Protocol Priority; Priority Marking; Traffic Policing - H3C S3100-52P Operation Manual

Operation Manual – QoS-QoS Profile
H3C S3100-52P Ethernet Switch
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1.3.3 Protocol Priority

Protocol packets generated by a switch carry their own priority. You can set a new IP
precedence or DSCP precedence for the specific type of protocol packets to implement
QoS.

1.3.4 Priority Marking

The priority marking function is to reassign priority for the traffic matching an ACL
referenced for traffic classification.
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.
If local precedence marking is configured, the traffic will be assigned to the output
queue corresponding to the re-marked local precedence.
If IP precedence or DSCP marking is configured, the traffic will be marked with
new IP precedence or DSCP precedence.

1.3.5 Traffic Policing

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, traffic can be limited to get only its committed resources during a
time period to avoid network congestion caused by excessive bursts.
Traffic policing is a kind of traffic control policy used to limit the traffic and the resource
occupied by supervising the traffic. The regulation policy is implemented according to
the evaluation result on the premise of knowing whether the traffic exceeds the
specification when traffic policing is performed. Normally, token bucket is used for traffic
evaluation.
802.1p priority
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Chapter 1 QoS Configuration
Local precedence
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