Setting The Committed Burst For A Rate-Limit Profile - Juniper POLICY MANAGEMENT - CONFIGURATION GUIDE V11.1.X Configuration Manual

JUNOSe 11.1.x Policy Management Configuration Guide
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Setting the Committed Burst for a Rate-Limit Profile

You can use the committed-burst command to set the committed burst in bytes;
range is 1–4294967295. You can use the committed-burst command to set the
committed burst in milliseconds for a rate-limit profile; range is 1–10000. The no
version restores the default value, 8192 bytes if the rate is in bytes per second; 100
milliseconds if the rate is in milliseconds.
When you specify a nonzero value for the rate, the burst size is automatically
calculated for a 100-ms burst as described for the committed-rate command. If the
calculated burst size is less than the default value of 8 KB, the default value (8192
bytes) is used.
NOTE: We recommend that you do not configure a committed or peak burst size
smaller than the MTU of the interface. Doing so causes large packets to be dropped
even when they are transmitted at a very low rate.
When you specify a nonzero value for the committed rate, the committed burst size
is calculated based on a 100-ms burst as follows:
committed burst in bytes = (committed rate in bps x 100 ms) ÷ 8 bits per byte
The router displays committed rate in bits per second and committed burst in bytes.
For example, if the rate is 8 Mbps, the burst size is 100 ms x 8 Mbps = 800,000 bits
or 100,000 bytes:
committed burst = (8,000,000 bps x 100 ms) ÷ 8 = 100,000 bytes
For this example, displaying the rate-limit profile shows:
committed-rate 8000000
committed-burst 100000
If the calculated burst value is less than the default burst size of 8 KB, the default
burst size is used. For most configurations this value probably is sufficient, making
it optional for you to configure a value for the associated committed burst size.
To configure the committed burst, enter Rate Limit Profile Configuration mode.
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Setting the Committed Burst for a Rate-Limit Profile
host1(config-rate-limit-profile)#committed-action transmit
committed-action
Issue the committed-burst command:
host1(config-rate-limit-profile)#committed-burst 20000