Ethernet and Overlay technologies over Ethernet Frames Formats

Tuesday, December 31, 2013

Ethernet and Overlay technologies over Ethernet (802.3, 802.1q, 802.1ad QinQ, MPLS, 802.1ah mac-in-mac, Cisco Fabricpath, TRILL, OTV, LISP, VxLAN, NVGRE, and STT) are everywhere and in each presentation or implementation. So, let’s start from the beginning (which is 802.3 Ethernet) going to almost all New Ethernet or Overlay Ethernet frame encapsulation methods.

The main idea of this post is that I wanted to find most of the Ethernet encapsulations (as MPLS is L2.5 and the new Ethernet standards are considered to be L2 routing) put together to see the frame fields and the total frame sizes “on the wire”. The most important things in this post are the tables below, the rest of it only define the fields and give some more details, not necessarily all.