Publication date: Sept, 2015
Revision A1
165
2-‐19 QoS
The switch supports four QoS queues per port with strict or weighted fair queuing scheduling. It
supports QoS Control Lists (QCL) for advanced programmable QoS classification, based on IEEE 802.1p,
Ethertype, VID, IPv4/IPv6, DSCP, and UDP/TCP ports and ranges.
Classifying incoming frames to a QoS class is highly flexible. 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 for providing 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, 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 is 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-‐19.1 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 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-‐19.1: The QoS Configuration
Parameter description:
Port:
Содержание LPB2910A
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