3com 4500 26-PORT User Manual

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C
HAPTER
 8: U
SING
 Q
O
S/ACL C
OMMANDS
link-group
 
acl-number
: Activates Layer 2 ACLs. acl-number: Sequence number 
of ACL, ranging from 4000 to 4999. 
rule
 
rule
: Specifies the subitem of an active ACL, ranging from 0 to 65534; if not 
specified, all subitems of the ACL will be activated. If only an IP ACL or a Layer 2 
ACL is activated, this parameter can be omitted. If both IP and Layer 2 ACLs are 
activated at the same time, the 
rule
 parameter cannot be omitted.
target-rate
: The set normal traffic, unit in Kbps, the granularity of traffic limit is 
64 kbps, if the number input is in ( N*64 <the number input<(N+1)*64), in which 
N is a natural number, the Switch automaticaly sets (N+1)*64 as the parameter 
value. For 100 Mbps ports, 
target-rate
 ranges from 64 to 99968 inclusive; for 
1000 Mbps ports, from 64 to 1000000 inclusive. 
exceed
 
action
:  The action taken when the traffic exceeds the threshold. The 
action
 can be:
drop
: Drops the packets.
remark-dscp value
: Sets new DSCP value.
Description
Use the 
traffic-limit 
command, to activate the ACL and perform traffic 
limitation. Use the 
undo traffic-limit 
command to remove traffic limitation.
This command performs traffic limitation on the packets that match with a 
specified ACL rule, and is only effective with a permit rule.
The granularity of traffic limit is 64 kbps.
You can only remark traffic with a DSCP value. The Switch 4500 does not permit 
CoS remarking with this command.
Example
Perform traffic limitation on packets that match the permit rule of ACL 2000. The 
target traffic rate is 128 kbps.
<4500>system-view
System View: return to User View with Ctrl+Z
[4500]interface Ethernet 1/0/1
[4500-Ethernet1/0/1] traffic-limit inbound ip-group 2000 128 
[4500-Ethernet1/0/1]
wred
Syntax
wred  queue-index qstart probability
undo wred queue-index
View
Ethernet Port View
Parameter
queue-index:
 index of output queue, in the range of 0~7.