37
Figure 11 Rate limit implementation
The token bucket mechanism limits traffic rate when accommodating bursts. It allows bursty traffic to
be transmitted if enough tokens are available. If tokens are scarce, packets cannot be transmitted
until efficient tokens are generated in the token bucket. It restricts the traffic rate to the rate for
generating tokens.
Rate limit controls the total rate of all packets on a physical interface. It is easier to use than traffic
policing in controlling the total traffic rate on a physical interface.
Configuring traffic policing
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Create a traffic class
and enter traffic class
view.
traffic classifier
classifier-name
[
operator
{
and
|
or
} ]
By default, no traffic class exists.
3. Configure match
criteria.
if-match
match-criteria
By default, no match criterion is
configured.
For more information about the
if-match
command, see ACL and
QoS Command Reference.
4. Return to system
view.
quit
N/A
5. Create a traffic
behavior and enter
traffic behavior view.
traffic behavior
behavior-name
By default, no traffic behavior exists.
6. Configure a traffic
policing action.
car cir
committed-information-rate
[
cbs
committed-burst-size [
ebs
excess-burst-size ] ] [
green
action |
red
action |
yellow
action ] *
[
hierarchy-car
hierarchy-car-name
[
mode
{
and
|
or
} ] ]
car cir
committed-information-rate
[
cbs
committed-burst-size ]
pir
peak-information-rate [
ebs
excess-burst-size ] [
green
action |
red
action |
yellow
action ] *
[
hierarchy-car
hierarchy-car-name
Use either of the commands.
By default, no traffic policing action is
configured.
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