User Documentation

User Manual Managed Switches

2 x (Forwarding Delay – 1 sec) = 6 sec.

You can remedy the situation in many ways. One solution is simply to increase the Forwarding Delay

value to at least 11 sec.

Perform the following steps to avoid repetitive approach:

Step 1: Assign a value to “Hello Time” and then calculate the left most part of rule 4 to get the lower

limit of “Max. Age”.

Step 2: Assign a value to “Forwarding Delay” and then calculate the right most part of rule 4 to get

the upper limit for “Max. Age”.

Step 3: Assign a value to “Forwarding Delay” that satisfies the conditions.

3.6 Using Traffic Prioritization

The Weidmüller switch’s traffic prioritization capability provides Quality of Service (QoS) to your

network by making data delivery more reliable. You can prioritize traffic on your network to ensure

that high priority data is transmitted with minimum delay. Traffic can be controlled by a set of rules to

obtain the required Quality of Service for your network. The rules define different types of traffic and

specify how each type should be treated as it passes through the switch. The Weidmüller switch can

inspect both IEEE 802.1p/1Q layer 2 CoS tags, and even layer 3 TOS information to provide

consistent classification of the entire network. The implemented QoS capability improves the

performance and determinism of industrial networks for mission critical applications.

3.6.1 The Traffic Prioritization Concept

What is Traffic Prioritization?

Traffic prioritization allows you to prioritize data so that time-sensitive and system-critical data can be

transferred smoothly and with minimal delay over a network. The benefits of using traffic prioritization

are:

 Improve network performance by controlling a wide variety of traffic and managing

congestion.

 Assign priorities to different categories of traffic. For example, set higher priorities for

time-critical or business-critical applications.

 Provide predictable throughput for multimedia applications, such as video conferencing or

voice over IP, and minimize traffic delay and jitter.

 Improve network performance as the amount of traffic grows. This will save cost by reducing

the need to keep adding bandwidth to the network.

How Traffic Prioritization Works