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Mininet Basics

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Eueung Mulyana, profile picture
Eueung Mulyana

This document provides an overview of Mininet, including getting started instructions, examples of usage, and tutorials on OpenFlow and MiniNAM. It outlines how to import a pre-made Mininet VM, configure access via SSH, test connectivity using ping and Wireshark, explore the included examples and topologies, add manual flow entries, capture and inspect OpenFlow packets, start an OpenFlow controller, and benchmark kernel-space versus user-space switches. Notes are also provided on using xterm, tcpdump, and ARP with Mininet hosts.

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1 / 61 EL-5244 MininetBasics Eueung Mulyana https://telematika.org/remark/mininet CodeLabs | Attribution-ShareAlike CC BY-SA
Outline Introduction Getting Started MiniNAM OpenFlow Tutorial POX Controller 2 / 61
Mininet 2.2.2 on Ubuntu 14.04 LTS - 64 bit, o cial VM | POX 0.2.0 (carp) | OVS (Open vSwitch) 2.0.2 VirtualBox 5.2.6 on Ubuntu Xenial 16.04.3. Ref: [Mininet VM Images] 3 / 61
Introduction 4 / 61
Mininet provides a virtual test bed and development environment for SDN 5 / 61
6 / 61 Mininet enables Rapid prototyping of software-de ned networks Complex topology testing without the need to wire up a physical network Multiple concurrent developers to work independently on the same topology
7 / 61 Mininet networks run real code including standard Unix/Linux network applications as well as the real Linux kernel and network stack. Mininet provides an extensible Python API for network creation and experimentations. Ref: MININET - Open Networking Foundation
Getting Started 8 / 61
9 / 61 Mininet Setup Using Pre-Made VM Download a Mininet VM Image Import the Image (eg. into VirtualBox) Con gure Access (eg. port forwarding or host-only networking) Run the VM Access via SSH with Remote Display Forwarding Enabled Note: in the o cial Mininet VM image version 2.2.2, there is possibly a con guration bug if you're using VirtualBox. See comments by isams1 in this thread. So don't use host-only networking to access the VM.
Import Appliance 10 / 61
Import Appliance 11 / 61
Con gure Access 12 / 61
Con gure Access - Port Forwarding 13 / 61
Con gure Access - Port Forwarding 14 / 61
Run the VM 15 / 61
Access via SSH 16 / 61
Test 17 / 61
Test - Wireshark 18 / 61
19 / 61 Check $ ssh -Y -l mininet -p 2222 localhost mininet@mininet-vm:~$ sudo cp /etc/apt/sources.list /etc/apt/sources.list.ori mininet@mininet-vm:~$ sudo sed -i 's/http://us.archive.ubuntu.com/ubuntu//http://kambing.u mininet@mininet-vm:~$ sudo apt-get update mininet@mininet-vm:~$ sudo apt-get install tree mininet@mininet-vm:~$ tree -L 1 . |-- install-mininet-vm.sh |-- loxigen |-- mininet |-- oflops |-- oftest |-- openflow |-- pox
20 / 61 Check mininet@mininet-vm:~/mininet$ tree -L 2 -d . |-- bin |-- build | |-- bdist.linux-x86_64 | |-- lib.linux-x86_64-2.7 | |-- scripts-2.7 |-- custom |-- debian | |-- source |-- dist |-- doc |-- examples | |-- test |-- mininet | |-- examples -> ../examples | |-- test |-- mininet.egg-info |-- util |-- kbuild |-- nox-patches |-- openflow-patches |-- sch_htb-ofbuf |-- vm
