CONFIGURING THE SWITCH

CLI – The following example globally enables IP Precedence service on the switch.

Console(config)#map ip precedence

3-128

Console#

 

 

 

Mapping IP Precedence

The Type of Service (ToS) octet in the IPv4 header includes three precedence bits defining eight different priority levels ranging from highest priority for network control packets to lowest priority for routine traffic. The default IP Precedence values are mapped one-to-one to Class of Service values (i.e., Precedence value 0 maps to CoS value 0, and so forth). Bits 6 and 7 are used for network control, and the other bits for various application types. ToS bits are defined in the following table.

Priority Level

Traffic Type

7

Network Control

 

 

6

Internetwork Control

 

 

5

Critical

 

 

4

Flash Override

 

 

3

Flash

 

 

2

Immediate

 

 

1

Priority

 

 

0

Routine

 

 

Command Attributes

IP Precedence Priority Table – Shows the IP Precedence to CoS map.

Class of Service Value – Maps a CoS value to the selected IP Precendence value. Note that “0” represents low priority and “7” represent high priority.

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SMC Networks SMC6750L2 manual Mapping IP Precedence, Command Attributes