Notes - Network Simulation and Analysis
  • 網路模擬與分析
  • 期中
    • 20210222 Ubuntu 與 Mininet 的安裝
    • 20210308 Iperf
    • 20210315 Gnuplot
    • 20210322 Bridge ( 一 )
    • 20210329 Bridge ( 二 )
    • 20210412 Openvswitch ( 一 )
    • 20210419 期中週
  • 期末
    • 20210426 Group Table
    • 20210503 Containernet / Mininet-Wifi ( Miniedit )
    • 20210510 Programming Protocol-independent Packet Processors ( P4 ) - 1
    • 20210517 Programming Protocol-independent Packet Processors ( P4 ) - 2
    • 20210524 Programming Protocol-independent Packet Processors ( P4 ) - 3
    • 20210531 Programming Protocol-independent Packet Processors ( P4 ) - 4
    • 20210607 Programming Protocol-independent Packet Processors ( P4 ) - Finish
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  • 課堂資料
  • 課堂練習
  • 4.py
  • 5.py
  • Bridge

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  1. 期中

20210322 Bridge ( 一 )

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Last updated 4 years ago

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課堂資料

課堂練習

cd mininet
mkdir mytest
cd mytest

4.py

gedit 4.py

4.py

#!/usr/bin/env python
from mininet.cli import CLI
from mininet.net import Mininet
from mininet.link import Link,TCLink
 
if '__main__' == __name__:
  net = Mininet(link=TCLink)
  h1 = net.addHost('h1')
  h2 = net.addHost('h2')
  r1 = net.addHost('r1')
  r2 = net.addHost('r2')
  Link(h1, r1)
  Link(h2, r2)
  Link(r1, r2)
  net.build()
  h1.cmd("ifconfig h1-eth0 0")
  h1.cmd("ip addr add 192.168.1.1/24 brd + dev h1-eth0")
  h1.cmd("ip route add default via 192.168.1.254")
  h2.cmd("ifconfig h2-eth0 0")
  h2.cmd("ip addr add 192.168.2.1/24 brd + dev h2-eth0")
  h2.cmd("ip route add default via 192.168.2.254")
  r1.cmd("ifconfig r1-eth0 0")
  r1.cmd("ifconfig r1-eth1 0")
  r1.cmd("ip addr add 192.168.1.254/24 brd + dev r1-eth0")
  r1.cmd("ip addr add 10.0.0.1/24 brd + dev r1-eth1")
  r1.cmd("echo 1 > /proc/sys/net/ipv4/ip_forward")
  r1.cmd("ip route add 192.168.2.0/24 via 10.0.0.2")
  r2.cmd("ifconfig r2-eth0 0")
  r2.cmd("ifconfig r2-eth1 0")
  r2.cmd("ip addr add 192.168.2.254/24 brd + dev r2-eth0")
  r2.cmd("ip addr add 10.0.0.2/24 brd + dev r2-eth1")
  r2.cmd("echo 1 > /proc/sys/net/ipv4/ip_forward")
  r2.cmd("ip route add 192.168.1.0/24 via 10.0.0.1")
  CLI(net)
  net.stop()
python 4.py
xterm r1 r2 
ip ro sh
exit
python 4.py
xterm h1 h2 
ping 192.168.2.1
exit

5.py

gedit 5.py

5.py

#!/usr/bin/env python
from mininet.cli import CLI
from mininet.net import Mininet
from mininet.link import Link,TCLink
 
