# 8/12 Test VxLAN on pure legacy network

[TOC]

## Topology

* Entire Network


* VM1


* VM2


* VM3


## Environment

### VM1
* Hardware setting
* interface: enp0s3
* ip address: 192.168.56.101/24
* default gateway: 192.168.56.102 (VM3)
* Mininet
* s1
* s1-eth1: connected to h1
* vxlan: VxLAN interface
* h1
* ip address: 10.0.0.1
### VM2
* Hardware setting
* interface: enp0s3
* ip address: 192.168.7.3/24
* default gateway: 192.168.7.4 (VM3)
* Mininet
* s1
* s1-eth1: connected to h1
* vxlan: VxLAN interface
* h1
* ip address: 10.0.0.2
### VM3
* Interfaces
* enp0s3: connected to s1
* enp0s8: connected to s2
* Mininet
* s1
* s1-eth1: connect to s2
* ip address: 192.168.56.102/24
* s2
* s2-eth1: connect to s1
* ip address: 192.168.7.4/24

## Commands

### VM1

# create a topology with a switch(s1) and a host(h1)
$ sudo mn --topo single,1
# add a port on s1, set the type to vxlan
$mininet > sh ovs-vsctl add-port s1 vxlan -- set interface vxlan type=vxlan option:remote_ip=192.168.7.3 option:key=100

### VM2

# create a topology with a switch(s1) and a host(h1)
$ sudo mn --topo single,1
# add a port on s1, set the type as vxlan
$mininet > sh ovs-vsctl add-port s1 vxlan -- set interface vxlan type=vxlan option:remote_ip=192.168.56.101 option:key=100
# set h1's ip address to 10.0.0.2
$mininet > h1 ifconfig h1-eth0 10.0.0.2

### VM3

* <span>topo.py</span>

from mininet.topo import Topo

class MyTopo( Topo ):
    def __init__( self ):
        Topo.__init__( self )

        # Add switches
        s1 = self.addSwitch( 's1' )
        s2 = self.addSwitch( 's2' )
        
        # Add links
        self.addLink( s1, s2 )


topos = { 'mytopo': MyTopo }

* Terminal Command

$ sudo mn --custom topo.py --topo mytopo
# bind ethernet interfaces on ovs bridges
$ sudo ovs-vsctl add-port s1 enp0s3
$ sudo ovs-vsctl add-port s2 enp0s8
# allocate ip addresses for ovs bridges
$ sudo dhclient enp0s3
$ sudo dhclient enp0s8

# add flow rules on s1
$ sudo ovs-ofctl add-flow s1 'priority=50000,udp,nw_dst=192.168.7.3,actions=output:1'
$ sudo ovs-ofctl add-flow s1 'priority=50000,udp,nw_dst=192.168.56.101,actions=output:2,mod_dl_src:08:00:27:c4:d9:6f,mod_dl_dst:08:00:27:91:1b:a1'

# add flow rules on s2
$ sudo ovs-ofctl add-flow s2 'priority=50000,udp,nw_dst=192.168.56.101,actions=output:1'
$ sudo ovs-ofctl add-flow s2 'priority=50000,udp,nw_dst=192.168.7.3,actions=output:2,mod_dl_src:08:00:27:10:6b:6c,mod_dl_dst:ff:ff:ff:ff:ff:ff'

## Result