IP Accounting

IP Accounting is an IP service that permit to count the packet in our out an interfaces.
Let's see the differents ways of doing it :

Account for every packet :
ip accounting

Account for packets with an ip precedence set :
ip accounting precedence input
ip accounting precedence output

Account only for ouput packet
ip accounting output-packet

Account only for packets blocked by an access-list applied on the interface
ip accounting acess-violations

Verification
show ip accounting
show interface s1/0 precedence