Configure IP telephony (on Cat 3560)
how to configure voice(ip phone) and data(pc) on a single switch port enable QoS SW1(config)#mls qos conf it to be access mode even tho we sending traffic from two different vlan SW1(config)#interface gigabitEthernet 0/27 SW1(config-if)#switchport mode access this is where we identified or separate those two different traffic, data and and voice SW1(config-if)#switchport access vlan 100 SW1(config-if)#switchport voice vlan 200 by default Cisco IP phone marking the voice frame using Cos and mark it as value 5 and mark all frame from the PC as 0 let say we want to priorities frame from this PC(maybe this pc belong to manager) instruct the switch to trust the CoS marking SW1(config-if)#mls qos trust cos this command to conf the switch to only trust marking from ip phone SW1(config-if)#mls qos trust device cisco-phone one might ask how switch know it is connected to phone? answer is.. CDP SW1(config-if)#do sh cdp ne Capability Codes...