Brocade Mobility 7131 Access Point Product Reference Guide (Supporting software release 4.4.0.0 and later) - Manual (Page 185)

Brocade Mobility 7131 Access Point Product Reference Guide 173
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5. Refer to the Beacon Settings field to set the radio beacon and DTIM intervals.
6. Refer to the Dynamic Chain Selection Settings field to enable or disable 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.
Set Aggregation Select the Enable Transmit A-MSDU checkbox (within the
A-MSDU Aggregation field) to enable the aggregation of MAC Service frames. When enabled,
long frames can be both sent and received (up to 4 KB). The A-MSDU buffer limit is not user
configurable. If disabled, no AMSDU packets are transmitted by the access point.
Select the
Enable Transmit A-MPDU checkbox (within the
A-MPDU Aggregation field) to allow the aggregation of MAC Protocol frames. When enabled,
long frames can be both sent and received (up to 64 KB). When enabled, define an A-MPDU
Transmit Size Limit (default is 2 bytes), A-MPDU Receive Size Limit (default is 65535 bytes)
and an A-MPDU Minimum Spacing Time (default is 0 usec). Set these values as appropriate to
broadcast the maximum length A-MPDU transmit and receive intervals that can be used.
Beacon Interval The beacon interval controls the performance of power save stations. A small interval may
make power save stations more responsive, but it will also cause them to consume more
battery power. A large interval makes power save stations less responsive, but could
increase power savings. The default is 100. Avoid changing this parameter as it can
adversely affect performance.
DTIM Interval The DTIM interval defines how often broadcast frames are delivered for each of the four
access point BSSIDs. If a system has an abundance of broadcast traffic and it needs to be
delivered quickly, Brocade Mobility recommends decreasing the DTIM interval for that
specific BSSID. However, decreasing the DTIM interval decreases the battery life on power
save stations. The default is 10 for each BSSID. Brocade Mobility recommends using the
default value unless qualified to understand the performance risks of changing it.