Q Os - Black Box LPB2910A User Manual

2-­‐19 Q oS
The switch supports four QoS queues per port with strict or weighted fair queuing scheduling. It
supports Q oS C ontrol L ists ( QCL) f or a dvanced p rogrammable Q oS c lassification, b ased o n I EEE 8 02.1p,
Ethertype, V ID, I Pv4/IPv6, D SCP, a nd U DP/TCP p orts a nd r anges.
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 s pecific Q oS c lass.
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 c lass q ueues a re c ongested.
2-­‐19.1 P ort C lassification
The section allows you to configure the basic QoS Ingress Classification settings for all switch ports.
And t he s ettings r elate t o t he c urrently s elected s tack u nit, a s r eflected b y t he p age h eader.
Web I nterface
To c onfigure t he Q oS P ort C lassification p arameters i n t he w eb i nterface:
1. Click C onfiguration, Q oS, P ort C lassification.
2. Scroll t o s elect Q oS c lass, D P L evel, P CP a nd D EI p arameters.
3. Click S ave t o s ave t he s etting.
4. If y ou w ant t o c ancel t he s etting, t hen y ou n eed t o c lick t he R eset b utton.
It w ill r evert t o p reviously s aved v alues.
Figure 2 -­‐19.1: The Q oS C onfiguration
Parameter d escription:
Port:

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Publication date: Sept, 2015
Revision A1