Chapter 43 Object
ZyWALL USG Series User’s Guide
816
2.4 GHz Channel
Selection Method
This field is available when you set
Channel Selection
to
DCS
.
Select
auto
to have the AP search for available channels automatically in the 2.4 GHz
band. The available channels vary depending on what you select in the
2.4 GHz Channel
Deployment
field.
Select
manual
and specify the channels the AP uses in the 2.4 GHz band.
Channel ID
This field is available only when you set
Channel Selection
to
DCS
and set
2.4 GHz Channel
Selection Method
to
manual
.
Select the check boxes of the channels that you want the AP to use.
2.4 GHz Channel
Deployment
This field is available only when you set
Channel Selection
to
DCS
and set
2.4 GHz Channel
Selection Method
to
auto
.
Select
Three-Channel Deployment
to limit channel switching to channels 1,6, and 11, the
three channels that are sufficiently attenuated to have almost no impact on one another.
In other words, this allows you to minimize channel interference by limiting channel-
hopping to these three “safe” channels.
Select
Four-Channel Deployment
to limit channel switching to four channels. Depending
on the country domain, if the only allowable channels are 1-11 then the Zyxel Device uses
channels 1, 4, 7, 11 in this configuration; otherwise, the Zyxel Device uses channels 1, 5, 9, 13
in this configuration. Four channel deployment expands your pool of possible channels
while keeping the channel interference to a minimum.
Enable 5 GHz DFS
Aware
This field is available only when you select
11a
,
11a/n
or
11ac
in the
802.11 Band
field.
Select this if your APs are operating in an area known to have RADAR devices. This allows
the device to downgrade its frequency to below 5 GHz in the event a RADAR signal is
detected, thus preventing it from interfering with that signal.
Enabling this forces the AP to select a non-DFS channel.
5 GHz Channel
Selection Method
This shows
auto
and allows the AP to search for available channels automatically in the 5
GHz band.
Advanced Settings
Country Code
Select the country code of APs that are connected to the Zyxel Device to be the same as
where the Zyxel Device is located/installed.
The available channels vary depending on the country you selected. Be sure to select the
correct/same country for both radios on an AP and all connected APs, in order to prevent
roaming failure and interference to other systems.
Guard Interval
This field is available only when the channel width is
20/40MHz
or
20/40/80MHz
.
Set the guard interval for this radio profile to either
Short
or
Long
.
The guard interval is the gap introduced between data transmission from users in order to
reduce interference. Reducing the interval increases data transfer rates but also increases
interference. Increasing the interval reduces data transfer rates but also reduces
interference.
Enable A-MPDU
Aggregation
Select this to enable A-MPDU aggregation.
Message Protocol Data Unit (MPDU) aggregation collects Ethernet frames along with their
802.11n headers and wraps them in a 802.11n MAC header. This method is useful for
increasing bandwidth throughput in environments that are prone to high error rates.
A-MPDU Limit
Enter the maximum frame size to be aggregated.
A-MPDU
Subframe
Enter the maximum number of frames to be aggregated each time.
Table 305 Configuration > Object > AP Profile > Add/Edit Radio Profile (continued)
LABEL
DESCRIPTION
Summary of Contents for USG110
Page 27: ...27 PART I User s Guide ...
Page 195: ...195 PART II Technical Reference ...
Page 309: ...Chapter 10 Interfaces ZyWALL USG Series User s Guide 309 ...
Page 313: ...Chapter 10 Interfaces ZyWALL USG Series User s Guide 313 ...
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