Cisco 3845 Software Guide - Page 509

Chapter 27 Configuring QoS Understanding QoS Figure 27-8 Input and Output Policy Relationship Traffic received on a port or service instance Classification In profile or out of profile Policing Mark Queueing and scheduling Inspect packet, and process the match commands. Compare received traffic rate with the configured policer and determine if the packet is in profile or out of profile. Based on whether the packet is in or out of profile and the configured parameters, determine whether to pass through, mark down, or drop the packet. Based on the hierarchical QoS configuration, create queues for classes, VLANs, and physical interfaces. Place the packet into the queue and service it according to the configuration. 208742 Table 27-1 Options for Input and Output Policies Action Input Policy Maps Classification Marking Policing Output Policy Maps Classification Queuing Feature Applicable Level Outer VLAN, Inner VLAN, or both VLAN level. Outer CoS, Inner CoS, or both, MAC ACLs, Class level. IP ACLs, IPv4 DSCP or Precedence, MPLS EXP Match any (only) Match any Physical level or VLAN level. Outer CoS, IPv4 DSCP or Precedence, MPLS Any one level (class, VLAN, or physical) EXP, QoS group or discard class Multiple marking actions for the same class 1 rate, 2 color Any one level (class, VLAN, or physical) 2 rate, 3 color Conditional marking: Outer CoS, IPv4 DSCP or Precedence, MPLS EXP, QoS group or discard class Multiple conditional marking actions. Outer VLAN, Inner VLAN, or both VLAN level Outer CoS, Inner CoS, or both, MAC ACLs, Class level IP ACLs, IPv4 DSCP or Precedence, MPLS EXP Match any (only) Tail drop (queue-limit) or weighted tail drop based on outer CoS, IPv4 DSCP or precedence, MPLS EXP, QoS group or discard class Class level OL-23400-01 Cisco ME 3800X and 3600X Switch Software Configuration Guide 27-21