if '__main__' == __name__:
  net = Mininet(link=TCLink)
  h1 = net.addHost('h1')
  h2 = net.addHost('h2')
  r1 = net.addHost('r1')
  r2 = net.addHost('r2')
  Link(h1, r1)
  Link(h2, r2)
  Link(r1, r2)
  net.build()
  h1.cmd("ifconfig h1-eth0 0")
  h1.cmd("ip addr add 192.168.1.1/24 brd + dev h1-eth0")
  h1.cmd("ip route add default via 192.168.1.254")
  h2.cmd("ifconfig h2-eth0 0")
  h2.cmd("ip addr add 22.1.1.1/24 brd + dev h2-eth0")
  h2.cmd("ip route add default via 22.1.1.254")
  r1.cmd("ifconfig r1-eth0 0")
  r1.cmd("ifconfig r1-eth1 0")
  r1.cmd("ip addr add 192.168.1.254/24 brd + dev r1-eth0")
  r1.cmd("ip addr add 12.1.1.1/24 brd + dev r1-eth1")
  r1.cmd("ip route add default via 12.1.1.2")
  r1.cmd("echo 1 > /proc/sys/net/ipv4/ip_forward")
  r1.cmd("iptables -t nat -A POSTROUTING -o r1-eth1 -s 192.168.1.0/24 -j MASQUERADE")
  r2.cmd("ifconfig r2-eth0 0")
  r2.cmd("ifconfig r2-eth1 0")
  r2.cmd("ip addr add 22.1.1.254/24 brd + dev r2-eth0")
  r2.cmd("ip addr add 12.1.1.2/24 brd + dev r2-eth1")
  r2.cmd("echo 1 > /proc/sys/net/ipv4/ip_forward")
  CLI(net)
  net.stop()
python 5.py
xterm h1 r1 r1
wireshark
wireshark
 ping 22.1.1.2 -c 5
h1 ping h2 -c 5
ping 127.0.0.1 -c 5
ping 192.168.1.1 -c 5
ping 192.168.1.254 -c 5
ping 12.1.1.1 -c 5
exit
cd ..
cd ..

Bridge

mkdir test-mininet
cd test-mininet
mkdir bridge
cd bridge
apt install bridge-utils
gedit 1.py

1.py

#! /usr/bin/env python
from mininet.cli import CLI
from mininet.net import Mininet
from mininet.link import Link,TCLink,Intf

if '__main__' == __name__:
  net = Mininet(link=TCLink)
  h1 = net.addHost('h1')
  h2 = net.addHost('h2')
  h3 = net.addHost('h3')
  br1 = net.addHost('br1')
  net.addLink(h1, br1)
  net.addLink(h2, br1)
  net.addLink(h3, br1)
  net.build()
  h1.cmd("ifconfig h1-eth0 0")
  h2.cmd("ifconfig h2-eth0 0")
  h3.cmd("ifconfig h3-eth0 0")
  br1.cmd("ifconfig br1-eth0 0")
  br1.cmd("ifconfig br1-eth1 0")
  br1.cmd("ifconfig br1-eth2 0")
  br1.cmd("brctl addbr mybr")
  br1.cmd("brctl addif mybr br1-eth0")
  br1.cmd("brctl addif mybr br1-eth1")
  br1.cmd("brctl addif mybr br1-eth2")
  br1.cmd("ifconfig mybr up")
  h1.cmd("ip address add 192.168.10.1/24 dev h1-eth0")
  h2.cmd("ip address add 192.168.10.2/24 dev h2-eth0")
  h3.cmd("ip address add 192.168.10.3/24 dev h3-eth0")
  CLI(net)
  net.stop()
python 1.py
h1 ping h2 -c 5
h1 ping h3 -c 5
exit
python 1.py
xterm br1
ifconfig
brctl addbr mybr
brctl show
brctl addif mybr br1-eth0
brctl show
brctl addif mybr br1-eth1
brctl addif mybr br1-eth2
brctl show
ifconfig -a
ifconfig mybr up
ifconfig
h1 ping h2 -c 5
h1 ping h3 -c 5
h2 ping h3 -c 5
xterm h2
tcpdump -i h2-eth0
h1 ping h3 -c 5
exit
gedit 2.py

2.py

#! /usr/bin/env python
from mininet.cli import CLI
from mininet.net import Mininet
from mininet.link import Link,TCLink,Intf

