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15 QoS
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15.1 Port
Classification
The switch support four QoS queues per port with strict or weighted fair queuing
scheduling. It supports QoS Control Lists (QCL) for advance programmable QoS
classification, based on IEEE 802.1p, Ethertype, VID, IPv4/IPv6 DSCP, and UDP/TCP
ports and ranges.
High flexibility in the classification of incoming frames to a QoS class. The QoS
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 to provide queuing, scheduling, and congestion
control guarantees to the frame, according to what was configured for that specific
QoS class.
The switch supports advanced memory control mechanisms to provide 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.
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 “Save” to save the setting.
4.
If you want to cancel the setting, click the reset button to revert back to
previously saved values.
Figure 3-15.1: The QoS Configuration
