Cisco Cisco IOS Software Release 12.2(33)SRE

This feature is not in compliance with RFC2330, because it does not account for inter-packet 
randomness.

To enable the IP SLAs random scheduler option, you should understand the following concept:

The IP SLAs random scheduler option is disabled by default. To enable the random scheduler option, 
you must set a frequency range when configuring the ip sla group schedule command in global 
configuration mode. The group of operations restarts at uniformly distributed random frequencies within 
the specified frequency range. The following guidelines apply for setting the frequency range:

The starting value of the frequency range should be greater than the timeout values of all the 
operations in the group operation.

The starting value of the frequency range should be greater than the schedule period (amount of time 
for which the group operation is scheduled). This guideline ensures that the same operation does not 
get scheduled more than once within the schedule period.

The following guidelines apply if the random scheduler option is enabled:

The individual operations in a group operation will be uniformly distributed to begin at random 
intervals over the schedule period.

The group of operations restarts at uniformly distributed random frequencies within the specified 
frequency range.

The minimum time interval between the start of each operation in a group operation is 
100 milliseconds (0.1 seconds). If the random scheduler option is disabled, the minimum time 
interval is 1 second.

Only one operation can be scheduled to begin at any given time. If the random scheduler option is 
disabled, multiple operations can begin at the same time.

The first operation will always begin at 0 milliseconds of the schedule period.

The order in which each operation in a group operation begins is random.

This section contains the following task: