Command Manual - QoS/ACL
Quidway S3500 Series Ethernet Switches Chapter 2 QoS Commands
Huawei Technologies Proprietary
2-63
remark-drop-priority: Sets drop precedence based on conform-level.
remark-policed-service: Sets service groups based on conform-level and DSCP
priority.
exceed: Chooses action for over-threshold traffic, optional parameter.
z forward: Forwards packets.
z drop: Drops packets.
Description
Using the traffic-limit command, you can enable the ACL, initiate traffic limit and
specify different actions for in-threshold and over-threshold packets. Using the undo
traffic-limit command, you can remove traffic limit setting.
This configuration is only available to the permitted rules.
When setting the parameters of traffic policing, the following rule is recommended:
cir<pir, cbs=ebs=(cir/8)*(1~1.5). For example, if cir is set 1000Kbps, cbs=ebs
=(1000/8)*(1~1.5)= (125~180)Kbytes=(125000~180000)bytes. Note that, the
parameter unit of cbs and ebs is byte.
Note:
If you choose untrusted mode for a specific traffic in traffic-priority operation, that is,
you manually specify a service group for the designated traffic, then the traffic-limit
and traffic-statistic operations are invalid for this traffic. If you choose traffic-limit and
traffic-statistic, however, then the untrusted mode is invalid.
To the same data traffic, you cannot set both remark-cos and remark-policed-service
or both remark-drop-priority and remark-policed-service.
If you want to initiate remark-policed-service or remark-cos action, you must ensure
you have configured “DSCP+Conform-Level → Service group” mapping table or
“TC+Conform-Level → 802.1p priority” mapping table. For more information about
these two mapping tables, see the qos conform-level, dscp and local-precedence
commands.
Example
# Initiate traffic limit on the packets match the permitted rules in ACL 4000, the detailed
setting: CIR is 200 kbps; CBS is 25000 bytes; EBS is 25000bytes; drop the
over-threshold packets.
[Quidway-Ethernet0/1] traffic-limit inbound link-group 4000 200 25000 25000
conform remark-policed-service exceed-action drop
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