HP ProCurve 7102dl Reference Manual page 1407

SROS Command Line Interface Reference Guide Quality of Service (QoS) Map Commands
set precedence <0-7>
The set precedence command is an optional command for a QoS map that can be used to modify the IP
Precedence value (on matching packets) to the specified value. For more details on determining the IP
Precedence value, refer to the Technology Review section of the match command on page 1395. Use the no
form of this command to remove a specified precedence.
Syntax Description
<0-7> Specifies the decimal IP precedence value.
Default Values
No default value is necessary for this command.
Functional Notes
QoS policies are configured in the SROS CLI to dictate the priority for servicing specified traffic types on a
particular interface. QoS policies contain at least one match reference (using the match command) and
one or more action items (using the priority, bandwidth, or set commands).
The set precedence command can be used to change the Differentiated Services (DS) Field for incoming
traffic serviced by the QoS policy. Every IPv4 header contains an 8-bit Type of Service (ToS) field used for
marking data types requiring special handling when traveling through the network. Originally this ToS field
was used for IP Precedence markings (using only the first 3 bits of the 8-bit field), and was later revised in
RFC 2474 to create the 6-bit DS field (reserving the last two bits of the field for future use). The IP
Precedence value can be manipulated to indicate higher or lower traffic priority using decimal values
between 0 and 7.
Usage Examples
This command sets the IP Precedence value (for all matching traffic) to 5:
ProCurve(config)#qos map VOICEMAP 10
ProCurve(config-qos-map)#set precedence 5
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