile network.
The Mobile Video Gateway features and functions include:
DPI (Deep Packet Inspection) to identify subscriber requests for video vs. non-video content
Transparent video re-addressing to the Cisco CAE (Content Adaptation Engine) for retrieval of optimized video
content
CAE load balancing of HTTP video requests among the CAEs in the server cluster
Video optimization policy control for tiered subscriber services
Video white-listing, which excludes certain video clips from video optimization
Video pacing for “just in time” video downloading
TCP link monitoring
Dynamic inline transrating
Dynamically-enabled TCP proxy
Traffic performance optimization
N+1 redundancy support
SNMP traps and alarms (threshold crossing alerts)
