Maximum port utilization information.
Octets 1 - 7: information for last cycle
Octets 8 - 14: information for last minute
Octets 15 - 21: information for last hour
Within each group:
first octet = slot
second octet = interface
third octet = percentage utlilization
fourth through seventh octets = timestamp
Timestamp value = octet 4 * 256**3 +
octet 5 * 256**2 +
octet 6 * 256 +
octet 7.
Timestamp units are 1/100 second.