Brocade Mobility RFS Controller System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 350)

338 Brocade Mobility RFS Controller System Reference Guide
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5. Set the following From Air Upstream Random Early Detection Threshold settings for each
access category. An early random drop is done when a traffic stream falls below the set
threshold.
6. Configure the following parameters in respect to the intended To Air Downstream Rate Limit, or
traffic from neighbors to associated Access Point radios and the controller or service platform:
Background Traffic Set a percentage value for background traffic in the transmit direction. This is a percentage of the
maximum burst size for low priority traffic. Background traffic exceeding the defined threshold is
dropped and a log message is generated. Background traffic consumes the least bandwidth of any
access category, so this value can be set to a lower value once a general transmit rate is known by
the network administrator (using a time trend analysis). The default threshold is 50%.
Best Effort Traffic Set a percentage value for best effort traffic in the transmit direction. This is a percentage of the
maximum burst size for normal priority traffic. Best effort traffic exceeding the defined threshold is
dropped and a log message is generated. Best effort traffic consumes little bandwidth, so this
value can be set to a lower value once a general transmit rate is known by the network
administrator (using a time trend analysis). The default threshold is 50%.
Video Traffic Set a percentage value for video traffic in the transmit direction. This is a percentage of the
maximum burst size for video traffic. Video traffic exceeding the defined threshold is dropped and a
log message is generated. Video traffic consumes significant bandwidth, so this value can be set to
a higher value once a general transmit rate is known by the network administrator (using a time
trend analysis). The default threshold is 25%.
Voice Traffic Set a percentage value for voice traffic in the transmit direction. This is a percentage of the
maximum burst size for voice traffic. Voice traffic exceeding the defined threshold is dropped and a
log message is generated. Voice applications consume significant bandwidth, so this value can be
set to a higher value once a general upstream rate is known by the network administrator (using a
time trend analysis). The default threshold is 0%.
Mesh Rx Rate Limit Select the check box to enable rate limiting for all data transmitted by the device to any mesh point
in the mesh. This feature is disabled by default.
Rate Define an transmit rate limit between 50 - 1,000,000 kbps. This limit constitutes a threshold for
the maximum the number of packets transmitted or received over the mesh point (from all access
categories). Traffic that exceeds the defined rate is dropped and a log message is generated. The
default setting is 5000 kbps.
Maximum Burst Size Set a maximum burst size between 2 - 1024 kbytes. The smaller the burst, the less likely the
receive packet transmission will result in congestion for the mesh points wireless client
destinations. By trending the typical number of ARP, broadcast, multicast and unknown unicast
packets over a period of time, the average rate for each access category can be obtained. Once a
baseline is obtained, administrators should then add a minimum of a 10% margin to allow for
traffic bursts at the site. The default burst size is 320 kbytes.