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| WMM Commands
C
30
HAPTER
wmm-acknowledge-
policy
wmmparam
This command allows the acknowledgement wait time to be enabled or
disabled for each Access Category (AC).
S
YNTAX
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.
D
EFAULT
ack
C
M
OMMAND
ODE
Interface Configuration (Wireless)
C
U
OMMAND
SAGE
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 6-1). 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.
E
XAMPLE
AP(if-wireless a)#wmm-acknowledge-policy 0 noack
AP(if-wireless a)#
This command configures detailed WMM parameters that apply to the
access point (AP) or the wireless clients (BSS).
S
YNTAX
wmmparam <AP | BSS> <ac_number> <LogCwMin> <LogCwMax>
<AIFS> <TxOpLimit> <admission_control>
AP - Access Point
BSS - Wireless client
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