4 Fast Ethernet Switch Management Guide

Priority Commands

4-215

Command Usage

• The precedence for priority mapping is IP Port, IP Precedence or IP DSCP,

and default switchport priority.

• IP Precedence and IP DSCP cannot both be enabled. Enabling one of these

priority types will automatically disable the other type.

Example

The following example shows how to enable IP DSCP mapping globally:

map ip dscp (Interface Configuration)

This command sets IP DSCP priority (i.e., Differentiated Services Code Point

priority). Use the no form to restore the default table.

Syntax

map ip dscp dscp-value cos cos-value

no map ip dscp

• dscp-value - 8-bit DSCP value. (Range: 0-63)

• cos-value - Class-of-Service value (Range: 0-7)

Default Setting

The DSCP default values are defined in the following table. Note that all the

DSCP values that are not specified are mapped to CoS value 0.

Command Mode

Interface Configuration (Ethernet, Port Channel)

Command Usage

• The precedence for priority mapping is IP Port, IP Precedence or IP DSCP,

and default switchport priority.

Console(config)#map ip dscp

Console(config)#

Table 4-71 Mapping IP DSCP to CoS Values

IP DSCP Value CoS Value

10, 12, 14, 16 2

18, 20, 22, 24 3

26, 28, 30, 32, 34, 36 4

38, 40, 42 5

48 6

46, 56 7