WMM QoS Mode 337

You also can use ACLs to override marking for specific packets. Configure ACEs that use the dscp option to match on ingress DSCP value, and use the cos option to mark CoS. A CoS value assigned by an ACE overrides the internal CoS value. (For information, see “Using ACLs to Change CoS” on page 399.)

WMM QoS on a MAP MAPs use forwarding queues to prioritize traffic for wireless clients.

For a packet received by the MAP from a client, the MAP classifies the packet based on the service type in the 802.11 header and maps the service type value to an internal CoS value. The MAP then marks the DSCP value in the IP tunnel header to the WX switch based on the internal CoS value.

For a packet received from a WX switch and addressed to a client, the MAP classifies the packet by mapping the DSCP value in the IP tunnel header to an internal CoS value. The MAP then assigns the packet to a forwarding queue based on the internal CoS value. The MAP also marks the service type in the 802.11 header based on the internal CoS value.

A MAP uses the DSCP-to-CoS and CoS-to-DSCP mappings of the WX switch that is managing it. If you change mappings on a WX switch, the change also applies to the MAP. Likewise, if a MAP changes to another WX switch (for example, after a MAP restart), the MAP uses the mappings in effect on the new WX.

If the use-client-dscpoption is enabled for a service profile, WMM QoS is ignored, and the QoS level is classified based on the DSCP value.

802.11data packets without WMM are classified as QoS level 0 unless static CoS is enabled or the use-client-dscpoption is enabled.

Table 28 lists the default mappings between a MAP’s internal CoS values and its forwarding queues.

Table 28 Default CoS-to-MAP-Forwarding-Queue Mappings

CoS

MAP Forwarding Queue

 

 

1 or 2

Background

 

 

0 or 3

Best Effort

 

 

4 or 5

Video

 

 

6 or 7

Voice

 

 

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3Com WX4400 3CRWX440095A, WXR100 3CRWXR10095A manual Default CoS-to-MAP-Forwarding-Queue Mappings, CoS MAP Forwarding Queue
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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.

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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.

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