Dell PowerConnect W-Airwave W-Airwave 7.2 Configuration Guide - Page 121

Table 53, Profile Settings

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Table 53 Profiles > SSID > HT SSID Profile Settings Field Default Description General Settings Folder Top Name Blank Other Settings High Throughput Enable Yes (SSID) 40 MHz Channel Usage Yes MPDU Aggregation Yes Max Transmitted AMPCU Size 65535 Max Received A-MPDU 65535 Size (bytes) Min MPDU Start 0 Spacing (uSec) Supported MCS Set 0-15 Short Guard Interval in Yes 40 MHz Mode Set the folder with which the profile is associated. The drop-down menu displays all folders available for association with the profile. Name of the HT SSID profile. Enable or disable high-throughput (802.11n) features on this SSID. This parameter is enabled by default. Enable or disable the use of 40 MHz channels. This parameter is enabled by default. Enable or disable MAC protocol data unit (MPDU) aggregation. High-throughput mesh APs are able to send aggregated MAC protocol data units (MDPUs), which allow an AP to receive a single block acknowledgment instead of multiple ACK signals. This option, which is enabled by default, reduces network traffic overhead by effectively eliminating the need to initiate a new transfer for every MPDU. Set the maximum size of a transmitted aggregate MPDU, in bytes. Range: 1576 -65535 Set the maximum size of a received aggregate MPDU, in bytes. Allowed values: 8191, 16383, 32767, 65535. Set the minimum time between the start of adjacent MPDUs within an aggregate MPDU, in microseconds. Allowed values: 0 (No restriction on MDPU start spacing), 0.25 uSec, 0.5 uSec, 1 uSec, 2 uSec, 4 uSec. Set a list of Modulation Coding Scheme (MCS) values or ranges of values to be supported on this SSID. The MCS you choose determines the channel width (20MHz vs. 40MHz) and the number of spatial streams used by the mesh node. The default value is 1-15; the complete set of supported values. To specify a smaller range of values, enter a hyphen between the lower and upper values. To specify a series of different values, separate each value with a comma. Examples:  2-10  1,3,6,9,12 Range: 0-15 Enable or disable use of short (400ns) guard interval in 40 MHz mode. A guard interval is a period of time between transmissions that allows reflections from the previous data transmission to settle before an AP transmits data again. An AP identifies any signal content received inside this interval as unwanted inter-symbol interference, and rejects that data. The 802.11n standard specifies two guard intervals: 400ns (short) and 800ns (long). Enabling a short guard interval can decrease network overhead by reducing unnecessary idle time on each AP. Some outdoor deployments, may, however require a longer guard interval. If the short guard interval does not allow enough time for reflections to settle in your mesh deployment, inter-symbol interference values may increase and degrade throughput. This parameter is enabled by default. Dell PowerConnect W AirWave 7.2 | Configuration Guide Dell PowerConnect W Configuration Reference | 121

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Dell PowerConnect W AirWave 7.2
| Configuration Guide
Dell PowerConnect W Configuration Reference
|
121
Table 53
Profiles > SSID > HT SSID
Profile Settings
Field
Default
Description
General Settings
Folder
Top
Set the folder with which the profile is associated. The drop-down menu displays all
folders available for association with the profile.
Name
Blank
Name of the HT SSID profile.
Other Settings
High Throughput Enable
(SSID)
Yes
Enable or disable high-throughput (802.11n) features on this SSID. This parameter is
enabled by default.
40 MHz Channel Usage
Yes
Enable or disable the use of 40 MHz channels. This parameter is enabled by default.
MPDU Aggregation
Yes
Enable or disable MAC protocol data unit (MPDU) aggregation.
High-throughput mesh APs are able to send aggregated MAC protocol data units
(MDPUs), which allow an AP to receive a single block acknowledgment instead of
multiple ACK signals. This option, which is enabled by default, reduces network traffic
overhead by effectively eliminating the need to initiate a new transfer for every MPDU.
Max Transmitted A-
MPCU Size
65535
Set the maximum size of a transmitted aggregate MPDU, in bytes.
Range: 1576 -65535
Max Received A-MPDU
Size
(bytes)
65535
Set the maximum size of a received aggregate MPDU, in bytes. Allowed values: 8191,
16383, 32767, 65535.
Min MPDU Start
Spacing
(uSec)
0
Set the minimum time between the start of adjacent MPDUs within an aggregate MPDU,
in microseconds.
Allowed values: 0 (No restriction on MDPU start spacing), 0.25 uSec, 0.5 uSec, 1 uSec, 2
uSec, 4 uSec.
Supported MCS Set
0-15
Set a list of Modulation Coding Scheme (MCS) values or ranges of values to be
supported on this SSID.
The MCS you choose determines the channel width (20MHz vs. 40MHz) and the number
of spatial streams used by the mesh node.
The default value is 1-15; the complete set of supported values. To specify a smaller
range of values, enter a hyphen between the lower and upper values. To specify a series
of different values, separate each value with a comma.
Examples:
2-10
1,3,6,9,12
Range: 0-15
Short Guard Interval in
40 MHz Mode
Yes
Enable or disable use of short (400ns) guard interval in 40 MHz mode.
A guard interval is a period of time between transmissions that allows reflections from
the previous data transmission to settle before an AP transmits data again. An AP
identifies any signal content received inside this interval as unwanted inter-symbol
interference, and rejects that data.
The 802.11n standard specifies two guard intervals: 400ns (short) and 800ns (long).
Enabling a short guard interval can decrease network overhead by reducing
unnecessary idle time on each AP. Some outdoor deployments, may, however require a
longer guard interval. If the short guard interval does not allow enough time for
reflections to settle in your mesh deployment, inter-symbol interference values may
increase and degrade throughput.
This parameter is enabled by default.