beautypg.com

Enabling traffic shaping based on link status, Configuring the rate algorithm, Enabling channel sharing adjustment – H3C Technologies H3C WX3000E Series Wireless Switches User Manual

Page 212

background image

200

Enabling traffic shaping based on link status

Clients near an AP have high RSSI while clients at the border of the coverage area of the AP have low
RSSI. When the network is busy, the weak clients occupy the working channel of the AP for a long time

due to their lower speeds and affect the clients with good RSSI.
The traffic shaping feature identifies the weak clients by checking their signal strength and packet loss

ratio, and dynamically controls their packet throughput to reduce their impact to other clients.
To enable traffic shaping:

Step Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Enable traffic shaping based

on link status.

wlan option traffic-shaping enable Disabled by default.

Configuring the rate algorithm

802.11 protocols each support a set of rates. For example, 802.11g supports the rates of 1, 2, 5.5, 11, 6,

9, 12, 18, 24, 36, 48, and 54. An 802.11 protocol dynamic selects a proper rate based on the channel

quality and history data.
A rate algorithm applied on a radio can avoid improper rate adjustments that can impact network

operation. The system supports multiple rate algorithms, including ARR, HDD, HDD2, and LPL. The

default rate algorithm ARR is applicable in various scenarios.

NOTE:

You can configure the rate algorithm only on 802.11a/b/g radios.

To configure the rate algorithm:

Step Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Configure the rate algorithm.

wlan option rate-algorithm { arr
band | hdd | hdd2 | lpl

packet-count up-threshold
down-threshold }

ARR by default.

Enabling channel sharing adjustment

The non-overlapping channels of an 802.11 protocol are very limited. For example, 802.11g has only

three non-overlapping channels. Therefore, an AP can easily detect other APs working on the same
channel, especially in a high-density WLAN. Channel overlapping causes collisions and interference

and reduces WLAN performance. Proper channel planning and power control policies during WLAN

deployment are the major methods to reduce overlapping. In addition, you can perform this task in a live

network to reduce the impact of overlapping.