Chapter 8 Hardware Acceleration : Hardware acceleration overview : Network processors (NP1, NP2, NP3, NP4 and NP6) : NP processors and traffic logging and monitoring
  
NP processors and traffic logging and monitoring
Except for the NP6, network processors do not count offloaded packets, and offloaded packets are not logged by traffic logging and are not included in traffic statistics and traffic log reports.
NP6 processors support per-session traffic and byte counters, Ethernet MIB matching, and reporting through messages resulting in traffic statistics and traffic log reporting.