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3Com Switch 7750 Series
Command Reference Guide – QoS Chapter 1 QoS Commands
1-27
z If the input index value is not 0 and does not conflict with the interior index used by
the system, the system will adopt the index value input by you;
z If the input index value is not 0 but conflicts with the interior index used by the
system, the system will reassign an index value.
When the specified ACL rule is not effective, the system will adopt the index value input
by you.
kbps: Specifies the limit rate to be measured in kbps. If the kbps keyword is specified,
the rate is measured in kbps, in the range of 64 to 1,024,000 with the granularity being
64. If the number you input is in the range of N*64 to (N+1)*64 (N is a natural number),
the switch will set the value to (N+1)*64 kbps automatically.
target-rate: Total rate to limit all the packets sent on a port. For type-A LPUs, the
target-rate argument is in the range of 64 to 8,388,608 in kbps with the granularity being
64. If the kbps keyword is not provided, the target-rate argument is in mbps in the range
of 1 to 1,000.
exceed action: Optional. The action is taken when the traffic exceeds the threshold.
Only type-A LPUs support this keyword. The action argument can be:
z drop: Drops the packets.
z remark-dscp value: Sets new DSCP value.
Description
Use the traffic-limit command to activate ACL for traffic identifying and perform traffic
policing.
Use the undo traffic-limit command to remove traffic policing.
The granularity of traffic limit is 64 kbps.
This command performs traffic limit on the packets matching the permit rule only.
Note:
Only the permit rule can be referenced in this command and applied to hardware.
Example
# Perform traffic limit on the packets matching the permit rule in ACL 2000 on
Ethernet1/0/1 of a type-A LPU. The maximum rate is 128 kbps.
<3Com> system-view
[3Com] interface Ethernet1/0/1