ZyWALL / USG (ZLD) CLI Reference Guide 74
CHAPTER 10
Dynamic Channel Selection
This chapter shows you how to configure and use dynamic channel selection on the ZyWALL / USG.
10.1 DCS Overview
Dynamic Channel Selection (DCS) is a feature that allows an AP to automatically select the radio
channel upon which it broadcasts by passively listening to the area around it and determining what
channels are currently being broadcast on by other devices.
When numerous APs broadcast within a given area, they introduce the possibility of heightened
radio interference, especially if some or all of them are broadcasting on the same radio channel.
This can make accessing the network potentially rather difficult for the stations connected to them.
If the interference becomes too great, then the network administrator must open his AP
configuration options and manually change the channel to one that no other AP is using (or at least
a channel that has a lower level of interference) in order to give the connected stations a minimum
degree of channel interference.
10.2 DCS Commands
The following table identifies the values required for many of these commands. Other input values
are discussed with the corresponding commands.
The following table describes the commands available for dynamic channel selection. You must use
the
configure terminal command to enter the configuration mode before you can use these
commands.
Table 27 Input Values for DCS Commands
LABEL DESCRIPTION
interval Enters the dynamic channel selection interval time. The range is 10 ~ 1440
minutes.
Table 28 Command Summary: DCS
COMMAND DESCRIPTION
[no] dcs activate Starts dynamic channel selection. Use the no parameter to turn it
off.
dcs 2g-selected-channel 2.4g_channels Sets the channels that are available in the 2.4 GHz band when
you manually configure the channels an AP can use.
dcs 5g-selected-channel 5g_channels Sets the channels that are available in the 5 GHz band when you
manually configure the channels an AP can use.
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