The whitelist session-car dhcpv6 command configures bandwidth parameters for CAR for whitelisted DHCPv6 sessions.
The undo whitelist session-car dhcpv6 command restores the default bandwidth parameter values for CAR for whitelisted DHCPv6 sessions.
The default CIR, CBS, PIR, and PBS of CAR for whitelisted DHCPv6 sessions are 256 kbit/s, 32000 bytes, 512 kbit/s, and 64000 bytes, respectively.
| Parameter | Description | Value |
|---|---|---|
| cir cir-value |
Specifies a committed information rate (CIR), that is, the average rate at which packets can be transmitted or forwarded. |
The value is an integer ranging from 0 to 1000000, in kbit/s. The default value is 256. |
| cbs cbs-value |
Specifies a committed burst size (CBS), that is, the committed burst traffic that can instantaneously pass through. |
The value is an integer ranging from 0 to 9000000, in bytes. The default value is 32000. |
| pir pir-value |
Specifies a peak information rate (PIR), that is, the highest rate at which packets can be transmitted or forwarded. |
The value is an integer ranging from 0 to 1000000, in kbit/s. The default value is 512. It is recommended that pir-value be greater than or equal to cir-value. |
| pbs pbs-value |
Specifies a peak burst size (PBS), that is, the peak burst traffic that can instantaneously pass through. |
The value is an integer ranging from 0 to 9000000, in bytes. The default value is 64000. It is recommended that pbs-value be greater than or equal to cbs-value. |
Usage Scenario
If a device receives a large number of DHCPv6 packets from different DHCPv6 servers, you can run the whitelist session-car dhcpv6 command to modify bandwidth parameters for the packets. This ensures that DHCPv6 packets can be sent to the CPU properly.
Precautions
In normal cases, adjusting this parameter is not recommended. Use the default value for this parameter instead.