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DSCP value (decimal)
18
20
22
26
28
30
34
36
38
8
16
24
32
40
48
56
0
802.1p priority
802.1p priority lies in Layer 2 packet headers and applies to occasions where Layer 3 header
analysis is not needed and QoS must be assured at Layer 2.
Figure 439 An Ethernet frame with an 802.1Q tag header
As shown in
two bytes in length), whose value is 0x8100, and the tag control information (TCI, two bytes in
length).
Figure 440
header is called "802.1p priority," because its use is defined in IEEE 802.1p.
values for 802.1p priority.
Figure
439, the 4-byte 802.1Q tag header consists of the tag protocol identifier (TPID,
presents the format of the 802.1Q tag header. The priority in the 802.1Q tag
DSCP value (binary)
010010
010100
010110
011010
011100
011110
100010
100100
100110
001000
010000
011000
100000
101000
110000
111000
000000
402
Description
af21
af22
af23
af31
af32
af33
af41
af42
af43
cs1
cs2
cs3
cs4
cs5
cs6
cs7
be (default)
Table 143
presents the
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