Ben's notes

• Hardware: PC Engines APU (1)
• OS: Voyage Linux 0.11

• eth0: management
• eth1: bridge with eth1
• eth2: bridge with eth2

• Install required packages:

  apt-get install bridge-utils

• Configure network:

  cat > /etc/network/interfaces <<'EOF'
  auto lo
  iface lo inet loopback
  
  source /etc/network/interfaces.d/*
  EOF
  
  cat > /etc/network/interfaces.d/eth0.conf <<'EOF'
  auto eth0
  iface eth0 inet dhcp
  EOF
  
  cat > /etc/network/interfaces.d/br0.conf <<'EOF'
  allow-hotplug eth1
  iface eth1 inet manual
  
  allow-hotplug eth2
  iface eth2 inet manual
  
  auto br0
  iface br0 inet manual
      bridge_ports eth1 eth2
      bridge_stp on
      bridge_maxwait 0
  EOF

Emulate lower bandwidth, packet loss, latency, etc.

• Example:

  # Clear queue discipline
  tc qdisc del dev eth1 root
  tc qdisc del dev eth2 root
  
  # Add 500msec latency
  tc qdisc add dev eth1 root handle 1:0 netem delay 500msec
  
  # Inspect rules
  tc -s qdisc ls dev eth1
  qdisc pfifo_fast 0: root refcnt 2 bands 3 priomap  1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1
   Sent 894508 bytes 1187 pkt (dropped 0, overlimits 0 requeues 0) 
   backlog 0b 0p requeues 0 
  
  # Never allow more than 10mbit
  tc qdisc add dev eth1 handle 1: root htb default 11
  tc class add dev eth1 parent 1: classid 1:1 htb rate 50mbit
  tc class add dev eth1 parent 1:1 classid 1:11 htb rate 50mbit
  tc qdisc add dev eth2 handle 1: root htb default 11
  tc class add dev eth2 parent 1: classid 1:1 htb rate 50mbit
  tc class add dev eth2 parent 1:1 classid 1:11 htb rate 50mbit