if '__main__' == __name__:
  net = Mininet(link=TCLink)
  h1 = net.addHost('h1')
  h2 = net.addHost('h2')
  h3 = net.addHost('h3')
  h4 = net.addHost('h4')
  br1 = net.addHost('br1')
  net.addLink(h1, br1)
  net.addLink(h2, br1)
  net.addLink(h3, br1)
  net.addLink(h4, br1)
  net.build()
  h1.cmd("ifconfig h1-eth0 0")
  h2.cmd("ifconfig h2-eth0 0")
  h3.cmd("ifconfig h3-eth0 0")
  h3.cmd("ifconfig h4-eth0 0")
  br1.cmd("ifconfig br1-eth0 0")
  br1.cmd("ifconfig br1-eth1 0")
  br1.cmd("ifconfig br1-eth2 0")
  br1.cmd("ifconfig br1-eth3 0")
  br1.cmd("brctl addbr mybr1")
  br1.cmd("brctl addbr mybr2")
  br1.cmd("brctl addif mybr1 br1-eth0")
  br1.cmd("brctl addif mybr1 br1-eth1")
  br1.cmd("brctl addif mybr2 br1-eth2")
  br1.cmd("brctl addif mybr2 br1-eth3")
  br1.cmd("ifconfig mybr1 up")
  br1.cmd("ifconfig mybr2 up")
  h1.cmd("ip address add 192.168.10.1/24 dev h1-eth0")
  h2.cmd("ip address add 192.168.10.2/24 dev h2-eth0")
  h3.cmd("ip address add 192.168.20.1/24 dev h3-eth0")
  h4.cmd("ifconfig h4-eth0 192.168.20.2/4")
  CLI(net)
  net.stop()
python 2.py
br1 ifconfig
br1 brctl show
h1 ping h2 -c 5
h1 ping h3
h1 ping h4
h3 ping h4 -c 5
exit
gedit 2.py

2.py

#! /usr/bin/env python
from mininet.cli import CLI
from mininet.net import Mininet
from mininet.link import Link,TCLink,Intf

if '__main__' == __name__:
  net = Mininet(link=TCLink)
  h1 = net.addHost('h1')
  h2 = net.addHost('h2')
  h3 = net.addHost('h3')
  h4 = net.addHost('h4')
  br1 = net.addHost('br1')
  net.addLink(h1, br1)
  net.addLink(h2, br1)
  net.addLink(h3, br1)
  net.addLink(h4, br1)
  net.build()
  h1.cmd("ifconfig h1-eth0 0")
  h2.cmd("ifconfig h2-eth0 0")
  h3.cmd("ifconfig h3-eth0 0")
  h3.cmd("ifconfig h4-eth0 0")
  br1.cmd("ifconfig br1-eth0 0")
  br1.cmd("ifconfig br1-eth1 0")
  br1.cmd("ifconfig br1-eth2 0")
  br1.cmd("ifconfig br1-eth3 0")
  br1.cmd("brctl addbr mybr1")
  br1.cmd("brctl addbr mybr2")
  br1.cmd("brctl addif mybr1 br1-eth0")
  br1.cmd("brctl addif mybr1 br1-eth1")
  br1.cmd("brctl addif mybr2 br1-eth2")
  br1.cmd("brctl addif mybr2 br1-eth3")
  br1.cmd("ifconfig mybr1 up")
  br1.cmd("ifconfig mybr2 up")
  h1.cmd("ip address add 192.168.10.1/24 dev h1-eth0")
  h2.cmd("ip address add 192.168.10.2/24 dev h2-eth0")
  h3.cmd("ip address add 192.168.20.1/24 dev h3-eth0")
  h4.cmd("ip address add 192.168.20.2/24 dev h4-eth0")
  CLI(net)
  net.stop()
python 2.py
h1 ping h2 -c 5
h1 ping h3
h1 ping h4
h3 ping h4
h3 ifconfig
h4 ifconfig
h4 ifconfig h4-eth0 0
h4 ifconfig h4-eth0 192.168.20.2/24
h3 ping h4 -c 5
exit
gedit 3.py

3.py

#! /usr/bin/env python
from mininet.cli import CLI
from mininet.net import Mininet
from mininet.link import Link,TCLink,Intf

