8-12
Classifier-Based Software Configuration      
Traffic Classes
Valid values are the numeric value or corresponding 
name of the DTR bit set. Some useful values are as 
follows: 
0normal
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, type ?.
Notes: 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 state-
ment. You can enter a match/ignore statement either 
with or without a tos-value.
Figure 8-2 shows the DTR bit set in a ToS/Traffic 
Class byte in an IPv4/IPv6 packet header and the 
difference between the DSCP, DTR, and precedence 
bits. 
[ 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.