Enhanced Features And Functionality; Session Control In Ecs; Service Group Qos Feature - Cisco ASR 5000 Series Administration Manual

▀ Enhanced Features and Functionality

Enhanced Features and Functionality
This section describes enhanced features supported in ECS.
Important:
be required. Contact your Cisco account representative for detailed information on specific licensing requirements. For
information on installing and verifying licenses, refer to the Managing License Keys section of the Software
Management Operations chapter in the System Administration Guide.

Session Control in ECS

In conjunction with the Cisco ASR 5x00 chassis, the ECS provides a high-level network flow and bandwidth control
mechanism in conjunction with the Session Control subsystem. ECS Session Control feature uses the interaction
between SessMgr subsystem and Static Traffic Policy Infrastructure support of the chassis to provide an effective
method to maximize network resource usage and enhancement of overall user experience.
This feature provides the following functionality:
 Flow Control Functionality—Provides the ability to define and manage the number of simultaneous IP-based
sessions and/or the number of simultaneous instances of a particular application permitted for the subscriber.
If a subscriber begins a packet data session and system is either pre-configured or receives a subscriber profile
from the AAA server indicating the maximum amount of simultaneous flow for a subscriber or an application
is allowed to initiate. If subscriber exceeds the limit of allowed number of flows for subscriber or type of
application system blocks/redirect/discard/terminate the traffic.
The following type of flow quotas are available for Flow Control Functionality:
 Subscriber-Level Session Quota—Configurable on a per-rulebase basis
 Application-Level Session Quota—Configurable on a per-charging-action basis
 Bandwidth Control Functionality—Allows the operator to apply rate limit to potentially bandwidth intensive
and service disruptive applications.
Using this feature the operator can police and prioritize subscribers' traffic to ensure that no single or group of
subscribers' traffic negatively impacts another subscribers' traffic.
For example, if a subscriber is running a peer-to-peer (P2P) file sharing program and the system is pre-
configured to detect and limit the amount of bandwidth to the subscriber for P2P application. The system gets
the quota limit for bandwidth from PDP context parameter or individual subscriber. If the subscriber's P2P
traffic usage exceeds the pre-configured limit, the Session Control discards the traffic for this subscriber
session.
Session Control feature in ECS also provides the controls to police any traffic to/from a subscriber/application
with the chassis.

Service Group QoS Feature

The Service Group QoS feature enables the chassis/PCEF to define and enforce Fair-Usage-Policy (FUP) per
subscriber. This enables changing certain charging-action parameters and all QoS-group-of-ruledefs parameters over the
Gx interface per individual subscriber session.
▄ Cisco ASR 5x00 Enhanced Charging Services Administration Guide
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The features described in this section may be licensed Cisco features. A separate feature license may
Enhanced Charging Service Overview