3Com S7906E - Switch, Руководство по настройке

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4-5
Figure 4-4 Line rate implementation
In the token bucket approach to traffic control, bursty traffic can be transmitted so long as enough
tokens are available in the token bucket; if tokens are inadequate, packets cannot be transmitted until
the required number of tokens are generated in the token bucket. Thus, traffic rate is restricted to the
rate for generating tokens, thus limiting traffic rate and allowing bursty traffic.
Line rate can only limit the total traffic rate on a physical port, while traffic policing can limit the rate of a
flow on a port. To limit the rate of all the packets on a port, using line rate is easier.
Configuring Traffic Policing
Configuration Procedure
Follow these steps to configure traffic policing:
To do… Use the command… Remarks
Enter system view system-view —
Create a class and enter
class view traffic classifier tcl-name [ operator
{ and | or } ]
—
Configure the match
criteria
if-match match-criteria —
Exit class view quit —
Create a behavior and
enter behavior view
traffic behavior behavior-name —
Configure a traffic policing
action
car cir committed-information-rate
[ cbs committed-burst-size [ ebs
excess-burst-size ] ] [ pir
peak-information-rate ] [ green action ]
[ yellow action ] [ red action ]
Required
z
On SC, SA, and EA
LPUs, the granularity of
traffic policing is 64 kbps.
z
On SD and EB LPUs, the
granularity of traffic
policing is 8 kbps.
Exit behavior view quit —