Configures the RTS (Request to Send) threshold value on this radio

RTS is a transmitting station‘s signal that requests a CTS (Clear To Send) response from a receiving client. This RTS/CTS procedure clears the air where clients are contending for transmission time. Benefits include fewer data collisions and better communication with nodes that are hard to find (or hidden) because of other active nodes in the transmission path.

The RTS threshold controls RTS/CTS by initiating an RTS/CTS exchange for data frames larger than the threshold, and sends (without RTS/CTS) any data frames smaller than the threshold.

Consider the trade-offs when setting an appropriate RTS threshold for the WLAN‘s access point radios. A lower RTS threshold causes more frequent RTS/CTS exchanges. This consumes more bandwidth because of additional latency (RTS/CTS exchanges) before transmissions can commence. A disadvantage is the reduction in data-frame throughput. An advantage is quicker system recovery from electromagnetic interference and data collisions. Environments with more wireless traffic and contention for transmission make the best use of a lower RTS threshold.

A higher RTS threshold minimizes RTS/CTS exchanges, consuming less bandwidth for data transmissions. A disadvantage is less help to nodes that encounter interference and collisions. An advantage is faster data-frame throughput. Environments with less wireless traffic and contention for transmission make the best use of a higher RTS threshold.

Supported in the following platforms:

  • Access Points — AP505i, AP510i, AP510e, AP560i, AP560h


rts-threshold <0-65536>


rts-threshold <0-65536>
rts-threshold <0-65536> Specify the RTS threshold value from 0 - 65536 bytes. The default is 65536 bytes.


nx9500-6C8809(config-profile-510TestProfile-if-radio1)#rts-threshold 100

nx9500-6C8809(config-profile-510TestProfile-if-radio1)#show context
 interface radio1
  rf-mode sensor
  placement outdoor
  mesh client
  rts-threshold 100
  off-channel-scan channel-list 2.4GHz 1
  guard-interval long
  aggregation ampdu tx-only


Related Commands

no (radio-interface-config-command) Resets a radio‘s RTS threshold to its default