MPLS explicit NULL

An explicit NULL label in MPLS is used to indicate that the label stack must be popped, and the forwarding of the packet must then be based on the IPv4 header.

The explicit NULL label has a value of 0.

This is not to be confused with the implicit NULL label.

Links:

https://datatracker.ietf.org/doc/html/rfc3032#page-5

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