H3C Technologies H3C MSR 50 - Manual (Page 283)

262
DSCP value (decimal) DSCP value (binary) Keyword
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 packet header and is applicable to occasions where Layer 3 header
analysis is not needed and QoS must be assured at Layer 2.
Figure 262 An Ethernet frame with an 802.1q tag header
As shown in Figure 262 , the 4-byte 802.1q tag header consists of the TPID (2 bytes in length), whose
value is 0x8100, and the TCI (2 bytes in length). Figure 263 shows the format of the 802.1q tag header.
The priority in the 802.1q tag header is called "802.1p priority," because its use is defined in IEEE
802.1p.
Figure 263 802.1q tag header
Table 123 describes available 802.1p priority values.