Qos Port Shaping; Figure 64 - Advanced - Qos - Network Traffic Class Settings - NetCommWireless NF18ACV User Manual

The above screen creates a traffic class rule to classify the upstream traffic, assign queuing priority and optionally overwrite
the IP header TOS (type of service) byte. A rule consists of a class name and at least one condition. All of the specified
conditions in this classification rule must be satisfied for the rule to take effect.
Click the Apply/Save button to save and activate the rule.

QoS Port Shaping

Port Shaping allows the limiting of continuous network speed without affecting burst traffic. For example, when your
browser loads a web page, this is a type burst traffic as the browser aims to fetch small amounts of data quickly and then
leaves the connection idle. Limiting port speed alone will affect the speed at which web pages are loaded, causing users to
feel that their overall internet connection speed is slow.
By configuring QoS Port Shaping with a Burst size, web pages are allowed to load using the burst speed, while continuous
traffic such as file downloads will be shaped at a lower rate.
To identify the best way to configure shaping rate and burst size, consider the equation below:
Time window = Burst size / rate
For example. if a 200 Mbps bandwidth limit is configured with a 5 ms burst window, the calculation becomes 200 Mbps x 5
ms = 125 Kbytes, which is approximately eighty-three (83) 1500-byte packets. If the 200 Mbps bandwidth limit is configured
on a Gigabit Ethernet interface, the burst duration is 125000 bytes / 1 Gbps = 1 ms at the Gigabit Ethernet line rate.
After 1ms of burst data at full gigabit speed, the speed is shaped to 200Mbps.
58 of 131
© NetComm Wireless 2017
Figure 64 – Advanced – QoS – Network Traffic Class settings
User Guide