This sets how many historical sample buckets, rolling data points, will be requested for future auto-created RMON Ethernet history entries. This value, combined with the sampling interval, determines how far back in time an auto-created history entry can be queried before the oldest samples roll off; an admin wanting to retain a full week of 30-minute samples needs to make sure this bucket count is large enough, 336 buckets for a week at 30-minute intervals, before new ports are activated. For example, with the interval at 1800 seconds and this set to 48, an auto-created history entry would only retain the most recent 24 hours of samples before the oldest ones are overwritten.