Release Notes
TOS priority settings for TosDSCP INI
Routers treat network packets dierently based on priority of the TOS tag in the IP header.
IP header has a 1-byte eld called TOS—Type of Service.
IP precedence is older than DSCP. DSCP is compatible with IP Precedence.
Table 38. TOS priority settings
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
IP
precedence
IP precedence
DSCP DSCP
Class Selector Drop Precedence
CS1 Dscp (001 000) match packets with precedence 1 (Low)
CS2 Dscp (010 000) match packets with precedence 2
CS3 Dscp (011 000) match packets with precedence 3
CS4 Dscp (100 000) match packets with precedence 4
CS5 Dscp (101 000) match packets with precedence 5
CS6 Dscp (110 000) match packets with precedence 6
CS7 Dscp (111 000) match packets with precedence 7 (High)
Table 39. TOS priority settings
IP precedence (3 bits) DSCP ( 6 bits)
Name Value bits Per-Hop
behavior
ClassSelector
DropPreceden
ce
Code point Name DSCP Bits(decimal)
Routine 0 0 Default NA NA Default 000 000 (0)
Priority 1 1 AF 1 1.Low AF11 001 010 (10)
2.Medium AF12 001 100 (12)
3.High AF13 001 110 (14)
Immediate 2 10 AF 2 1.Low AF21 010 010 (18)
2.Medium AF22 010 100 (20)
3.High AF23 010 110 (22)
Flash 3 11 AF 3 1.Low AF31 011 010 (26)
ThinOS 8.5_107 49