CONFIGURING THE SWITCH

CLI – The following example globally enables IP Precedence service on the switch, maps IP Precedence value 1 to CoS value 0 on port 5, and then displays all the IP Precedence settings for that port. (Note that the setting is global and applies to all ports on the switch.)

Console(config)#map

ip precedence

3-156

Console(config)#interface

ethernet 1/5

3-85

Console(config-if)#map ip

precedence 1 cos 0

3-157

Console(config-if)#end

 

 

 

Console#show map ip

precedence ethernet 1/5

3-160

Precedence

mapping status: disabled

 

Port

Precedence COS

 

 

---------

---------- ---

 

 

Eth 1/ 5

 

0

0

 

 

Eth 1/ 5

 

1

0

 

 

Eth 1/ 5

 

2

2

 

 

Eth 1/ 5

 

3

3

 

 

Eth 1/ 5

 

4

4

 

 

Eth 1/ 5

 

5

5

 

 

Eth 1/ 5

 

6

6

 

 

Eth 1/ 5

 

7

7

 

 

Console#

 

 

 

 

 

 

 

 

 

 

 

Mapping DSCP Priority

The DSCP is six bits wide, allowing coding for up to 64 different forwarding behaviors. The DSCP replaces the ToS bits, and it retains backward compatibility with the three precedence bits so that non-DSCP compliant, ToS-enabled devices, will not conflict with the DSCP mapping. Based on network policies, different kinds of traffic can be marked for different kinds of forwarding. 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.

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

 

 

2-86

Page 116
Image 116
SMC Networks TigerSwitch 100 manual Mapping Dscp Priority