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Quality of Service Commands
The commands described in this section are used to configure Differentiated
Services (DiffServ) classification criteria and service policies. You can classify traffic
based on access lists, IP Precedence or DSCP values, or VLANs. Using access lists
allows you select traffic based on Layer 2, Layer 3, or Layer 4 information contained
in each packet.
To create a service policy for a specific category of ingress traffic, follow these steps:
1.
Use the class-map command to designate a class name for a specific category
of traffic, and enter the Class Map configuration mode.
2.
Use the match command to select a specific type of traffic based on an access
list, an IPv4 DSCP value, IPv4 Precedence value, IPv6 DSCP value, a VLAN, or a
Table 111: Quality of Service Commands
Command Function Mode
class-map Creates a class map for a type of traffic GC
description Specifies the description of a class map CM
match Defines the criteria used to classify traffic CM
rename Redefines the name of a class map CM
policy-map Creates a policy map for multiple interfaces GC
description Specifies the description of a policy map PM
class Defines a traffic classification for the policy to act on PM
rename Redefines the name of a policy map PM
police rate Defines an enforcer for classified traffic based on the
metered flow rate
PM-C
set cos Services IP traffic by setting a class of service value for
matching packets for internal processing
PM-C
service-policy Applies a policy map defined by the policy-map command
to a particular interface
IC
show class-map Displays the QoS class maps which define matching criteria
used for classifying traffic
PE
show policy-map Displays the QoS policy maps which define classification
criteria for ingress or egress traffic, and may include policers
for bandwidth limitations
PE
show policy-map interface Displays the configuration of all classes configured for all
service policies on the specified interface
PE
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