interference-recovery

Enables interference recovery from neighboring radios and other sources of WiFi and non-WiFi interference when excess noise and interference is detected within the Smart RF supported radio coverage area. Smart RF provides mitigation from interference sources by monitoring the noise levels and other RF parameters on an access point radio's current channel. When a noise threshold is exceeded, Smart RF can select an alternative channel with less interference. To avoid channel flapping, a hold timer is defined which disables interference avoidance for a specific period of time upon detection. Interference recovery is enabled by default.

Note

Note

The interference-recovery parameters can be modified only if the sensitivity level is set to ‘custom‘. By default 'sensitivity' is set to 'medium'. However, if you change the interference-recovery settings, without changing the sensitivity level, the sensitivity setting automatically changes to 'custom'. For more information, see sensitivity.

Supported in the following platforms:

Syntax

interference-recovery {channel-blacklist-timeoutchannel-hold-time|channel-switch-delta|client-threshold|interference|neighbor-offset|noise|noise-factor}

interference-recovery channel-blacklist-timeout <10-3600>

interference-recovery {channel-switch-delta [2.4GHz|5GHZ] <5-35>}

interference-recovery {channel-hold-time <0-86400>|client-threshold <1-255>|interference|neighbor-offset <3-10>|noise|noise-factor <1.0-3.0>}

Parameters

interference-recovery channel-blacklist-timeout <10-3600>
channel-blacklist-timeout <10-3600> Optional. Modifies the time, in seconds, for which a channel remains blacklisted.
When a Smart RF monitored radio enters a 'continuous beacon stuck' state (i.e. the radio is stuck on a channel and stops beaconing), Smart RF blacklists the channel. By default, the channel remains blacklisted for 15 minutes (900 seconds). You can use 'channel-blacklist-timeout' parameter to change the default value.
  • <10-3600> - Specify a value from 10 - 3600 seconds. The default is 900 seconds.
 
interference-recovery {channel-switch-delta [2.4GHz|5GHZ] <5-35>}
channel-switch-delta Optional. Configures a threshold value for the difference between interference levels on the current channel and the prospective channel needed to trigger a channel change. If the difference in noise levels on the current channel and the prospective channel is below the configured threshold, the channel is not changed.
[2.4GHz|5GHz] Selects the band
  • 2.4GHz – Selects the 2.4 GHz band
  • 5GHz – Selects the 5.0 GHz band
<5-35> Specifies the threshold value for the difference between the current and prospective channel interference levels
  • <5-35> – Sets a value from 5 dBm - 35 dBm. The default setting is 20 dBm for both 2.4 GHz and 5.0 GHz bands.
 
interference-recovery {channel-hold-time <0-86400>|client-threshold <1-255>|
interference|neighbor-offset <3-10>|noise|noise-factor <1.0-3.0>}
channel-hold-time <0-86400> Optional. Defines the minimum time between two channel change recoveries
  • <0-86400> – Sets the time, in seconds, between channel change assignments based on interference or noise. The default is 1,800 seconds.
client-threshold <1-255> Optional. Specifies client thresholds needed to avoid channel change. If the specified threshold number of clients are connected to a radio, the radio avoids changing channels even if the Smart RF master determines that a channel change is required.
  • <1-255> – Sets the number of clients from 1 - 255. The default is 50.
interference Optional. Considers external interference values to perform interference recovery. This feature allows the Smart RF policy to scan for excess interference from supported radio devices. WLANs are susceptible to sources of interference, such as neighboring radios, cordless phones, microwave ovens and Bluetooth devices. When interference for WiFi sources is detected, Smart RF supported devices can change the channel and move to a cleaner channel. This feature is enabled by default.
neighbor-offset <3-10> Optional. Configures a noise factor value, which is taken into consideration when switching channels to avoid interference from neighboring access points. Smart RF enabled access points consider the difference in noise between candidate channels.
  • <3-10> – Specify a noise factor value from 3 - 10.
noise Optional. Considers noise values to perform interference recovery. This feature allows the Smart RF policy to scan for excess noise from WiFi devices. When detected, Smart RF supported devices can change their channel and move to a cleaner channel. This feature is enabled by default.
noise-factor <1.0-3.0> Optional. Configures additional noise factor (the level of network interference detected) for non WiFi interference
  • <1.0-3.0> – Specify the noise factor from 1.0 - 3.0. The default is 1.5.

Examples

nx9500-6C8809(config-smart-rf-policy-test6)#interference-recovery channel-blacklist-timeout 20

nx9500-6C8809(config-smart-rf-policy-test6)#interference-recovery channel-switch-delta 2.4GHz 10

nx9500-6C8809(config-smart-rf-policy-test6)#show context
smart-rf-policy test6
 sensitivity custom
 area test6 assignable-power 2.4GHz min 8
 area test6 assignable-power 2.4GHz max 16
 interference-recovery channel-switch-delta 2.4GHz 10
 no select-shutdown
 interference-recovery channel-blacklist-timeout 20
nx9500-6C8809(config-smart-rf-policy-test6)#

Related Commands

no (smart-rf-policy-config-mode-command)

Disables recovery from excessive noise and interference
9036514-01 Rev AA