Operation Manual

MP Access Point Commands

12 – 275

See Also

● set ap radio mode on page 12-253

● set ap radio radio-profile on page 12-254

● show ap config radio on page 12-328

● show radio-profile on page 12-354

set radio-profile preamble-length

Changes the preamble length for which an 802.11b/g MP radio advertises support. This command

does not apply to 802.11a.

Syntax

set radio-profile name preamble-length {long | short}

Defaults

The default is short.

Access

Enabled.

History

Usage

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 a client associated with an 802.11b/g radio uses long preambles for unicast traffic, the MP still

accepts frames with short preambles but does not transmit 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.

You must disable all radios that use a radio profile before you can change parameters in the

profile. Use the set radio-profile mode command

Examples

The following command configures 802.11b/g radios that use the radio profile rp_long to

advertise support for long preambles instead of short preambles:

MX# set radio-profile rp_long preamble-length long

success: change accepted.