Netgear gsm7312 사용자 설명서

ACL Commands

10-5

This command specifies an IP Precedence match condition for an ACL rule referenced by the 

and

The IP Precedence field in a packet is defined as the high-order three 

bits of the Service Type octet in the IP header. The 

parameter identifies the 

precedence value as an integer from 0 to 7. 

The commands to match IP DSCP, IP precedence, and IP TOS are alternative ways to specify a 
match criterion for the same Service Type field in the IP header, however each uses a different user 
notation. 

This command specifies a TOS field match condition for an ACL rule referenced by the 

and

The IP TOS field in a packet is defined as all eight bits of the Service Type octet 

in the IP header. The 

parameter is a two-digit hexadecimal number from 00 to ff. The 

parameter is a two-digit hexadecimal number from 00 to ff. 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).

In essence, this is the “free form” version of the IP DSCP/Precedence/TOS match specification in 
that the user has complete control of specifying which bits of the IP Service Type field are 
checked.

The commands to match IP DSCP, IP precedence, and IP TOS are alternative ways to specify a 
match criterion for the same Service Type field in the IP header, however each uses a different user 
notation. To specify a match on all Precedence values, set 

to 0 and set 

to 

1f (hex). To specify a match on all DSCP values, set 

to 0 and set 

to 03 

(hex).