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Parameter
cell-size-
reduction
<reduction>
csa-count
<count>
csd-override
disable-arm-
wids-
functions
dot11h
SCALANCE W1750D CLI
Function Manual, 03/2019, C79000-G8976-C452-04
Description
The cell size reduction feature allows you manage
dense deployments and to increase overall system
performance and capacity by shrinking an APs receive
coverage area. It helps to minimize co-channel inter-
ference and optimizes channel reuse. The possible
range of values for this feature are 0-55 dB.
NOTE: This value should be changed if the network is
experiencing performance issues. The default 0 dB
reduction allows the radio to retain its current default
Rx sensitivity value.
Values from 1 dB - 55 dB reduce the power level that
the radio can hear by that amount. If you configure this
feature to use a non-default value, you must also re-
duce the radio's Tx power to match its new Rx power
level.
Failure to match a device's Tx power level to its Rx
power level can result in a configuration that allows the
radio to send messages to a device that it cannot hear.
Configures the number of channels switching an-
nouncements that must be sent before switching to a
new channel.
This allows associated clients to recover gracefully
from a channel change.
Most transmissions to HT stations are sent through
multiple antennas using CSD. When you enable the
CSD Override parameter, CSD is disabled and only
one antenna transmits data, even if they are being sent
to high-throughput stations. This enables interoperabil-
ity for legacy or high-throughput stations that cannot
decode 802.11n CDD data. This option is disabled by
default, and should only be enabled underthe supervi-
sion of technical support. Use this feature to turn off
antenna diversity when the AP must support legacy
clients such as Cisco 7921g VoIP phones, or older
802.11g clients (e.g. Intel Centrino clients).
NOTE: Enabling this feature can reduce overall
throughput rates.
By default, WIDS protection is on dynamic mode. If an
AP is heavily loaded with client traffic and the CPU
utilization exceeds the threshold limit, the WIDS pro-
cessing is suspended. This causes more CPU cycles
tohandle the client traffic. When the CPU utilization is
within the the threshold limit, the WIDS processing is
resumed. When disable-arm-wids-functions is on, the
AP will always process frames for WIDS purposes
even when it is heavily loaded with client traffic. Whend
is able-arm-wids-functions is off, the AP will stopp
rocess frames for WIDS purposes regardless of
whether the AP is heavily loaded or not. The WIDS
functionality will not take effect.
Allows the AP to advertise its 802.11d (country infor-
mation) and 802.11h (transmit power control) capabili-
ties.
CLI Commands
4.15 R
Range
Default
1-55
0
0-10
2
—
—
Dynamic,
off
off, on
—
Disabled
229
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