Priority Commands (Layer 3 and 4) 55

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.

Table 55-6 Mapping IP DSCP to CoS Values

IP DSCP Value

CoS Value

 

 

0

0

 

 

8

1

 

 

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

 

 

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.

DSCP priority values are mapped to default Class of Service values according to recommendations in the IEEE 802.1p standard, and then subsequently mapped to the eight hardware priority queues.

This command sets the IP DSCP priority for all interfaces.

Example

The following example shows how to map IP DSCP value 1 to CoS value 0:

Console(config)#interface ethernet 1/5

Console(config-if)#map ip dscp 1 cos 0

Console(config-if)#

show map ip port

This command shows the IP port priority map.

Syntax

show map ip port [interface]

interface

ethernet unit/port

-unit - Stack unit. (Range: Always 1)

-port - Port number. (Range: 1-24/48)

port-channel channel-id(Range: 1-24)

55-11

Page 495
Image 495
Accton Technology ES4548D, ES4524D manual Mapping IP Dscp to CoS Values IP Dscp Value, Syntax Show map ip port interface