D-Link DWS-1008 User Manual
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Changing the Preamble Length
By default, 802.11b/g radios advertise support for frames with short preambles and can support frames
with short or long preambles.
An 802.11b/g radio generates unicast frames to send to a client with the preamble length specified by
the client. An 802.11b/g radio always uses a long preamble in beacons, probe responses, and other
broadcast or multicast traffic.
Generally, clients assume access points require long preambles and request to use short preambles
only if the access point with which they are associated advertises support for short preambles. You can
disable the advertisement of support for short preambles by setting the preamble length value to long.
In this case, clients assume that the access point supports long preambles only and the clients request
long preambles.
Changing the preamble length value affects only the support advertised by the radio. Regardless of the
preamble length setting (short or long), an 802.11b/g radio accepts and can generate 802.11b/g frames
with either short or long preambles.
If any client associated with an 802.11b/g radio uses long preambles for unicast traffic, the AP access
point still accepts frames with short preambles but does not transmit any frames with short preambles.
This change also occurs if the access point overhears a beacon from an 802.11b/g radio on another
access point that indicates the radio has clients that require long preambles.
The default preamble length value is short. This command does not apply to 802.11a radios.
To change the preamble length advertised by 802.11b/g radios, use the following command:
set radio-profile
name
preamble-length {long | short}
To configure 802.11b/g radios that use the radio profile
rp_long
to advertise support for long preambles
instead of short preambles, type the following command:
DWS-1008#
set radio-profile rp_long preamble-length long
success: change accepted.
Resetting a Radio Profile Parameter to its Default Value
To reset a radio profile parameter to its default value, use the following command:
clear radio-profile
name parameter
Caution: Make sure you specify the radio profile parameter you want to reset. If you do not specify a
parameter, MSS deletes the entire profile from the configuration.
Summary of Contents for DWS-1008
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