D-Link DWL-8600AP User Manual page 614

D-Link UWS User Manual
Field
Rate Limiting
Rate Limit
Rate Limit Burst
Channel Bandwidth
Protection
Space Time Block Code Space Time Block Coding (STBC) is an 802.11n technique intended to improve the
No ACK
D-Link
Oct. 2015
Table 355: Radio Settings (Cont.)
Description
Enabling multicast and broadcast rate limiting can improve overall network
performance by limiting the number of packets transmitted across the network. This
feature is disabled by default.
Note: The available rate limit values are very low for most environments, so enabling
this feature is not recommended.
• To enable Multicast and Broadcast Rate Limiting, click Enabled.
• To disable Multicast and Broadcast Rate Disabled, click Disabled.
Enter the rate limit you want to set for multicast and broadcast traffic. The limit
should be greater than 1, but less than 50 packets per second. Any traffic that falls
below this rate limit will always conform to and be transmitted to the appropriate
destination.
The default and maximum rate limit setting is 50 packets per second. This field is
disabled if Rate Limiting is disabled.
Setting a rate limit burst determines how much traffic bursts can be before all traffic
exceeds the rate limit. This burst limit allows intermittent bursts of traffic on a
network above the set rate limit.
The default and maximum rate limit burst setting is 75 packets per second. This field
is disabled if Rate Limiting is disabled.
The 802.11n specification allows the use of a 40-MHz-wide channel in addition to the
legacy 20-MHz channel available with other modes. The 40-MHz channel enables
higher data rates but leaves fewer channels available for use by other 2.4 GHz and 5
GHz devices. The 40-MHz option is enabled by default for 802.11a/n modes and 20
MHz for 802.11b/g/n modes. You can use this setting to restrict the use of the
channel bandwidth to a 20-MHz channel.
The protection feature contains rules to guarantee that 802.11 transmissions do not
cause interference with legacy stations or applications. By default, these protection
mechanisms are enabled (Auto). With protection enabled, protection mechanisms
will be invoked if legacy devices are within range of the AP.
You can disable (Off) these protection mechanisms; however, when 802.11n
protection is off, legacy clients or APs within range can be affected by 802.11n
transmissions. 802.11 protection is also available when the mode is 802.11b/g.
When protection is enabled in this mode, it protects 802.11b clients and APs from
802.11g transmissions.
reliability of data transmissions. The data stream is transmitted on multiple antennas
so the receiving system has a better chance of detecting at least one of the data
streams.
Select one of the following options:
• Enable — The AP transmits the same data stream on multiple antennas at the
same time.
• Disable — The AP does not transmits the same data on multiple antennas.
Select Enable to specify that the AP should not acknowledge frames with QosNoAck
as the service class value.
Configuring Advanced Settings
Unified Wired and Wireless Access System
Page 614