MPLS Payload Protocol Identifier

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Last updated 2014-03-30 (latest revision 2013-09-26)
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The MPLS label stack has no explicit protocol identifier field to indicate the protocol type of the MPLS payload. This document proposes a mechanism for containing a protocol identifier field within the MPLS packet, which may be useful in some emerging use cases (e.g., network service chain and MPLS payload inspection).


Xiaohu Xu (
Mach Chen (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)