SDN Lab with Ryu controller

Useful OpenvSwitch commands

Bridge

1. Add bridge

   sudo ovs-vsctl add-br ovs-br

2. mapping interface

   sudo ovs-vsctl add-port ovs-br eth0

3. 1+2

   sudo ovs−vsctl add−br ovs-br -- add−port ovs-br eth0

4. Remove bridge

   sudo ovs-vsctl del-br ovs-br

5. Remove bridge safety

   sudo ovs-vsctl --if-exists del-br ovs-br

Controller

1. Set controller

   sudo ovs-vsctl set-controller ovs-br tcp:127.0.0.1:6633

2. Set multi controller

   sudo ovs-vsctl set-controller ovs-br tcp:1.2.3.4:6633 tcp:5.6.7.8:6633

3. Remove controller

   sudo ovs-vsctl del-controller ovs-br

SDN version

1. OpenFlow Version 1.3

   sudo ovs-vsctl set bridge ovs-br protocols=OpenFlow13

2. OpenFlow Version 1.3 1.2

   sudo ovs-vsctl set bridge ovs-br protocols=OpenFlow12,OpenFlow13

3. Remove

   sudo ovs-vsctl clear bridge ovs-br protocols

Dump flow

1. Dumps OpenFlow flows without hidden flows

   sudo ovs-ofctl dump-flows ovs-br

2. Dumps OpenFlow flows with hidden flows

   sudo ovs-appctl bridge/dump-flows ovs-br

3. Dumps particular bridge's datapath flows

   sudo ovs-appctl dpif/dump-flows ovs-br

4. Dumps Linux kernel datapath flow table

   sudo ovs-dpctl dump-flows [dp]

VLan

1. Set VLAN tag

   sudo ovs-vsctl add-port ovs-br vlan3 tag=3 -- set interface vlan3 type=internal

2. Remove VLAN tag

   sudo ovs-vsctl del-port ovs-br vlan3

3. Set VLAN trunk (default allow all)

   sudo ovs-vsctl add-port ovs-br eth0 trunk=3,4,5,6

4. Show switch port infomation

   sudo ovs-vsctl list port brLAN

5. Set access port

   sudo ovs-vsctl set port brLAN trunk=3,4,5,6

Switch infomation

1. Show switch setting

   sudo ovs-vsctl show

2. Show switch port info

   sudo ovs-dpctl show

Lab 1: Source NAT

# This program was modified from simple_switch_13.py and kevin's NAT.

Main purpose

• Provide a particular local area network, myLAN, source NAT service (port mapping).
• The network except myLAN do simple switch networking (L2 learning).

cd /src3/KVM/ryu

PYTHONPATH=. ./bin/ryu-manager ../kevin/NAT-suv0_2.py

Lab 2: Trunk

sudo ovs-vsctl add-br brLAN

sudo ovs-vsctl add-port brLAN eth0

sudo ovs-vsctl del-controller brWAN

sudo ovs-vsctl set-controller brLAN tcp:127.0.0.1:6633

Lab 3: Tunnel

QinQ, VLAN, VxLan, GRE, ...