Cisco 350 Series Administration Manual page 653

Quality of Service
QoS Advanced Mode
STEP 1
STEP 2
STEP 3
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4
3. If ACLs defined, create class maps and associate the ACLs with them by using the Class
Mapping page.
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.
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).
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