High Capacity Counters
What are High Capacity Counters?
Section titled “What are High Capacity Counters?”Since the advent of faster and faster network interfaces, SNMP’s original use of 32 bits for counters has become somewhat outdated. As a counter of network throughput in bytes, a 32bit counter can only count up to approximately 4GB before rolling back to zero. On a very fast interface, the counter may reset before it can be read again.
High Capacity Counters are designed to solve this issue by increasing counters from 32-bit (maximum of 4,294,967,295 bytes) to 64-bit (maximum of 9,223,372,036,854,775,807 bytes).
How does PeakHour use them?
Section titled “How does PeakHour use them?”If PeakHour detects that your router supports High Capacity (64-bit) counters, it will automatically use them to measure throughput. This will result in more accurate usage while your Mac is asleep or switched off.
PeakHour will indicate if it has detected 64-bit counters in the Bandwidth Monitor Summary section under Monitors > Target:
High Capacity Counters Detected?
Yes
No
For more information on High Capacity Counters, see the 2nd question of this FAQ:
http://www.cisco.com/en/US/tech/tk648/tk362/technologies_q_and_a_item09186a00800b69ac.shtml
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