Wireshark-dev: Re: [Wireshark-dev] Ethernet header below MPLS...
From: barcaroller <[email protected]>
Date: Fri, 23 Sep 2016 18:56:52 -0400
On 2016-09-16 01:03:06 +0000, Guy Harris said:

See

	https://tools.ietf.org/html/rfc4448

which is called "Encapsulation Methods for Transport of Ethernet over MPLS Networks".
Thanks for pointing me in the right direction, Guy!