340CHAPTER 16: CONFIGURING QUALITY OF SERVICE

In this example, the MAP places the packet in the Voice forwarding queue. The Voice queue has statistically more access to the air than the other queues, so the user’s voice traffic receives priority treatment.

SVP QoS Mode

The SVP QoS mode optimizes forwarding of SVP traffic by setting the random wait time a MAP radio waits before transmitting the traffic to 0 microseconds.

Normally, a MAP radio waits an additional number of microseconds following the fixed wait time, before forwarding a queued packet or frame. Each forwarding queue has a different range of possible random wait times. The Voice queue has the narrowest range, whereas the Background and Best Effort queues have the widest range. The random wait times ensure that the Voice queue gets statistically more access to the air than the other queues.

By setting the random wait time to 0 for SVP, the SVP QoS mode provides SVP traffic the greatest possible access to the air, on a statistical basis. The QoS mode affects forwarding of SVP traffic only. The random wait times for other types of traffic are the same as those used when the QoS mode is WMM.

Call Admission Call Admission Control (CAC) is an optional feature that helps ensure that Control high-priority clients have adequate bandwidth, by limiting the number of

active sessions MAP radios can have for an SSID. For example, you can limit the number of active sessions on a VoIP SSID to ensure that each call receives the bandwidth required for quality voice service.

You can use CAC with either QoS mode (WMM or SVP).

CAC is disabled by default. You can enable session-based CAC on a service-profile basis. When enabled, CAC limits the number of active sessions a radio can have to 14 by default. You can change the maximum number of sessions to a value from 0 to 100.

CAC is configured on a service profile basis and limits association to radios only for the service profile’s SSID. Association to the radios by clients on other SSIDs is not limited. To ensure voice quality, do not map other service profiles to the radio profile you plan to use for voice traffic.

(To configure CAC, see “Configuring Call Admission Control” on page 343.)

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3Com WXR100 3CRWXR10095A, WX4400 3CRWX440095A SVP QoS Mode, To configure CAC, see Configuring Call Admission Control on
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WX1200 3CRWX120695A, WX4400 3CRWX440095A, WXR100 3CRWXR10095A, WX2200 3CRWX220095A specifications

The 3Com WX2200 (3CRWX220095A), WX4400 (3CRWX440095A), WX1200 (3CRWX120695A), and WXR100 (3CRWXR10095A) are part of a robust suite of wireless networking solutions offered by 3Com, designed to meet the needs of modern enterprise environments. These devices provide reliable connectivity, flexibility, and scalability, making them ideal for businesses of all sizes.

The 3Com WX2200 is a high-performance wireless switch that supports up to 64 access points, making it suitable for medium to large deployments. It boasts advanced features such as dynamic RF management, which optimizes channel selection and power levels based on real-time network conditions. This ensures maximum coverage and minimizes interference, leading to improved user experiences. Additionally, it supports dual-band operation and can seamlessly integrate with various wireless access points, providing enhanced throughput and robust performance.

The WX4400 is designed for high-density environments and offers extensive scalability. It supports up to 128 access points and is equipped with advanced security features, including WPA2 enterprise encryption and role-based access control. This switch also features intelligent load balancing, allowing it to dynamically distribute user traffic across available access points, thus enhancing overall network efficiency.

The WX1200, positioned as an entry-level solution, is well-suited for small to medium-sized businesses. It offers a user-friendly management interface, allowing IT staff to quickly configure and monitor the network. This device supports a variety of deployment scenarios and can be easily integrated into existing infrastructure. It also comes equipped with essential security features to protect the network from unauthorized access.

The WXR100 complements the series by providing simplified management for access points, ensuring that businesses can easily deploy and maintain their wireless networks. It supports various management protocols and integrates with a variety of third-party systems, enhancing inter-operability. With Power over Ethernet (PoE) support, the WXR100 can deliver power to connected access points, reducing the complexity and costs associated with additional power infrastructure.

Together, these solutions embody 3Com's commitment to delivering high-quality networking products that enhance connectivity and performance. With features such as scalability, advanced security, dynamic load balancing, and centralized management, the WX2200, WX4400, WX1200, and WXR100 form a comprehensive wireless networking ecosystem tailored for today’s enterprise challenges.
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