Huawei Quidway S8500 Series Command Manual page 682

Command Manual – QoS/ACL
Quidway S8500 Series Routing Switches
in number (ranging 0 to 7) or name; cos-value is 802.1p priority, in number (ranging 0 to
7) or name; drop-level is drop level, in number (ranging 0 to 2) or name.
Note:
The mapping relationship between dscp-value and EXP is:
When the S8500 switch is used as the ingress PE device, for the IP packets, EXP is
matched according to the "DSCP+Conform-Level—service parameters" mapping
table; for TCP and UDP packets, the value of EXP is the lower 3 bits of dscp-value.
When the S8500 switch is used as the ingress P, the value of EXP is the lower 3 bits
of the dscp-value.
slot slotid: Slot number of a service processor card.
Description
Use the traffic-priority command to activate an ACL and choose a set of service
parameters for the matched traffic (only available to permitted ACL rules).
Use the undo traffic-priority command to remove service parameter setting.
The system can set service parameters for the matched traffic in one of following
modes:
1) Employ the service parameters automatically allocated by the switch. Upon
receiving a packet, the switch allocates a set of service parameters for it according
to a specific rule. To choose this mode, you should select the auto keyword in this
command.
Choose service parameters from the "DSCP + Conform-Level — >
2)
Service-parameter" mapping table according to packet DSCP value and conform
level. To choose this mode, you should select the remark-policed-service
trust-dscp keyword in this command.
Choose service parameters from the " DSCP + Conform-Level — >
3)
Service-parameter " mapping table or " EXP + Conform-Level — >
Service-parameter " mapping table according to user's DSCP priority or EXP
value of MPLS packets and packet conform level. To choose this mode, you
should select the remark-policed-service dscp dscp-value parameter in this
command.
4) Customize a set of service parameters. To choose this mode, you should select
the remark-policed-service untrusted dscp dscp-value cos cos-value
local-precedence local-precedence drop-priority drop-level parameter in this
command.
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2-39
Chapter 2 QoS Commands