R2511-HP MSR Router Series WLAN Command Reference(V5)

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Examples
# Set the max-rx-duration as 5000 milliseconds.
<Sysname> system-view
[Sysname] interface WLAN-Radio 2/0
[Sysname-WLAN-Radio2/0] max-rx-duration 5000
preamble
Use preamble to specify the type of preamble an AP can support.
Syntax
preamble { long | short }
undo preamble
Default
The short preamble is supported.
Views
WLAN radio interface view
Default command level
2: System level
Parameters
long: Indicates that only frames with a long preamble can be transmitted.
short: Indicates that frames with either a short preamble or a long preamble can be transmitted.
Usage guidelines
Preamble is a pattern of bits at the beginning of a frame so that the receiver can sync up and be ready
for the real data. There are two different kinds of preambles, short and long.
802.11a and 802.11an do not support this configuration.
Examples
# Configure the AP to support long preamble.
<Sysname> system-view
[Sysname] interface WLAN-Radio 2/0
[Sysname-WLAN-Radio2/0] radio-type dot11b
[Sysname-WLAN-Radio2/0] preamble long
protection-mode
Use protection-mode to specify a collision avoidance mechanism.
Use undo protection-mode to restore the default.
Syntax
protection-mode { cts-to-self | rts-cts }
undo protection-mode
Default
The collision avoidance mechanism is CTS-to-Self.