mininet@mininet-vm:~/mininet/examples$ ll total 364 drwxrwxr-x 3 mininet mininet 4096 Mar 21 2017 ./ drwxrwxr-x 13 mininet mininet 4096 Mar 21 2017 ../ -rw-rw-r-- 1 mininet mininet 4965 Mar 21 2017 README.md -rw-rw-r-- 1 mininet mininet 48 Mar 21 2017 __init__.py -rwxrwxr-x 1 mininet mininet 1074 Mar 21 2017 baresshd.py* -rwxrwxr-x 1 mininet mininet 2310 Mar 21 2017 bind.py* -rwxrwxr-x 1 mininet mininet 33427 Mar 21 2017 cluster.py* -rwxrwxr-x 1 mininet mininet 501 Mar 21 2017 clusterSanity.py* -rw-rw-r-- 1 mininet mininet 3875 Mar 21 2017 clustercli.py -rwxrwxr-x 1 mininet mininet 639 Mar 21 2017 clusterdemo.py* -rwxrwxr-x 1 mininet mininet 15612 Mar 21 2017 consoles.py* -rwxrwxr-x 1 mininet mininet 1061 Mar 21 2017 controllers.py* -rwxrwxr-x 1 mininet mininet 1612 Mar 21 2017 controllers2.py* -rwxrwxr-x 1 mininet mininet 4967 Mar 21 2017 controlnet.py* -rwxrwxr-x 1 mininet mininet 3725 Mar 21 2017 cpu.py* -rwxrwxr-x 1 mininet mininet 960 Mar 21 2017 emptynet.py* -rwxrwxr-x 1 mininet mininet 1549 Mar 21 2017 hwintf.py* -rwxrwxr-x 1 mininet mininet 1320 Mar 21 2017 intfoptions.py* -rwxrwxr-x 1 mininet mininet 2034 Mar 21 2017 limit.py* -rwxrwxr-x 1 mininet mininet 4062 Mar 21 2017 linearbandwidth.py* -rwxrwxr-x 1 mininet mininet 2826 Mar 21 2017 linuxrouter.py* -rwxrwxr-x 1 mininet mininet 154479 Mar 21 2017 miniedit.py* -rwxrwxr-x 1 mininet mininet 4198 Mar 21 2017 mobility.py* -rwxrwxr-x 1 mininet mininet 834 Mar 21 2017 multilink.py* -rwxrwxr-x 1 mininet mininet 2235 Mar 21 2017 multiping.py* -rwxrwxr-x 1 mininet mininet 2469 Mar 21 2017 multipoll.py* -rwxrwxr-x 1 mininet mininet 1049 Mar 21 2017 multitest.py* -rwxrwxr-x 1 mininet mininet 550 Mar 21 2017 nat.py* -rwxrwxr-x 1 mininet mininet 1948 Mar 21 2017 natnet.py* -rwxrwxr-x 1 mininet mininet 2330 Mar 21 2017 numberedports.py* -rwxrwxr-x 1 mininet mininet 1023 Mar 21 2017 popen.py* -rwxrwxr-x 1 mininet mininet 932 Mar 21 2017 popenpoll.py* -rwxrwxr-x 1 mininet mininet 2032 Mar 21 2017 scratchnet.py* -rwxrwxr-x 1 mininet mininet 2455 Mar 21 2017 scratchnetuser.py* -rwxrwxr-x 1 mininet mininet 1888 Mar 21 2017 simpleperf.py* -rwxrwxr-x 1 mininet mininet 3040 Mar 21 2017 sshd.py* drwxrwxr-x 2 mininet mininet 4096 Mar 21 2017 test/ -rwxrwxr-x 1 mininet mininet 522 Mar 21 2017 tree1024.py* -rwxrwxr-x 1 mininet mininet 950 Mar 21 2017 treeping64.py* -rwxrwxr-x 1 mininet mininet 3679 Mar 21 2017 vlanhost.py* 21 / 61 Check
22 / 61 Notes Mininet Walkthrough $ sudo mn [--topo=minimal] $ sudo mn --test pingpair $ sudo mn --test iperf $ sudo mn --link tc,bw=10,delay=10ms $ sudo mn --test pingall --topo single,3 $ sudo mn --test pingall --topo mytopo --custom ~/mininet/custom/topo-2sw-2host.py $ sudo mn --mac mininet> h1 ping -c10 h2 mininet> pingall mininet> h1 python -m SimpleHTTPServer 80 & mininet> h2 wget -O - h1 mininet> iperf mininet> link s1 h1 down mininet> link s1 h1 up $ sudo ~/mininet/examples/sshd.py Ref: Mininet Walkthrough - Mininet
23 / 61 Notes Mininet Sample Work ow # Creating a Network $ sudo mn --switch ovs --controller ref --topo tree,depth=2,fanout=8 --test pingall # Interacting with a Network mininet> h2 ping h3 mininet> h2 python -m SimpleHTTPServer 80 >& /tmp/http.log & mininet> h3 wget -O - h2 # Customizing a Network from mininet.net import Mininet from mininet.topolib import TreeTopo tree4 = TreeTopo(depth=2,fanout=2) net = Mininet(topo=tree4) net.start() h1, h4 = net.hosts[0], net.hosts[3] print h1.cmd('ping -c1 %s' % h4.IP()) net.stop() Ref: Mininet Sample Work ow - Mininet
MiniNAM 24 / 61
