H3C Technologies H3C S12500 Series Switches - Manual (Page 95)

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Figure 22 802.1Q tag header
Table 17 Description on 802.1p priority
802.1p priority (decimal) 802.1p priority (binary) Description
0 000 best-effort
1 001 background
2 010 spare
3 011 excellent-effort
4 100 controlled-load
5 101 video
6 110 voice
7 111 network-management
EXP values
The EXP field is in MPLS labels for MPLS QoS purposes.
Figure 23 MPLS label structure
As shown in Figure 23 , the EXP field is 3 bits long and is in the range of 0 to 7.