match ip tos

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 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 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). Use the [not] option to negate the match condition.

Note

The IP DSCP, IP Precedence, and IP ToS 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

This “free form” version of the IP DSCP/Precedence/TOS match specification gives the user complete control when specifying which bits of the IP Service Type field are checked.