25 / 61 MiniNAM A utility that provides real-time animation of any network created by the Mininet emulator. MiniNAM includes all the components required to initiate, visualize and modify Mininet network ows in real-time. MiniNAM provides a graphical user interface that allows dynamic modi cation of preferences and packet lters: a user can view selective ows with options to color code packets based on packet type and/or nodes (hosts). Ref: MiniNAM | University College Cork
26 / 61 Setup $ ssh -Y -l mininet -p 2222 localhost $ sudo apt-get install git python-imaging python-imaging-tk $ git clone https://github.com/uccmisl/MiniNAM.git mininet@mininet-vm:~/MiniNAM$ tree . |-- conf.config |-- Examples | |-- LoadBalancer | | |-- install.sh | | |-- MiniNAM.py | | |-- paping | | |-- README.md | |-- NAT | | |-- badNAT.py | | |-- conf.config | | |-- goodNAT.py | | |-- MiniNAM.py | | |-- README.md | |-- Routing | |-- MiniNAM.py | |-- README.md | |-- simple_switch_13.py | |-- simple_switch_stp_13.py | |-- spanning_tree.py |-- LICENSE |-- MiniNAM.py |-- README.md mininet@mininet-vm:~/MiniNAM$ sudo python MiniNAM.py
MiniNAM | h1 ping -c2 h2 27 / 61
OpenFlow Tutorial 28 / 61
sudo mn --topo single,3 --mac --switch ovsk --controller remote 29 / 61
sudo python ~/MiniNAM/MiniNAM.py ... | controller & wireshark issues 30 / 61
31 / 61 Manual Flow Entry mininet@mininet-vm:~$ sudo ovs-ofctl dump-flows s1 NXST_FLOW reply (xid=0x4): mininet> h1 ping -c3 h2 PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data. From 10.0.0.1 icmp_seq=1 Destination Host Unreachable ... mininet@mininet-vm:~$ sudo ovs-ofctl add-flow s1 in_port=1,actions=output:2 mininet@mininet-vm:~$ sudo ovs-ofctl add-flow s1 in_port=2,actions=output:1 mininet@mininet-vm:~$ sudo ovs-ofctl dump-flows s1 NXST_FLOW reply (xid=0x4): cookie=0x0, duration=25.666s, table=0, n_packets=0, n_bytes=0, idle_age=25, in_port=1 actions=o cookie=0x0, duration=11.374s, table=0, n_packets=0, n_bytes=0, idle_age=11, in_port=2 actions=o mininet> h1 ping -c3 h2 PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data. 64 bytes from 10.0.0.2: icmp_seq=1 ttl=64 time=0.979 ms ... 3 packets transmitted, 3 received, 0% packet loss, time 2003ms rtt min/avg/max/mdev = 0.099/0.402/0.979/0.408 ms
sudo wireshark & 32 / 61
Capture Interfaces - Loopback 33 / 61
34 / 61 Starting Controller OF Reference Controller $ controller ptcp: & # Issue: controller must first be run, before mininet # Could be an issue related with the image $ controller ptcp: & $ sudo mn --topo single,3 --mac --switch ovsk --controller remote # clean up arp mininet> h1 ip -s -s neigh flush all mininet> h2 ip -s -s neigh flush all # in case, there's still flow entries mininet@mininet-vm:~$ sudo ovs-ofctl del-flows s1 mininet> h1 ping -c1 h2
Filter - of 35 / 61
Inspect Packet 36 / 61
Inspect Packet 37 / 61
of and not (of10.echo_request.type or of10.echo_reply.type) 38 / 61
OF Packets Captured After : h1 ping -c1 h2 39 / 61
40 / 61 h1 ping -c1 h2
41 / 61 Flow Entries mininet> dpctl dump-flows mininet@mininet-vm:~$ sudo ovs-ofctl dump-flows s1 NXST_FLOW reply (xid=0x4): cookie=0x0, duration=25.373s, table=0, n_packets=1, n_bytes=42, idle_timeout=60, idle_age=25, p cookie=0x0, duration=30.373s, table=0, n_packets=1, n_bytes=42, idle_timeout=60, idle_age=30, p cookie=0x0, duration=25.374s, table=0, n_packets=1, n_bytes=42, idle_timeout=60, idle_age=25, p cookie=0x0, duration=30.371s, table=0, n_packets=1, n_bytes=98, idle_timeout=60, idle_age=30, p cookie=0x0, duration=30.37s, table=0, n_packets=1, n_bytes=98, idle_timeout=60, idle_age=30, pr mininet@mininet-vm:~$ sudo ovs-ofctl dump-flows s1 NXST_FLOW reply (xid=0x4):
