Operation Manual – QoS-QoS Profile
H3C S3100 Series Ethernet Switches Chapter 1 QoS Configuration
1-10
Table 1-8 IP-precedence-to-local-precedence mapping table
IP precedence Local precedence
0 1
1 0
2 0
3 1
4 2
5 2
6 3
7 3
 Note:
The configuration of trusting the IP precedence of received packets and the
IP-precedence-to-local-precedence mapping tables are not available on S3100-EI
series Ethernet switches.
1.3.3 Priority Marking
The priority marking function is to reassign priority for the traffic matching an ACL
referenced for traffic classification.
z If 802.1p priority marking is configured, the traffic will be mapped to the local
precedence corresponding to the re-marked 802.1p priority and assigned to the
output queue corresponding to the local precedence.
z If local precedence marking is configured, the traffic will be assigned to the output
queue corresponding to the re-marked local precedence.
z If IP precedence or DSCP marking is configured, the traffic will be marked with
new IP precedence or DSCP precedence.
1.3.4 Traffic Policing and Traffic Shaping
The network will be made more congested by plenty of continuous burst packets if the
traffic of each user is not limited. The traffic of each user must be limited in order to
make better use of the limited network resources and provide better service for more
users. For example, a traffic flow can be limited to get only its committed resources
during a time period to avoid network congestion caused by excessive bursts.
Traffic policing and traffic shaping is each a kind of traffic control policy used to limit the
traffic and the resource occupied by supervising the traffic. The regulation policy is
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