UNOLS Satellite and Network Advisory Group

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===== Multipath WAN Network Testing =====
To test different network paths from ship to shore using each WAN option directly. For this test we used a [[https://fit-iot.com/web/products/fitlet2 |fitlet2]] computer with 4 Gigibit Ethernet ports.

=== Hardware Used ===

  fitlet2 J3455 Barebone
  16 GB RAM for Fitlet2
  512 GB SATA SSD for fitlet2
  FC-M2LAN FACET-Card (2x Gbit Ethernet)

=== Operating System ===

 [[https://linuxmint.com/download.php | Ubuntu Mint 20]]. 

==== Magic Sauce ====
Edit **///etc/network/interfaces//** and add a static IP for each WAN

  auto eth0
  iface eth0 inet static
      address [[KA]]
      netmask [[255.255.255.0]]
      network [[KA network IP]]
      broadcast [[KA Broadcast]]
      
      
Edit **///etc/iproute2/rt_tables //** to create local tables
  #
  # reserved values
  #
  255    local
  254    main
  253    default
  0    unspec
  #
  # local
  # Create multipath routing tables for Sealink and KA and Cell if available
  # A table can also be created to send traffic out the regular ship (via cyberoam and peplink)
  1   sealink
  2   ka
  3   cell
  4   ship    

Create **///root/bin/multipath.sh//** 
  
The multipath script needs to be run as sudo, so have installed it in /root/bin

  # multipath.sh
  # script to add routes out each WAN using tables created above
  ip route add default via [[ka static ip]] dev [[ka eth]] table ka
  ip route add default via [[sealink static ip]] dev [[sealink eth]] table hsn
  ip route add default via [[cell static ip]] dev [[cell eth]] table cell
  ip route add default via [[ship static ip]] dev [[ship eth]] table ship
  
  # Add rules to the rules 
  ip rule add from [[ka static ip]] table ka
  ip rule add from [[sealink static ip]] table hsn
  ip rule add from [[cell static ip]] table cell
  ip rule add from [[ship static ip]] table ship
  ip rule list