42 / 61 Benchmark kernel- vs. user- space mininet> iperf +++ Iperf: testing TCP bandwidth between h1 and h3 +++ Results: ['27.5 Gbits/sec', '27.6 Gbits/sec'] mininet> exit mininet@mininet-vm:~$ sudo mn --topo single,3 --controller remote --switch user mininet> iperf +++ Iperf: testing TCP bandwidth between h1 and h3 +++ Results: ['658 Mbits/sec', '659 Mbits/sec'] # Notes user-space: mininet> sh ovs-ofctl dump-flows s1 ovs-ofctl: s1 is not a bridge or a socket
Notes My personal notes with previous versions of Mininet. Some are not tested yet with the current version. 43 / 61
44 / 61 Notes mininet> xterm h1 h2 h3 h1# tcpdump -ne -i h1-eth0 mininet>1 h1 ping -c1 h2 mininet>1 h1 arp -na # deprecated?? $ sudo ovs-controller --verbose ptcp:& # $ sudo controller ptcp:& # $ sudo ovs-controller --hub ptcp:& # --noflow --normal --verbose $ sudo ovs-controller --hub --verbose ptcp:& $ sudo ovs-controller --noflow --verbose ptcp:&
45 / 61 Notes # IP-Source-Address-Based Rule --> may need Reset $ sudo ovs-ofctl del-flows s1 $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,dl_type=0x0800,nw_src=10.0.0.1,acti $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,dl_type=0x0800,nw_src=10.0.0.2,acti # IP-Dest-Address-Based Rule --> may need Reset $ sudo ovs-ofctl del-flows s1 $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,ip,nw_dst=10.0.0.3,actions=output:3 $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,ip,nw_dst=10.0.0.2,actions=output:2 $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,ip,nw_dst=10.0.0.1,actions=output:1 $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,arp,actions=NORMAL # Alternatives $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,dl_type=0x0806,actions=FLOOD $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,dl_type=0x0806,actions=ALL $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,dl_type=0x0800,nw_proto=1,actions=N $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,icmp,nw_dst=10.0.0.2,actions=output # NORMAL sends packet to non-openflow function of switch - not all switch # sudo ovs-ofctl del-flows s1 in_port=1 # sudo ovs-ofctl del-flows s1 dl_type=0x0800
46 / 61 Notes
47 / 61 Notes
POX Controller 48 / 61
49 / 61 POXController POX is a Python-based SDN controller platform geared towards research and education. POX provides a framework for communicating with SDN switches using either the OpenFlow or OVSDB protocol. Developers can use POX to create an SDN controller using the Python programming language. Ref: [brianlinkletter ]
50 / 61 POX Controller Files mininet@mininet-vm:~/pox/pox/misc$ ll total 76 drwxrwxr-x 3 mininet mininet 4096 Mar 21 2017 ./ drwxrwxr-x 15 mininet mininet 4096 Mar 21 2017 ../ -rw-rw-r-- 1 mininet mininet 689 Mar 21 2017 __init__.py -rw-rw-r-- 1 mininet mininet 1240 Mar 21 2017 cbench.py -rw-rw-r-- 1 mininet mininet 1079 Mar 21 2017 full_payload.py -rw-rw-r-- 1 mininet mininet 5214 Mar 21 2017 gephi_topo.py -rw-rw-r-- 1 mininet mininet 10251 Mar 21 2017 ip_loadbalancer.py -rw-rw-r-- 1 mininet mininet 3794 Mar 21 2017 mac_blocker.py -rw-rw-r-- 1 mininet mininet 14375 Mar 21 2017 nat.py -rw-rw-r-- 1 mininet mininet 4582 Mar 21 2017 of_tutorial.py -rw-rw-r-- 1 mininet mininet 2096 Mar 21 2017 pidfile.py drwxrwxr-x 2 mininet mininet 4096 Mar 21 2017 telnetd/ mininet@mininet-vm:~/pox/pox/forwarding$ ll total 96 drwxrwxr-x 2 mininet mininet 4096 Mar 21 2017 ./ drwxrwxr-x 15 mininet