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    Configuring QoS on the Broadband Gateway Overview

    Configuring quality of service (QoS) on the MobileNext BroadBand Gateway for a 3G or 4G network is a multistep process in which you configure the resource threshold profiles, classifier profiles, and CoS policy profiles that are then specified in local policies to provide call admission control (CAC) and prioritization of subscriber traffic when the network load increases.

    The following steps describe the high-level process for configuring QoS for 3G and 4G networks:

    1. Configure the number of bearers at the system level or access point name (APN) level.
    2. Configure bandwidth pools (and optionally the percentage of bandwidth to allocate to real-time traffic) for negotiating and reserving bandwidth.

      You can specify the both keyword to allocate the same bandwidth, unilaterally, for uplink and downlink subscriber traffic, or optionally, configure separate bandwidth pools to allocate bandwidth independently for uplink and downlink subscriber traffic.

    3. Configure preemption at the system level to enable preemption for GTPv2 packets. For GTPv1 packets, you can enable preemption capability and preemption vulnerability independently.

      Note: Preemption is disabled by default.

    4. Configure a resource threshold profile to define call admission control to manage load thresholds for the number of bearers, system load, memory load, and CPU load.
    5. Configure a classifier profile—Each traffic class or traffic handling priority (3G) and QoS Class Identifier (QCI) (4G) is mapped to a forwarding class and packet loss priority.

      Note: You can configure separate classifier profiles for home, roaming, and visitor subscriber traffic.

    6. Configure a class-of-service (CoS) policy profile to define how traffic is divided into classes and specify whether to upgrade or limit bearer requests based on availability of system resources.

      Note: You can configure separate CoS policy profiles for home, roaming, and visitor subscriber traffic.

    7. Configure a local policy to define overall QoS treatment for subscriber traffic in 3G networks or 4G networks. A local policy includes the configuration of bandwidth pools (for uplink and downlink), classifier profiles, a resource threshold profile, and CoS policy profiles. You can configure separate CoS policy profiles for home, roaming, and visitor subscriber traffic.

      Note: You can configure multiple classifier profiles and CoS policy profiles to address QoS configuration requirements for home, roaming, and visitor subscriber traffic.

    8. Apply a local policy at the system level or APN level.
    9. Configure ingress and egress rewrite rules for upstream and downstream subscriber traffic.
    10. Apply ingress and egress rewrite rules on mobile interfaces to provide Differentiated Services code point (DSCP) marking for upstream and downstream subscriber traffic.

    Published: 2011-11-17