SMC Networks SMC2552W-G2-17 manual Wmmparam, Syntax

7 Command Line Interface

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.

Example

Enterprise AP(if-wireless a)#wmm-acknowledge-policy 0 noack Enterprise AP(if-wireless a)#

wmmparam

This command configures detailed WMM parameters that apply to the access point (AP) or the wireless clients (BSS).

Syntax

wmmparam <AP BSS> <ac_number> <LogCwMin> <LogCwMax> <AIFS> <TxOpLimit> <admission_control>

•AP - Access Point

•BSS - Wireless client

•ac_number - 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 as shown in Table 6-1.(Range: 0-3)

•LogCwMin - Minimum log value of the contention window. This is the initial upper limit of the random backoff wait time before wireless medium access can be attempted. The initial wait time is a random value between zero and the LogCwMin value. Specify the LogCwMin value. Note that the LogCwMin value must be equal or less than the LogCwMax value.

(Range: 1-15 microseconds)

•LogCwMax - Maximum log value of the contention window. This is the maximum upper limit of the random backoff wait time before wireless medium access can be attempted. The contention window is doubled after each detected collision up to the LogCwMax value. Note that the CWMax value must be greater or equal to the LogCwMin value.

(Range: 1-15 microseconds)

•AIFS - Arbitrary InterFrame Space specifies the minimum amount of wait time before the next data transmission attempt.

(Range: 1-15 microseconds)

•TXOPLimit - Transmission Opportunity Limit specifies the maximum time an AC transmit queue has access to the wireless medium. When an AC queue is granted a transmit opportunity, it can transmit data for a time up to the TxOpLimit. This data bursting greatly improves the efficiency for high data-rate traffic. (Range: 0-65535 microseconds)

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