What is the length of the label field in the MPLS header?

ITExamAnswers Editorial Team Last Updated: Jun 29, 2026

IT Exam Items Repository › Category: CCNP ENARSI v9 › What is the length of the label field in the MPLS header?

What is the length of the label field in the MPLS header?

20 bits
32 bits
16 bits
64 bits

Explanation: While the total MPLS header (or shim header) is 32 bits long, the specific label value field within that header is 20 bits. This 20-bit value is the number assigned by the router to identify a specific prefix or Forwarding Equivalence Class (FEC).

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