Brocade Communications Systems Mobility 7131 Series Service Manual download pdf (Page 17)

Brocade Mobility 7131 Access Point Product Reference Guide 5

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Dynamic Chain Selection

When enabled, dynamic chain selection forces an access point radio to transmit packets using

legacy transmit rates (11b, 11g and/or 11a rates) using a single transmit chain. Transmissions

utilizing 11n rates (MCS0 - MCS15) continue to use a normal number of transmit chains, which

may be 1, 2, or 3 depending on the configuration and power source. If dynamic chain selection is

disabled, all transmissions utilize the same number of transmit chains. This feature is disabled by

default.

Brocade has determined some of our 802.11a/jointfilesconvert/389239/bg-based phones don't receive frames transmitted

by the a Mobility 7131 series access point very well if all 3 transmit chains are used. When only a

single transmit chain is used, communication between the access point and the phones works

better. This Brocade phone issue could also exist with other 802.11 legacy devices.

For information on enabling dynamic chain selection using the access point Web applet, see

Configuring the 802.11a/n or 802.11b/g/n Radio on page 5-167.

For information on using the CLI to set the access point’s dynamic chain selection configuration,

see br7131>admin(network.wireless.radio.802-11n[2.4 GHz])>set for the access point’s 2.4 GHz

radio and br7131>admin(network.wireless.radio.802-11n[5.0 GHz])>set for the access point 5

GHz radio.

Broadcast/Multicast Transmit Rate Control

Beginning with this release, professional installers now have the ability to define the access point’s

broadcast/multicast transmission configuration. Traditionally, the access point used the lowest

basic rate for broadcast/multicast transmissions, which was ideal from a range perspective (and

remains the default configuration).

The new enhancement provides an option to increase performance by transmitting

broadcast/multicast group packets at a higher rate (based on the radio’s defined basic data rates).

This option is optimal in environments where the access point’s broadcast/multicast (group

packet) transmission range is secondary to performance. Broadcast/multicast rate control is

configurable from the access point’s GUI applet, CLI and SNMP interfaces.

For information on configuring broadcast/multicast transmit rate control, see Configuring the

802.11a/n or 802.11b/g/n Radio on page 5-167.

Dedicated Sensor Support

Beginning with this release, the access point supports a CLI command enabling an access point

radio to convert to sensor only support. When enabled, only sensor mode radio configurations are

permitted. Radio configurations supporting data (WLAN) support are not configurable using the

access point’s GUI, CLI or SNMP interfaces.

LED Disable

Through extensive field research, Brocade has learned that not all customers wish to deploy an

access point with blinking LEDs. Health care deployments in particular have requested an option to

disable blinking LEDs. With this most recent release of the Mobility 7131N Access Point firmware,

an option has been added to the access point’s GUI applet and CLI to disable blinking LEDs. The

LEDs display and blink default until the disable option is invoked.

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Brocade Communications Systems Mobility 7131 Series Service Manual Page 17