Operation Manual – QoS-QoS Profile
H3C S3100 Series Ethernet Switches Chapter 1 QoS Configuration
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Figure 1-6 Diagram for traffic shaping
For example, if the device A sends packets to the device B. The device B will perform
traffic policing on packets from the device A to drop the packets beyond the
specification.
In order to avoid meaningless packet loss, you can perform traffic shaping on the
packets on the egress of the device A and cache the packets beyond the traffic policing
specification in the device A. When the next packets can be sent, the packets cached in
the buffer queues will be taken out and sent. In this way, all the packets sent to the
device B conforms to the traffic specification of the device B.
1.3.5 Port Rate Limiting
Port rate limiting refers to limiting the total rate of inbound or outbound packets on a
port.
Port rate limiting can be implemented through token buckets. That is, if you perform
port rate limiting configuration for a port, the token bucket determines the way to
process the packets to be sent by this port or packets reaching the port. Packets can be
sent or received if there are enough tokens in the token bucket; otherwise, they will be
dropped.
Compared to traffic policing, port rate limiting applies to all the packets passing a port. It
is a simpler solution if you want to limit the rate of all the packets passing a port.
1.3.6 Traffic Redirecting
Traffic redirecting identifies traffic using ACLs and redirects the matched packets to
specific ports. By traffic redirecting, you can change the way in which a packet is
forwarded to achieve specific purposes.
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