The 7210 SAS devices maintain counters for queues within the system for the purpose of granular billing and accounting.
Each queue maintains the following counters:
counters for packets and octets accepted/forwarded into the queue
counters for packets and octets rejected at the queue
The counters available vary among the 7210 SAS platforms. Not all the counters are supported on all the platforms. Additionally there are restrictions on the number of counters that can be used simultaneously with a single queue. Some platforms can only count octets or packets and others can count both packets and octets. See ‟Accounting Records” in the 7210 SAS-D, Dxp, K 2F1C2T, K 2F6C4T, K 3SFP+ 8C System Management Guide for information about counter (and corresponding accounting record) support available on each of the platforms.