Cisco 500 Series Administration Manual page 621

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STEP 1
STEP 2
STEP 3
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4. Create a policy using the Policy Table page, and associate the policy with one
or more class maps using the Policy Class Map page. You can also specify the
QoS, if needed, by assigning a policer to a class map when you associate the
class map to the policy.
• Single Policer—Create a policy that associates a class map with a single
policer by using the Policy Table page and the Class Mapping page. Within
the policy, define the single policer.
• Aggregate Policer—Create a QoS action for each flow that sends all
matching frames to the same policer (aggregate policer) by using the
Aggregate Policer page. Create a policy that associates a class map with the
aggregate policer by using the Policy Table page.
5. Bind the policy to an interface by using the Policy Binding page.
Configuring Global Settings
The Global Settings page contains information for enabling Trust on the device.
Packets entering a QoS domain are classified at the edge of the QoS domain.
To define the Trust configuration:
Click Quality of Service > QoS Advanced Mode > Global Settings.
Select the Trust Mode while the device is in Advanced mode. If a packet CoS
level and DSCP tag are mapped to separate queues, the Trust mode determines
the queue to which the packet is assigned:
• CoS/802.1p—Traffic is mapped to queues based on the VPT field in the
VLAN tag, or based on the per-port default CoS/802.1p value (if there is no
VLAN tag on the incoming packet), the actual mapping of the VPT to queue
can be configured in the mapping CoS/802.1p to Queue page.
• DSCP—All IP traffic is mapped to queues based on the DSCP field in the IP
header. The actual mapping of the DSCP to queue can be configured in the
DSCP to Queue page. If traffic is not IP traffic, it is mapped to the best effort
queue.
• CoS/802.1p-DSCP—Select to use Trust CoS mode for non-IP traffic and
Trust DSCP for IP traffic.
Select the default Advanced mode QoS trust mode (either trusted or untrusted) for
interfaces in the Default Mode Status field. This provides basic QoS functionality
on Advanced QoS, so that you can trust CoS/DSCP on Advanced QoS by default
(without having to create a policy).
Cisco 500 Series Stackable Managed Switch Administration Guide
Quality of Service
QoS Advanced Mode