Configuring Ip Precedence Marking - Cisco Nexus 7000 Series Configuration Manual

Configuring IP Precedence Marking

Configuring IP Precedence Marking
You can set the value of the IP precedence field in bits 0–2 of the IPv4 type of service (ToS) field of the IP
header.
Note
The device rewrites the last 3 bits of the ToS field to 0 for packets that match this class.
The table below shows the precedence values.
Table 17: Precedence Values
Value
0-7
critical
flash
flash-override
immediate
internet
network
priority
routine
Procedure
Step 1
Step 2
Step 3
Cisco Nexus 7000 Series NX-OS Quality of Service Configuration Guide
50
Command or Action
switch# configure terminal
switch(config)# policy-map [type qos]
[match-first] {qos-policy-map-name |
qos-dynamic}
switch(config-pmap-qos)# class [type qos]
{class-map-name | qos-dynamic |
class-default} [insert-before
before-class-map-name]
List of Precedence Values
IP precedence value
Critical precedence (5)
Flash precedence (3)
Flash override precedence (4)
Immediate precedence (2)
Internetwork control precedence (6)
Network control precedence (7)
Priority precedence (1)
Routine precedence (0)
Purpose
Enters global configuration mode.
Creates or accesses the policy map named
qos-policy-map-name, and then enters
policy-map mode. The policy-map name can
contain alphabetic, hyphen, or underscore
characters, is case sensitive, and can be up to
40 characters.
Creates a reference to class-map-name, and
enters policy-map class configuration mode.
The class is added to the end of the policy map
unless insert-before is used to specify the class
to insert before. Use the class-default keyword
to select all traffic that is not currently matched
by classes in the policy map.
Configuring Marking