Type of Service Values

Solaris Bandwidth Manager uses the TOS byte in the following ways:

• In filters, as a classification criterion

• In classes, where it defines how the TOS byte must be overwritten

Table 4-1 Type of Service Values and Their Meanings

1000	minimize delay
0100	maximize throughput
0010	maximize reliability
0001	minimize monetary cost
0000	normal service

The classification criterion in filters is defined by the tos_match and the tos_match_mask parameters. tos_match_mask is a bitmask that defines which bits of the TOS byte need to be checked. tos_match is the value to check.

For example, to filter all packets whose TOS field has the "minimize delay" bit set and the "minimize monetary cost" bit cleared (xxx 1xx0x): tos_match_mask must be set to 000 1001 0 (0x12), and tos_match must be set to 000 1000 0 (0x10).

In classes, the following parameters are used: tos_mark_mask and tos_mark. tos_mark_mask is a bitmask defining which bits to modify in the TOS byte, and tos_mark is the value to apply.