Please correct and add more protocol candidates

CAN

Pros

• simple, only 2 wire
• no controller needed on the backplane
• range
• transceivers cheap/plentiful

Cons

• speed
• difficulty of debugging
• each board needs a CAN transceiver IC
• Needs termination resistors on both ends

Ethernet

Pros

• debugging is easier
  
  • Talk to all boards with a standard PC
  • Talks to teensy
  • makes testing easier, simulation easier to implement
• works with pre-made tools
  • wireshark for debugging / capture of the network for playback
  • don't need to implement some kind of discovery protocol, just use ping
  • need some other functionality? it probably already exists
    • TFTP
    • SNTP
    • PTP
    • TCP
• ground hardware become trivial
  • forward network packets identically
• speed
  • really matters for video
• Can mix and match Ethernet chips as bandwidth needs change

Cons

• Routing is harder than CAN
  • Not harder enough to be an obstacle given current team composition
  • TI Application Note
• would need an Ethernet switch IC or several on the backplane
  • this requires routing from each board connector as well as power for the switch
• each board needs an Ethernet IC