if '__main__' == __name__:
  net = Mininet(link=TCLink)
  h1 = net.addHost('h1')
  h2 = net.addHost('h2')
  h3 = net.addHost('h3')
  h4 = net.addHost('h4')
  br1 = net.addHost('br1')
  r1 = net.addHost('r1')
  net.addLink(h1, br1)
  net.addLink(h2, br1)
  net.addLink(h3, br1)
  net.addLink(h4, br1)
  net.addLink(br1,r1)
  net.addLink(br1,r1)
  net.build()
  h1.cmd("ifconfig h1-eth0 0")
  h2.cmd("ifconfig h2-eth0 0")
  h3.cmd("ifconfig h3-eth0 0")
  h4.cmd("ifconfig h4-eth0 0")
  br1.cmd("ifconfig br1-eth0 0")
  br1.cmd("ifconfig br1-eth1 0")
  br1.cmd("ifconfig br1-eth2 0")
  br1.cmd("ifconfig br1-eth3 0")
  br1.cmd("ifconfig br1-eth4 0")
  br1.cmd("ifconfig br1-eth5 0")
  br1.cmd("brctl addbr mybr1")
  br1.cmd("brctl addbr mybr2")
  br1.cmd("brctl addif mybr1 br1-eth0")
  br1.cmd("brctl addif mybr1 br1-eth1")
  br1.cmd("brctl addif mybr1 br1-eth4")
  br1.cmd("brctl addif mybr2 br1-eth2")
  br1.cmd("brctl addif mybr2 br1-eth3")
  br1.cmd("brctl addif mybr2 br1-eth5")
  br1.cmd("ifconfig mybr1 up")
  br1.cmd("ifconfig mybr2 up")
  r1.cmd('ifconfig r1-eth0 192.168.10.254 netmask 255.255.255.0')
  r1.cmd('ifconfig r1-eth1 192.168.20.254 netmask 255.255.255.0')
  r1.cmd("echo 1 > /proc/sys/net/ipv4/ip_forward")
  h1.cmd("ip address add 192.168.10.1/24 dev h1-eth0")
  h1.cmd("ip route add default via 192.168.10.254")
  h2.cmd("ip address add 192.168.10.2/24 dev h2-eth0")
  h2.cmd("ip route add default via 192.168.10.254")
  h3.cmd("ip address add 192.168.20.1/24 dev h3-eth0")
  h3.cmd("ip route add default via 192.168.20.254")
  h4.cmd("ip address add 192.168.20.2/24 dev h4-eth0")
  h4.cmd("ip route add default via 192.168.20.254")
  CLI(net)
  net.stop()
python 3.py
net
br1 brctl show
h1 ping h2 -c 5
h1 ping h3 -c 5
h1 ping h4 -c 5
exit
apt install vlan
gedit 4.py

4.py

#! /usr/bin/env python
from mininet.cli import CLI
from mininet.net import Mininet
from mininet.link import Link,TCLink,Intf

if '__main__' == __name__:
  net = Mininet(link=TCLink)
  h1 = net.addHost('h1')
  h2 = net.addHost('h2')
  h3 = net.addHost('h3')
  h4 = net.addHost('h4')
  br1 = net.addHost('br1')
  r1 = net.addHost('r1')
  net.addLink(h1, br1)
  net.addLink(h2, br1)
  net.addLink(h3, br1)
  net.addLink(h4, br1)
  net.addLink(br1,r1)
  net.build()
  h1.cmd("ifconfig h1-eth0 0")
  h2.cmd("ifconfig h2-eth0 0")
  h3.cmd("ifconfig h3-eth0 0")
  h4.cmd("ifconfig h4-eth0 0")
  r1.cmd("ifconfig r1-eth0 0")
  br1.cmd("ifconfig br1-eth0 0")
  br1.cmd("ifconfig br1-eth1 0")
  br1.cmd("ifconfig br1-eth2 0")
  br1.cmd("ifconfig br1-eth3 0")
  br1.cmd("ifconfig br1-eth4 0")
  br1.cmd("vconfig add br1-eth4 10")
  br1.cmd("vconfig add br1-eth4 20")
  r1.cmd("vconfig add r1-eth0 10")
  r1.cmd("vconfig add r1-eth0 20")
  br1.cmd("brctl addbr mybr10")
  br1.cmd("brctl addbr mybr20")
  br1.cmd("brctl addif mybr10 br1-eth0")
  br1.cmd("brctl addif mybr10 br1-eth1")
  br1.cmd("brctl addif mybr10 br1-eth4.10")
  br1.cmd("brctl addif mybr20 br1-eth2")
  br1.cmd("brctl addif mybr20 br1-eth3")
  br1.cmd("brctl addif mybr20 br1-eth4.20")
  br1.cmd("ifconfig br1-eth4.10 up")
  br1.cmd("ifconfig br1-eth4.20 up")
  r1.cmd("ifconfig r1-eth0.10 up")
  r1.cmd("ifconfig r1-eth0.20 up")
  br1.cmd("ifconfig mybr10 up")
  br1.cmd("ifconfig mybr20 up")
  r1.cmd('ifconfig r1-eth0.10 192.168.10.254 netmask 255.255.255.0')
  r1.cmd('ifconfig r1-eth0.20 192.168.20.254 netmask 255.255.255.0')
  r1.cmd("echo 1 > /proc/sys/net/ipv4/ip_forward")
  h1.cmd("ip address add 192.168.10.1/24 dev h1-eth0")
  h1.cmd("ip route add default via 192.168.10.254")
  h2.cmd("ip address add 192.168.10.2/24 dev h2-eth0")
  h2.cmd("ip route add default via 192.168.10.254")
  h3.cmd("ip address add 192.168.20.1/24 dev h3-eth0")
  h3.cmd("ip route add default via 192.168.20.254")
  h4.cmd("ip address add 192.168.20.2/24 dev h4-eth0")
  h4.cmd("ip route add default via 192.168.20.254")
  CLI(net)
  net.stop()
python 4.py
xterm br1 r1
ifconfig
ifconfig
h1 ping h2 -c 5
h1 ping h3 -c 5
h1 ping h4 -c 5
wireshark
h1 ping h3 -c 5
exit
gedit test.py

