Brocade Mobility RFS Controller CLI Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 1190)

1182 Brocade Mobility RFS Controller CLI Reference Guide
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Before defining rate limit thresholds for WLAN upstream and downstream traffic, Brocade
recommends you define the normal number of ARP, broadcast, multicast and unknown unicast
packets that typically transmit and receive from each supported WMM access category. If
thresholds are defined too low, normal network traffic (required by end-user devices) are dropped
resulting in intermittent outages and performance problems.
Connected wireless clients can also have QoS rate limit settings defined in both the upstream and
downstream direction.
Supported in the following platforms:
• Access Points — Brocade Mobility 650 Access Point, Brocade Mobility 6511 Access Point,
Brocade Mobility 1220 Access Point, Brocade Mobility 71XX Access Point, Brocade
Mobility 1240 Access Point
• Wireless Controllers — Brocade Mobility RFS4000, Brocade Mobility RFS6000, Brocade
Mobility RFS7000
• Service Platforms — Brocade Mobility RFS9510
Syntax:
rate-limit [client|wlan] [from-air|to-air]
{max-burst-size|rate|red-threshold}
rate-limit [client|wlan] [from-air|to-air] {max-burst-size <2-1024>|rate
<50-1000000>}
rate-limit [client|wlan] [from-air|to-air] {red-threshold [background <0-100>|
best-effort <0-100>|video <0-100>|voice <0-100>]}
Parameters
rate-limit [client|wlan] [from-air|to-air] {max-burst-size <2-1024>|rate
<50-1000000>}
rate-limit Configures traffic rate limit parameters
client Configures traffic rate limiting parameters on a per-client basis
wlan Configures traffic rate limiting parameters on a per-WLAN basis
from-air Configures traffic rate limiting from a wireless client to the network
to-air Configures the traffic rate limit from the network to a wireless client
max-burst-size
<2-1024> Optional. Sets the maximum burst size from 2 - 1024 kbytes. The chances of the upstream or
downstream packet transmission getting congested for the WLAN’s client destination are reduced for
smaller burst sizes. The default is 320 kbytes.
NOTE: Smaller the burst, lesser are the chances of upstream packet transmission resulting in congestion
for the WLAN’s 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 10% margin
(minimally) to allow for traffic bursts at the site.
rate <50-1000000> Optional. Sets the traffic rate from 50 - 1000000 kbps. This limit is the threshold value for the maximum
number of packets received or transmitted over the WLAN from all access categories. Any traffic that
exceeds the specified rate is dropped and a log message is generated. The default is 5000 kbps.