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Lantronix
SM24TBT2DPA and SM24TBT2DPB Web User Guide
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 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 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 frames. Support includes a super priority queue with
dedicated memory and strict highest priority in 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
This page lets you configure basic QoS Ingress Classification settings for all switch ports. To configure
QoS Port Classification parameters in the web UI:
1. Click Configuration, QoS, Port Classification.
2. Scroll to select QoS class, DP Level, PCP and DEI parameters.
3. Click the Apply button to save the setting.
4. To cancel the settings click the Reset button. The page will revert to previously saved values.
Figure 2-19.1: QoS Ingress Port Classification page
Parameter descriptions:
Port:
The port number for which the configuration below applies.