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7000 Series L3 Managed Switch Reference Manual for Software v2.0
CLI Commands: Differentiated Services 9-9
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
<tosbits> set to 0 and <tosmask> set to 1F (hex).
Default none
Format config diffserv class match ipprecedence <classname>
<0-7> [exclude]
config diffserv class match iptos
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
<classname> is the name of an existing DiffServ class. The value of <tosbits> is a two-digit
hexadecimal number from 00 to ff. The value of
<tosmask> is a two-digit hexadecimal number
from 00 to ff. The optional
[exclude] 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
<tosmask> denotes the bit positions in <tosbits> 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
<tosbits> value of a0 (hex) and a <tosmask> 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.
Note: In essence, this 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.
Default none
Format config diffserv class match iptos <classname>
<tosbits> <tosmask> [exclude]