mininet 4096 Mar 21 2017 ../ -rw-rw-r-- 1 mininet mininet 651 Mar 21 2017 __init__.py -rw-rw-r-- 1 mininet mininet 1092 Mar 21 2017 hub.py -rw-rw-r-- 1 mininet mininet 4426 Mar 21 2017 l2_flowvisor.py -rw-rw-r-- 1 mininet mininet 6692 Mar 21 2017 l2_learning.py -rw-rw-r-- 1 mininet mininet 15558 Mar 21 2017 l2_multi.py -rw-rw-r-- 1 mininet mininet 4324 Mar 21 2017 l2_nx.py -rw-rw-r-- 1 mininet mininet 2105 Mar 21 2017 l2_nx_self_learning.py -rw-rw-r-- 1 mininet mininet 2882 Mar 21 2017 l2_pairs.py -rw-rw-r-- 1 mininet mininet 12330 Mar 21 2017 l3_learning.py -rw-rw-r-- 1 mininet mininet 14102 Mar 21 2017 topo_proactive.py
from pox.core import core import pox.openflow.libopenflow_01 as of log = core.getLogger() #============ class Tutorial (object): #------------------------------- def __init__ (self, connection): self.connection = connection connection.addListeners(self) self.mac_to_port = {} #------------------------------- def resend_packet (self, packet_in, out_port): msg = of.ofp_packet_out() msg.data = packet_in action = of.ofp_action_output(port = out_port) msg.actions.append(action) self.connection.send(msg) #------------------------------- def act_like_hub (self, packet, packet_in): self.resend_packet(packet_in, of.OFPP_ALL) #------------------------------- def act_like_switch (self, packet, packet_in): #------------------------------- def _handle_PacketIn (self, event): packet = event.parsed # This is the parsed packet data. if not packet.parsed: log.warning("Ignoring incomplete packet") return packet_in = event.ofp # The actual ofp_packet_in message. self.act_like_hub(packet, packet_in) #self.act_like_switch(packet, packet_in) #============ def launch (): def start_switch (event): log.debug("Controlling %s" % (event.connection,)) Tutorial(event.connection) core.openflow.addListenerByName("ConnectionUp", start_switch) 51 / 61 of_tutorial.py
52 / 61 POX Controller Hub Behavior mininet@mininet-vm:~/pox$ ./pox.py log.level --DEBUG misc.of_tutorial POX 0.2.0 (carp) / Copyright 2011-2013 James McCauley, et al. DEBUG:core:POX 0.2.0 (carp) going up... DEBUG:core:Running on CPython (2.7.6/Oct 26 2016 20:30:19) DEBUG:core:Platform is Linux-4.2.0-27-generic-x86_64-with-Ubuntu-14.04-trusty INFO:core:POX 0.2.0 (carp) is up. DEBUG:openflow.of_01:Listening on 0.0.0.0:6633 INFO:openflow.of_01:[None 1] closed INFO:openflow.of_01:[00-00-00-00-00-01 2] connected DEBUG:misc.of_tutorial:Controlling [00-00-00-00-00-01 2] $ sudo mn --topo single,3 --mac --switch ovsk --controller remote mininet> xterm h1 h2 h3 h1# tcpdump -XX -n -i h1-eth0 > h1.txt & h2# tcpdump -XX -n -i h2-eth0 > h2.txt h3# tcpdump -XX -n -i h3-eth0 > h3.txt h1# ping -c1 10.0.0.2
53 / 61 POX Controller Hub Behavior mininet@mininet-vm:~$ cat h1.txt 16:33:33.273970 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 28 16:33:33.305723 ARP, Reply 10.0.0.2 is-at 00:00:00:00:00:02, length 28 16:33:33.305730 IP 10.0.0.1 > 10.0.0.2: ICMP echo request, id 4108, seq 1, length 64 16:33:33.306899 IP 10.0.0.2 > 10.0.0.1: ICMP echo reply, id 4108, seq 1, length 64 16:33:38.356385 ARP, Request who-has 10.0.0.1 tell 10.0.0.2, length 28 16:33:38.356425 ARP, Reply 10.0.0.1 is-at 00:00:00:00:00:01, length 28 mininet@mininet-vm:~$ cat h2.txt 16:33:33.305056 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 28 16:33:33.305079 ARP, Reply 10.0.0.2 is-at 00:00:00:00:00:02, length 28 16:33:33.306329 IP 10.0.0.1 > 10.0.0.2: ICMP echo request, id 4108, seq 1, length 