interface serial 0/0/0 priority-group 1
While Packet Tracer does not support the full range of advanced QoS commands found on real IOS devices (like class-map , policy-map , or CBWFQ ), it does support the fundamental and Policing mechanisms essential for learning QoS concepts. cisco packet tracer qos
! On Router R1 (WAN edge) access-list 100 permit udp any any range 16384 32767 access-list 101 permit tcp any any eq 80 ! Priority Queuing priority-list 1 protocol ip high list 100 priority-list 1 protocol ip normal list 101 priority-list 1 default medium interface serial 0/0/0 priority-group 1 While Packet Tracer