This video offers a comprehensive look at Quality of Service configuration on Cisco Catalyst 3560 and 3750 Series switches. It’s a free training video that details the theory and configuration of quality of service (QoS) on Cisco Catalyst 3560 and 3750 Series switches (that switches used in the CCIE R/S and CCIE Voice labs respectively). Enjoy it:
Video: Cisco Catalyst 3560 and 3750 QoS Simplified
Quick Notes: Four main steps to configure QoS on Cisco Catalyst 3560-X and 3750-X series switches
1. 
Enable QoS
2. Configure Ingress QoS Model(s):
–Trust DSCP Model
–Conditional Trust Model
–Service Policy Models
3. Configure Ingress Queuing
4. Configure Egress Queuing
More Related from Cisco.com:
Medianet Campus Cisco Catalyst 3560-X/3750-X QoS Design At-a-Glance
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