Cisco Catalyst 3550 Command Reference Manual page 202

mls qos monitor
Related Commands Command
show mls qos interface
Catalyst 3550 Multilayer Switch Command Reference
2-176
Description
Displays all the DSCPs for which statistics are maintained and the
corresponding ingress and egress statistics, including the number of
bytes dropped, when the statistics keyword is appended.
Chapter 2 Cisco IOS Commands
78-11195-09