Useful command to debug ip tos precedence packets

Yet another note for myself:

R1#sh run int s1/0
Building configuration...

Current configuration : 244 bytes
!
interface Serial1/0
 ip address 172.16.13.1 255.255.255.0
 ip accounting precedence input

...

R1#sh interfaces s1/0 precedence
Serial1/0
  Input
    Precedence 0:  408 packets, 42172 bytes
    Precedence 3:  2812 packets, 180528 bytes
    Precedence 4:  2819 packets, 180976 bytes
    Precedence 6:  613 packets, 41872 bytes