Advanced Traffic Management Guide K/KA/KB.15.15

Valid values for precedence-value are either the
numeric value (0 to 7) or corresponding name of an IP
precedence bit set:
0 routine
1 priority
2 immediate
3 flash
4 flash-override
5 critical
6 internet (for internetwork control)
7 network (for network control)
To display a list of valid precedence-value entries
when you enter precedence in a match/ignore
statement, enter ?.
NOTE: When used as a match criteria, the IP
precedence value is applied in addition to all other
criteria configured in the match/ignore statement. You
can enter a match/ignore statement either with or
without a precedence-value.
The IP precedence bits are the leftmost three bits of the
ToS/Traffic Class byte. The numeric value (0 to 7) of
the IP precedence bits corresponds to the hexadecimal
equivalent of the three binary 0 and 1 bits in the IP
precedence field. For example if the IP precedence-bit
binary values are 1 1 1, the numeric value is 7
(1+2+4). Similarly, if the IP precedence bits are 0 1
0, the numeric value is 2 (0+2+0).
tos tos-value (Optional) Matches the Delay Throughput Reliability
(DTR) bit set in the IPv4 Type-of-Service or IPv6 Traffic
Class byte to further define match criteria.
Valid values are the numeric value or corresponding
name of the DTR bit set. Some useful values are as
follows:
0 — normal
2 — max-reliability
4 — max-throughput
8 — minimize-delay
Default: 0 or normal.
To display a list of valid tos-value entries when you
enter tos in a match/ignore statement, enter ?.
NOTE: When used as a match criteria, the ToS/Traffic
Class byte entry is applied in addition to all other
criteria configured in the match/ignore statement. You
can enter a match/ignore statement either with or
without a tos-value.
vlan vlan-id(Optional) Matches the VLAN ID number in the Layer 2 header of 802.1Q VLAN
packets to further define match criteria. Valid VLAN IDs are from 1 to 4094.
“A ToS/traffic class field” (page 348) uses a sample ToS/Traffic Class field of
10101000 to show the differences between the IP precedence ( 101), DSCP (
346 Classifier-based software configuration