Nortel Networks 2300 manual Set radio-profile name max-rx-lifetime time

270Configuring AP access points

Changing the Maximum Receive Threshold

The maximum receive threshold specifies the number of milliseconds a frame received by a radio can remain in buffer memory. To change the maximum receive lifetime, use the following command:

set radio-profile name max-rx-lifetime time

The time can be from 500 ms (0.5 second) through 250,000 ms (250 seconds). The default is 2000 ms (2 seconds).

To change the maximum receive threshold for radio profile rp1 to 4000 ms, type the following command:

23x0# set radio-profile rp1 max-rx-lifetime 4000

success: change accepted.

Changing the Maximum Transmit Threshold

The maximum transmission threshold specifies the number of milliseconds a frame scheduled to be trans- mitted by a radio can remain in buffer memory. To change the maximum transmit lifetime, use the following command:

set radio-profile name max-tx-lifetime time

The time can be from 500 ms (0.5 second) through 250,000 ms (250 seconds). The default is 2000 ms (2 seconds).

To change the maximum transmit threshold for radio profile rp1 to 4000 ms, type the following command:

23x0# set radio-profile rp1 max-tx-lifetime 4000

success: change accepted.

Disabling 802.11b Client Associations on 802.11b/g Radios

By default, an 802.11b/g radio allows associations from 802.11b clients as well as 802.11g clients. The radio requires a client to support the 802.11b data rates but client support for the higher 802.11g rates is optional. This radio configuration allows both types of clients to associate with the radio and is useful in networks that have a mixture of both types of clients.

When 802.11b traffic is detected by an 802.11b/g radio, the radio enters protection mode. Protection mode guards against 802.11b interference with 802.11g traffic that is at data rates higher than the 802.11b rates. Because 802.11b clients cannot detect the traffic at data rates higher than are supported by 802.11b, the clients might cause interference by sending traffic while 802.11g access ports or clients also are sending traffic.

To guard against interference, an 802.11b/g radio in protection mode sends messages while 802.11g traffic at higher data rates is being sent, to inform 802.11b devices about the 802.11g traffic and reserve bandwidth for the traffic. Protection mode remains in effect until 60 seconds after the last 802.11b traffic is detected by the 802.11b/g radio.

Protection mode lowers overall traffic throughput due to the additional messages sent by 802.11b/g radios. You can configure the 802.11b/g radios in a radio profile to reject association attempts by 802.11b clients so

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