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‘. For more information, see sensitivity.

Supported in the following platforms:

  • Access Points — AP505i, AP510i/e, AP560i/h
  • Service Platforms — NX5500, NX7500, NX9500, NX9600, VX9000

Syntax

interference-recovery {channel-hold-time|channel-switch-delta|client-threshold|
interference|neighbor-offset|noise|noise-factor}
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-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-test)#interference-recovery channel-switch-delta 2.4GHz 5
nx9500-6C8809(config-smart-rf-policy-test)#show con
smart-rf-policy test
 group-by floor
 sensitivity custom
 assignable-power 2.4GHz max 20
 assignable-power 2.4GHz min 8
 channel-list 2.4GHz 1,12
 channel-width 5GHz auto
 channel-width 2.4GHz auto
 area test channel-list 2.4GHz 1,2,3
 avoidance-time dfs 300
 interference-recovery channel-switch-delta 2.4GHz 5
 coverage-hole-recovery snr-threshold 2.4GHz 35
nx9500-6C8809(config-smart-rf-policy-test)#

Related Commands

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

Disables recovery from excessive noise and interference