Cisco Systems 3750E manual Policing on SVIs, 36-10

Chapter 36 Configuring QoS

Understanding QoS

Figure 36-4 Policing and Marking Flowchart on Physical Ports

Start

Get the clasification result for the packet.

Is a policer configured					No
	for this packet?
		Yes
					No
Check if the packet is in
profile by querying the policer.
	Yes
		Pass
		through		Check out-of-profile action			Drop	Drop packet.
				configured for this policer.
						Mark
			Modify DSCP according to the
			policed-DSCP map. Generate
					a new QoS label.
		Done

Policing on SVIs

86835

Note Before configuring a hierarchical policy map with individual policers on an SVI, you must enable VLAN-based QoS on the physical ports that belong to the SVI. Though a policy map is attached to the SVI, the individual policers only affect traffic on the physical ports specified in the secondary interface level of the hierarchical policy map.

A hierarchical policy map has two levels. The first level, the VLAN level, specifies the actions to be taken against a traffic flow on an SVI. The second level, the interface level, specifies the actions to be taken against the traffic on the physical ports that belong to the SVI and are specified in the interface-level policy map.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
36-10	OL-9775-02