User Documentation

User Manual Managed Switches
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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