Quality of Service
QoS Advanced Mode
365
Cisco Sx350, SG350X, SG350XG, Sx550X & SG550XG Series Managed Switches, Firmware Release 2.2.5.x
20
Notes:
•
Single policer and aggregation policer are available when the device is in Layer 2
mode.
•
An ACL can be configured to one or more class maps regardless of policies.
•
A class map can belong to only one policy.
•
When a class map using single policer is bound to multiple ports, each port has its own
instance of single policer; each applying the QoS on the class map (flow) at a port
independent of each other.
•
An aggregate policer applies the QoS to all its flow(s) in aggregation regardless of
policies and ports.
Advanced QoS settings consist of three parts:
•
Definitions of the rules to match. All frames matching a single group of rules are
considered to be a
flow
.
•
Definition of the actions to be applied to frames in each flow that match the rules.
•
Binding the combinations of rules and action to one or more interfaces.
Workflow to Configure Advanced QoS Mode
To configure Advanced QoS mode, perform the following:
1. Select Advanced mode for the system by using the QoS Properties page
.
Select the Trust
Mode using the Global Settings page. 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:
•
If internal DSCP values are different from those used on incoming packets, map the
external values to internal values by using the Out-of-Profile DSCP Mapping page. This
in turn opens the DSCP Remarking page.
2. Create ACLs, as described in Create ACL Workflow.
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.
