Nortel Networks 2300 manual Set radio-profile name 11g-only enable disable

Configuring AP access points 271

that protection mode is less likely to be required. In this case, the 802.11b/g radios require a client to support all the 802.11g rates.

Note. Even when association of 802.11b clients is disabled, if an 802.11b/g radio detects a beacon from an 802.11b network, the radio enters protection mode to protect against interference.

To configure 802.11b/g radios to reject association attempts from 802.11b clients, use the following command:

set radio-profile name 11g-only {enable disable}

To configure the 802.11b/g radios in radio profile rp1 to allow associations from 802.11g clients only, type the following command:

23x0# set radio-profile rp1 11g-only enable

success: change accepted.

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 ports 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 adver- tisement 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:

23x0# set radio-profile rp_long preamble-length long

success: change accepted.

Nortel WLAN Security Switch 2300 Series Configuration Guide