Redirect - H3C S7500 Series Operation Manual

Operation Manual – QoS
H3C S7500 Series Ethernet Switches
CIR
CBS
Peak information rate (PIR)
Excess burst size (EBS)
Two token buckets are used in this evaluation. The rates of putting tokens into the two
buckets are CIR and PIR respectively, and the sizes of two buckets are CBS and EBS
respectively (the two buckets are called C bucket and E bucket respectively for short),
representing different permitted burst levels. In each evaluation, you can adopt different
traffic control policies in different conditions, including "enough tokens in C bucket",
"insufficient tokens in C bucket but enough tokens in E bucket" and "insufficient tokens
in both C bucket and E bucket".
II. TP
A typical TP application is to supervise the specification of a traffic into the network and
limit the specification within a reasonable range, or to punish the extra traffic. Therefore,
the network resources and the interests of the operators are protected. For example,
you can limit HTTP packets within 50% of the network bandwidth. If the traffic of a
certain connection is excess, TP can choose to drop the packets or to reset the priority
of the packets.
TP is widely used for policing the traffic into the network of internet service providers
(ISP).TP can classify the policed traffic and perform pre-defined policing actions
according to different evaluation results. These actions include:
Forward: Forward the packet whose evaluation result is "conforming" or mark
DSCP precedence for packets in the Diff-Serv network and then forward them.
Drop: Drop the packet whose evaluation result is "nonconforming".
Remark the precedence and then forward: Remark the priority of the packet
whose evaluation result is "partly-conforming" and then forward it.
Perform the next-level policing: TP can be performed level by level and in each
level more detailed objects are policed.

1.1.9 Redirect

You can re-specify the forwarding port of a packet as required by your own QoS policy.
1.1.10 Queue Scheduling
When congestion occurs in the network, the problem that many packets compete for
resources must be solved, usually in the way of queue scheduling.
In the following section, strict priority (SP) queues and weighted round robin (WRR)
queues are introduced.
1) SP queue
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Chapter 1 QoS Configuration