Configuring Aggregation Car; Configuration Procedure; Configuration Example - H3C S5820X Series Configuration Manual

In a bandwidth oversubscription scenario, where the bandwidth of an uplink port is lower than the total
traffic rate of its downlink ports for example, you can use hierarchical CAR to limit the total rate of the
traffic from the downlink ports while allowing each downlink port to forward traffic at the maximum rate
when the other ports are idle. For example, use common CAR actions to limit the rate of Internet access
flow 1 and that of flow 2 to 128 kbps respectively, and use a hierarchical CAR action to limit their total
traffic rate to 192 kbps. Reference the hierarchical CAR action for both flow 1 and flow 2 in AND mode.
When flow 1 is not present, flow 2 is transmitted at the maximum rate, 128 kbps. When both flows are
present, the traffic rate of flow 2 may drop below this rate, because the total rate of the two flows cannot
exceed 192 kbps.

Configuring aggregation CAR

Configuration procedure

Follow these steps to configure aggregation CAR in policy approach:
To do...
Enter system view
Configure an aggregation
CAR action
Enter behavior view
Reference the aggregation
CAR in the traffic behavior
Display the traffic
behavior configuration
information
Display the configuration
and statistics for the
specified aggregation
CAR

Configuration example

# Create an aggregation CAR action named aggcar-1, and configure the following parameters for it:
CIR 256, CBS 2000, and dropping red packets. Reference aggregation CAR aggcar-1 in behavior be1.
<Sysname> system-view
[Sysname] qos car aggcar-1 aggregative cir 256 cbs 2000 red discard
[Sysname] traffic behavior be1
[Sysname-behavior-be1] car name aggcar-1
Use the command...
system-view
qos car car-name aggregative cir committed-information-rate
[ cbs committed-burst-size [ ebs excess-burst-size ] ] [ pir
peek-information-rate ] [ red action ]
traffic behavior behavior-name
car name car-name
display traffic behavior user-defined [ behavior-name ] [ |
{ begin | exclude | include } regular-expression ]
display qos car name [ car-name ] [ | { begin | exclude |
include } regular-expression ]
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Remarks
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Required
Required
Required
Optional
Available in any
view