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HP 6125G Configuration Manual: Appendix B Packet Precedences; Ip Precedence And Dscp Values

Hp 6125g & 6125g/xg blade switches acl and qos configuration guide-r2103.
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Appendix B Packet precedences

IP precedence and DSCP values

Figure 24 ToS and DS fields
As shown in
2) represent IP precedence from 0 to 7; the Traffic Classes field in the IPv6 header contains eight bits,
where the first three 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 six bits (0 to 5) and is in the range 0
to 63. The remaining two bits (6 and 7) are reserved.
Table 7 Description on IP precedence
IP precedence (decimal)
0
1
2
3
4
5
6
7
Table 8 Description on DSCP values
DSCP value (decimal)
46
10
12
14
18
Figure
24, the ToS field in the IPv4 header contains eight bits, where the first three bits (0 to
IP precedence (binary)
000
001
010
011
100
101
110
111
DSCP value (binary)
101110
001010
001100
001110
010010
71
Description
Routine
priority
immediate
flash
flash-override
critical
internet
network
Description
ef
af11
af12
af13
af21

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