Netgear gsm7312 사용자 설명서

Differentiated Services

9-9

This command adds to the specified class definition a match condition based on the value of the IP 
Precedence field in a packet, which is defined as the high-order three bits of the Service Type octet 
in the IP header (the low-order five bits are not checked). The 

 is the name of an 

existing DiffServ class. The precedence value is an integer from 0 to 7. The optional

 

parameter has the effect of negating this match condition for the class (i.e., match all IP 
Precedence values except for what is specified here).

Note: The ipdscp, ipprecedence, and iptos match conditions are alternative ways to specify a 
match criterion for the same Service Type field in the IP header, but with a slightly different user 
notation.

Note: To specify a match on all Precedence values, use the config diffserv class match iptos 
command with 

set to 0 and

 set to 1F (hex).

This command adds to the specified class definition a match condition based on the value of the IP 
TOS field in a packet, which is defined as all eight bits of the Service Type octet in the IP header. 
The 

 is the name of an existing DiffServ class. The value of 

 is a two-digit 

hexadecimal number from 00 to ff. The value of

 is a two-digit hexadecimal number 

from 00 to ff. The optional 

 parameter has the effect of negating this match condition 

for the class (i.e., match all IP Precedence values except for what is specified here).

The 

 denotes the bit positions in 

 that are used for comparison against the IP 

TOS field in a packet. For example, to check for an IP TOS value having bits 7 and 5 set and bit 1 
clear, where bit 7 is most significant, use a 

 value of a0 (hex) and a 

 of a2 

(hex).

Note: The ipdscp, ipprecedence, and iptos match conditions are alternative ways to specify a 
match criterion for the same Service Type field in the IP header, but with a slightly different user 
notation.