Operation Manual – QoS
H3C S3610&S5510 Series Ethernet Switches
Chapter 2 Traffic Classification, TP, and TS
Configuration
2-5
802.1p priority (decimal)
802.1p priority (binary)
Description
7 111
network-management
The precedence is called 802.1p priority because the related applications of this
precedence are defined in detail in the 802.1p specifications.
2.2 TP and TS Overview
If the traffic from users is not limited, a large amount of continuous burst packets will
result in worse network congestion. The traffic of users must be limited in order to make
better use of the limited network resources and provide better service for more users.
For example, if a traffic flow obtains only the resources committed to it within a certain
period of time, network congestion due to excessive burst traffic can be avoided.
TP and TS are traffic control policies for limiting traffic and resource usage by
supervising the traffic. The prerequisite for TP or TS is to determine whether or not the
traffic exceeds the set threshold. Traffic control policies are adopted only when the
traffic exceeds the set threshold. Generally, token bucket is used for evaluating traffic.
2.3 Traffic Evaluation and the Token Bucket
2.3.1 Token bucket
The token bucket can be considered as a container with a certain capacity to hold
tokens. The system puts tokens into the bucket at the set rate. When the token bucket
is full, the extra tokens will overflow and the number of tokens in the bucket stops
increasing.
Figure 2-4
Evaluate the traffic with the token bucket
