H3C Technologies H3C S6300 Series Switches - Manual (Page 92)

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DSCP value (decimal) DSCP value (binary) Description
28 011100 af32
30 011110 af33
34 100010 af41
36 100100 af42
38 100110 af43
8 001000 cs1
16 010000 cs2
24 011000 cs3
32 100000 cs4
40 101000 cs5
48 110000 cs6
56 111000 cs7
0 000000 be (default)
802.1p priority
802.1p priority lies in the Layer 2 header and applies to occasions where Layer 3 header analysis is not
needed and QoS must be assured at Layer 2.
Figure 24 An Ethernet frame with an 802.1Q tag header
As shown in Figure 24 , the 4-byte 802.1Q tag header consists of the 2-byte tag protocol identifier (TPID)
and 2-byte tag control information (TCI). The value of the TPID is 0x8100. Figure 25 shows the format of
the 802.1Q tag header. The Priority field in the 802.1Q tag header is called the "802.1p priority",
because its use is defined in IEEE 802.1p.
Table 11 shows the values for 802.1p priority.
Figure 25 802.1Q tag header