Huawei Quidway S3900 Series User Manual

Operation Manual - QoS&QoS Profile
Quidway S3900 Series Ethernet Switches-Release 1510 Chapter 1 QoS Configuration
Huawei Technologies Proprietary
1-11
Packets sent via this interface
queue1 weight1
queue2 weight2
Classify
Packets sent
queueN-1 weightN-1
queueN weightN
Sending queue
……
Dequeue
Packets sent via this interface
queue1 weight1
queue2 weight2
Classify
Packets sent
queueN-
1 weightN
-
1
queueN weightN
Sending queue
……
Dequeue
Packets sent via this interface
queue1 weight1
queue2 weight2
Classify
Packets sent
queueN-1 weightN-1
queueN weightN
Sending queue
……
Dequeue
Packets sent via this interface
queue1 weight1
queue2 weight2
Classify
Packets sent
queueN-
1 weightN
-
1
queueN weightN
Sending queue
……
Dequeue
Figure 1-7 Diagram for WRR
4) WRR queue-scheduling algorithm schedules all the queues in turn and every
queue can be assured of a certain service time. Assume there are 8 priority
queues on the port. WRR configures a weight value for each queue, which are
w7, w6, w5, w4, w3, w2, w1, and w0. The weight value indicates the proportion
of obtaining resources. On a 100M port, configure the weight value of WRR
queue-scheduling algorithm to 50, 50, 30, 30, 10, 10, 10 and 10 (corresponding
to w7, w6, w5, w4, w3, w2, w1, and w0 in order). In this way, the queue with the
lowest priority can get 5Mbps bandwidth at least, and the disadvantage of SP
queue-scheduling that the packets in queues with lower priority may not get
service for a long time is avoided. Another advantage of WRR queue is that:
though the queues are scheduled in order, the service time for each queue is not
fixed, that is to say, if a queue is empty, the next queue will be scheduled. In this
way, the bandwidth resources are made full use of.
1.1.12 Traffic-based Traffic Statistics
The function of traffic-based traffic statistics is to use ACL rules in traffic identifying and
perform traffic statistics on the packets matching with the ACL rules. You can get the
statistics of the packets you are interested in through this function.
1.2 QoS Supported by S3900
Table 1-4 QoS functions supported by S3900 and related commands
QoS Specification Related command
Priority
mapping
Support only the mapping
between 802.1p priority and
local queues
qos
cos-local-precedence-map

Huawei Quidway S3900 Series Specifications

General

Brand	Huawei
Model	Quidway S3900 Series
Category	Switch
Language	English