test.py

#! /usr/bin/env python
from mininet.cli import CLI
from mininet.net import Mininet
from mininet.link import Link,TCLink,Intf

if 'main' == name:
  net = Mininet(link=TCLink)
  h1 = net.addHost('h1')
  h2 = net.addHost('h2')
  h3 = net.addHost('h3')
  h4 = net.addHost('h4')
  br1 = net.addHost('br1')
  r1 = net.addHost('r1')
  net.addLink(h1, br1)
  net.addLink(h2, br1)
  net.addLink(h3, br1)
  net.addLink(h4, br1)
  net.addLink(br1,r1)
  net.build()
  h1.cmd("ifconfig h1-eth0 0")
  h2.cmd("ifconfig h2-eth0 0")
  h3.cmd("ifconfig h3-eth0 0")
  h4.cmd("ifconfig h4-eth0 0")
  r1.cmd("ifconfig r1-eth0 0")
  br1.cmd("ifconfig br1-eth0 0")
  br1.cmd("ifconfig br1-eth1 0")
  br1.cmd("ifconfig br1-eth2 0")
  br1.cmd("ifconfig br1-eth3 0")
  br1.cmd("ifconfig br1-eth4 0")
  br1.cmd("vconfig add br1-eth4 10")
  br1.cmd("vconfig add br1-eth4 20")
  r1.cmd("vconfig add r1-eth0 10")
  r1.cmd("vconfig add r1-eth0 20")
  br1.cmd("brctl addbr mybr10")
  br1.cmd("brctl addbr mybr20")
  br1.cmd("brctl addif mybr10 br1-eth0")
  br1.cmd("brctl addif mybr10 br1-eth1")
  br1.cmd("brctl addif mybr10 br1-eth4.10")
  br1.cmd("brctl addif mybr20 br1-eth2")
  br1.cmd("brctl addif mybr20 br1-eth3")
  br1.cmd("brctl addif mybr20 br1-eth4.20")
  br1.cmd("ifconfig br1-eth4.10 up")
  br1.cmd("ifconfig br1-eth4.20 up")
  r1.cmd("ifconfig r1-eth0.10 up")
  r1.cmd("ifconfig r1-eth0.20 up")
  br1.cmd("ifconfig mybr10 up")
  br1.cmd("ifconfig mybr20 up")
  r1.cmd('ifconfig r1-eth0.10 192.168.10.254 netmask 255.255.255.0')
  r1.cmd('ifconfig r1-eth0.20 192.168.20.254 netmask 255.255.255.0')
  r1.cmd("echo 1 > /proc/sys/net/ipv4/ip_forward")
  h1.cmd("ip address add 192.168.10.1/24 dev h1-eth0")
  h1.cmd("ip route add default via 192.168.10.254")
  h2.cmd("ip address add 192.168.10.2/24 dev h2-eth0")
  h2.cmd("ip route add default via 192.168.10.254")
  h3.cmd("ip address add 192.168.20.1/24 dev h3-eth0")
  h3.cmd("ip route add default via 192.168.20.254")
  h4.cmd("ip address add 192.168.20.2/24 dev h4-eth0")
  h4.cmd("ip route add default via 192.168.20.254")
  CLI(net)
  net.stop()
sed -i '/^$/d' test.py

  • 將原來的所有空行刪除並在每一行後面增加一空行

  • 這樣在輸出的文本中每一行後面將有且只有一空行

gedit test.py
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