3Com 3CRWEASYA73 User Manual page 271

Default
supported
Command Mode
Interface Configuration (Wireless)
Example
Outdoor 11a Building to Building(if-wireless a)#wmm required
Outdoor 11a Building to Building(if-wireless a)#
wmm-acknowledge-policy
This command allows the acknowledgement wait time to be enabled or disabled
for each Access Category (AC).
Syntax
wmm-acknowledge-policy <ac_number> <ack | noack>
• ac_number - Access categories. (Range: 0-3)
• ack - Require the sender to wait for an acknowledgement from the
receiver.
• noack - Does not require the sender to wait for an acknowledgement
from the receiver.
Default
ack
Command Mode
Interface Configuration (Wireless)
Command Usage
• WMM defines four access categories (ACs) – voice, video, best effort, and
background. These categories correspond to traffic priority levels and are
mapped to IEEE 802.1D priority tags (see Table ). The direct mapping of
the four ACs to 802.1D priorities is specifically intended to facilitate
interpretability with other wired network QoS policies. While the four ACs
are specified for specific types of traffic, WMM allows the priority levels to
be configured to match any network-wide QoS policy. WMM also specifies
a protocol that access points can use to communicate the configured
traffic priority levels to QoS-enabled wireless clients.
• Although turning off the requirement for the sender to wait for an
acknowledgement can increases data throughput, it can also result in a
high number of errors when traffic levels are heavy.
6-159
Using the Command Line Interface