Policing On Svis - Cisco Catalyst 3750-X Software Configuration Manual

Chapter 39 Configuring QoS
Figure 39-4
Check if the packet is in
profile by querying the policer.

Policing on SVIs

Before configuring a hierarchical policy map with individual policers on an SVI, you must enable
Note
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.
OL-21521-01
Policing and Marking Flowchart on Physical Ports
Start
Get the clasification
result for the packet.
Is a policer configured
for this packet?
Yes
Yes
Pass
through
Check out-of-profile action
configured for this policer.
Modify DSCP according to the
policed-DSCP map. Generate
Done
No
No
Drop
Mark
a new QoS label.
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
Understanding QoS
Drop packet.
39-11