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XVI. Traffic Management
Copyright ©2013.Chelsio Communications. All Rights Reserved. Page 205
1. Introduction
Traffic Management capabilities built-in to Chelsio T4 CNAs can shape transmit data traffic
through the use of sophisticated queuing and scheduling algorithms built-in to the T4 ASIC
hardware which provides fine-grained software control over latency and bandwidth parameters
such as packet rate and byte rate. These features can be used in a variety of data center
application environments to solve traffic management problems.
Traffic Management features in Chelsio   s the user to control three main
things:
Guarantee low latency in the presence of other traffic
Control max bandwidth that a connection or a flow (a group of connections) can use
Allocate available bandwidth to several connection or flows based on desired levels of
performance
Once the offload transmit traffic shaping classes have been configured, individual offloaded
connections (flows) may be assigned to a traffic shaping class in order to manage the flows
according to the class configuration. The mechanism to accomplish this "flow to class" mapping
assignment is the Connection Offload Policy (COP) configuration system.
1.1. Hardware Requirements
1.1.1. Supported Adapters
The following are the currently shipping Chelsio Adapters that are compatible with the Traffic
Management feature.
T420-CR
T420-CX
T440-CR
T404-BT
T422-CR
T440-LP-CR
T420-LL-CR
T420-BCH
T420-BT
1.2. Software Requirements
1.2.1. Linux Requirements
Currently the Traffic Management feature is available for the following versions:
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