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classification looks for information up to Layer 4, including IPv4 and IPv6 DSCP, IPv4
TCP/UDP port numbers, and user priority of tagged frames. This QoS classification
mechanism is implemented in a QoS control list (QCL). The QoS class assigned to a
frame is used throughout the device for providing queuing, scheduling, and
congestion control guarantees to the frame according to what was configured for that
specific QoS class.
The switch support advanced memory control mechanisms providing excellent
performance of all QoS classes under any traffic scenario, including jumbo frame. A
super priority queue with dedicated memory and strict highest priority in the
arbitration. The ingress super priority queue allows traffic recognized as CPU traffic to
be received and queued for transmission to the CPU even when all the QoS class
queues are congested.
2-25.1 Port Classification
The section allows you to configure the basic QoS Ingress Classification settings for all
switch ports. and the settings relate to the currently selected stack unit, as reflected by
the page header.
Web Interface
To configure the QoS Port Classification parameters in the web interface:
1. Click Configuration, QoS, Port Classification
2. Scroll to select QoS class, DP Level, PCP and DEI parameters
3. Click the save to save the setting
4. If you want to cancel the setting then you need to click the Reset button.
It will revert to previously saved values
Figure 2-25.1: The QoS Configuration
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