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Setting the Peak Burst for Two-Rate Rate-Limit Profiles
For two-rate rate-limit profiles only, you can use the peak-burst command to set
the peak burst in bytes for a rate-limit profile; range is 1–4294967295. Use to set
the peak burst in milliseconds for a rate-limit profile; range is 1–10000. The no
version restore the default value, 100 ms or 8192 bytes (whichever is more).
When you specify a nonzero value for the peak rate, the peak burst size is
automatically calculated for a 100-ms burst as described for the peak-rate command.
If the calculated peak burst size is less than the default value of 8192 bytes, the
default value 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.
Related Topics
Setting the Peak Rate for Rate-Limit Profiles
For two-rate rate-limit profiles only, you can use the peak-rate command to set the
peak rate in bits per second for a rate-limit profile; range is 1–4294967295. Use to
set the peak rate as a percentage value; range is 0–100. During a software upgrade,
the peak rate in a rate-limit profile is automatically set to 0 if it was nonzero but less
than the committed rate before the upgrade. The no version to restores the default
value, 0.
When you specify a nonzero value for the peak rate, the peak burst size is calculated
based on a 100-ms burst as follows:
The CLI displays peak rate in bits per second and peak 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:
mask-val
Issue the peak-burst command in Rate Limit Profile Configuration mode to set
the peak burst in bytes:
host1(config-rate-limit-profile)#peak-burst 96256
To set the peak burst in milliseconds:
host1(config-rate-limit-profile)#peak-burst millisecond 1000
peak-burst
peak burst in bytes = (peak rate in bps x 100 ms) ÷ 8 bits per byte
Chapter 5: Creating Rate-Limit Profiles
Setting the Peak Burst for Two-Rate Rate-Limit Profiles
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