John,
No.. there is not a logging facility on XOS that will give you the historical port counts. The best that can be done is to use Netsight or similar collector to collect RMON or specific SNMP port counters. If you use the command "show port utilization" and let it refresh that will give you historical for as long as you keep the screen up, otherwise you are best served with some type of SNMP collector.
Bill
