Cisco Catalyst 4500 Series Command Reference Manual page 652

set cos
Command
set dscp
set precedence
show policy-map
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.3.0SG and IOS 15.1(1)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
Description
Marks a packet by setting the differentiated services code
point (DSCP) value in the type of service (ToS) byte.
Sets the precedence value in the packet header.
Displays information about the policy map.
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