Appendix B Introduction To Packet Precedences; Ip Precedence And Dscp Values - HP 5830 Series Configuration Manual

Input priority value
32 to 39
40 to 47
48 to 55
56 to 63

Appendix B Introduction to packet precedences

This section describes packet precedences.

IP precedence and DSCP values

Figure 21 ToS and DS fields
As shown in
represent IP precedence from 0 to 7, and the Traffic Classes field in the IPv6 header contains 8 bits,
where the first 3 bits (0 to 2) represent IP precedence from 0 to 7. According to RFC 2474, the ToS field
in the IPv4 header or the Traffic Classes field in the IPv6 header is redefined as the differentiated services
(DS) field, where a DSCP value is represented by the first 6 bits (0 to 5) and is in the range of 0 to 63.
The remaining 2 bits (6 and 7) are reserved.
Table 6 IP precedence
IP precedence (decimal)
0
1
2
3
4
5
6
7
Figure 21, the ToS field in the IPv4 header contains 8 bits, where the first 3 bits (0 to 2)
dscp-dp mapping
0
0
0
0
IP precedence (binary)
000
001
010
011
100
101
110
111
63
dscp-dot1p mapping
4
5
6
7
Description
Routine
priority
immediate
flash
flash-override
critical
internet
network