set ns [new Simulator]
source tb_compat.tcl

# Nodes
set node10 [$ns node]
set node1 [$ns node]
set node0 [$ns node]
set node2 [$ns node]
set node20 [$ns node]

# Hardware
tb-set-hardware $node10 pc3000
tb-set-hardware $node1 pc3000
tb-set-hardware $node0 pc3000
tb-set-hardware $node2 pc3000
tb-set-hardware $node20 pc3000

# OS
tb-set-node-os $node10 Ubuntu-fwp
tb-set-node-os $node1 Ubuntu-fwp
tb-set-node-os $node0 Ubuntu-fwp
tb-set-node-os $node2 Ubuntu-fwp
tb-set-node-os $node20 Ubuntu-fwp

# Lans
set lan1 [$ns make-lan "$node10 $node1 " 1000Mb 0ms] 
set lan3 [$ns make-lan " $node2 $node20 " 1000Mb 0ms]


# Links
set link1 [$ns duplex-link $node1 $node0 1000000.0kb 50.0ms DropTail]
set link2 [$ns duplex-link $node0 $node2 1000000.0kb 0.0ms DropTail]

$ns rtproto Static
$ns run