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Working with the M111
Radio configuration
3-12
If both options are enabled at the same time, whichever option is triggered first takes
precedence.
SNR is expressed in decibels (dB). The higher the number the stronger the signal.
Note If 802.1X/ WPA/WPA2 is enabled, this can add an unpredictable delay based on network
topology. For example, if a RADIUS server is being used for authentication as opposed to
preshared keys.
Fast roaming threshold count
Sets the number of contiguous beacons that must be received satisfying the Fast roaming
threshold for the M111 to switch over to a new AP.
Minimum SNR threshold
Use this parameter to speed up roaming between two APs with the same SSID and operating
on different channels (frequencies)
When the value of SNR falls below the set threshold, the M111:
Disassociates from the current AP (it does not wait until the connection is lost).
Performs a wireless scan.
Selects a new AP with which to AP to connect.
SNR is expressed in decibels (dB). The higher the number the stronger the signal.
Signal to noise ration (SNR) Indicates the relative strength of radio signals versus radio
interference (noise) in the radio signal path. In most environments, SNR is a good indicator
for the quality of the radio link. A higher SNR value means a better quality radio link.
Scan channel delay
(Only applies when connecting using a station profile for which active scanning is disabled.)
Sets the length of time in milliseconds that the M111 will scan a channel. By default, this is set
to 200 milliseconds which allows enough time for a probe/request/response exchange.
Fast scan channel delay
(Only applies when connecting using an active station profile)
Sets the length of time (in milliseconds) that the M111 will scan a channel. By default, this is
set to 30 milliseconds which is much less than the standard beacon interval of 100
milliseconds used by most APs.
Roaming persistence
Sets the amount of time (in milliseconds) that the M111 waits before it uses any of the
following roaming features: fast roaming threshold, fast roaming delta threshold, or minimum
SNR threshold.