MPLS and DiffServUsing the EXP bits
Copy or map precedence into EXP field
Copy up the label stack
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
Label
EXP
S
TTL
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