64 16:33:33.306344 IP 10.0.0.2 > 10.0.0.1: ICMP echo reply, id 4108, seq 1, length 64 16:33:38.317451 ARP, Request who-has 10.0.0.1 tell 10.0.0.2, length 28 16:33:38.359253 ARP, Reply 10.0.0.1 is-at 00:00:00:00:00:01, length 28 mininet@mininet-vm:~$ cat h3.txt 16:33:33.305054 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 28 16:33:33.305722 ARP, Reply 10.0.0.2 is-at 00:00:00:00:00:02, length 28 16:33:33.306328 IP 10.0.0.1 > 10.0.0.2: ICMP echo request, id 4108, seq 1, length 64 16:33:33.306898 IP 10.0.0.2 > 10.0.0.1: ICMP echo reply, id 4108, seq 1, length 64 16:33:38.356378 ARP, Request who-has 10.0.0.1 tell 10.0.0.2, length 28 16:33:38.359247 ARP, Reply 10.0.0.1 is-at 00:00:00:00:00:01, length 28
54 / 61 POX Controller Hub Behavior h1# ping -c1 10.0.0.5 mininet@mininet-vm:~$ cat h1.txt 16:45:33.285777 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:34.285666 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:35.285632 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 mininet@mininet-vm:~$ cat h3.txt 16:45:33.335877 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:34.310252 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:35.287537 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 mininet@mininet-vm:~$ cat h2.txt 16:45:33.335881 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:34.310257 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:35.287542 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28
Packets Captured After : h1 ping -c1 10.0.0.2 55 / 61
Packets Captured After : h1 ping -c1 10.0.0.5 56 / 61
57 / 61 POX Controller Hub Behavior mininet> sh ovs-ofctl dump-flows s1 NXST_FLOW reply (xid=0x4): mininet> pingpair h1 -> h2 h2 -> h1 +++ Results: 0% dropped (2/2 received) mininet> pingall +++ Ping: testing ping reachability h1 -> h2 h3 h2 -> h1 h3 h3 -> h1 h2 +++ Results: 0% dropped (6/6 received) mininet> iperf +++ Iperf: testing TCP bandwidth between h1 and h3 +++ Results: ['19.0 Mbits/sec', '20.3 Mbits/sec'] mininet@mininet-vm:~$ sudo python MiniNAM/MiniNAM.py --topo single,3 --mac --switch ovsk --contr
def act_like_switch (self, packet, packet_in): self.mac_to_port[packet.src] = packet_in.in_port if packet.dst in self.mac_to_port: print("Packet sent to Control Plane") self.resend_packet(packet_in, self.mac_to_port[packet.dst]) # log.debug("Installing flow...") msg = of.ofp_flow_mod() msg.match.dl_dst = packet.dst # msg.match = of.ofp_match.from_packet(packet) msg.actions.append(of.ofp_action_output(port=self.mac_to_port[packet.dst])) self.connection.send(msg) else: self.resend_packet(packet_in, of.OFPP_ALL) 58 / 61 of_tutorial.py
Refs/Resources 59 / 61
Refs/Resources 1. Learn Development Tools - mininet/open ow-tutorial Wiki 2. Create a Learning Switch - mininet/open ow-tutorial Wiki 3. MININET - Open Networking Foundation 4. MiniNAM | University College Cork 5. uccmisl/MiniNAM: A Network Animator for Visualizing Real-Time Packet Flows in Mininet 6. FAQ - mininet/mininet Wiki 7. Learn Development Tools - mininet/open ow-tutorial Wiki 8. Create a Learning Switch - mininet/open ow-tutorial Wiki 60 / 61
61 / 61 ENDEueung Mulyana https://telematika.org/remark/mininet CodeLabs | Attribution-ShareAlike CC BY-SA

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Mininet Basics

  • 1. 1 / 61 EL-5244 MininetBasics Eueung Mulyana https://telematika.org/remark/mininet CodeLabs | Attribution-ShareAlike CC BY-SA
  • 3. Mininet 2.2.2 on Ubuntu 14.04 LTS - 64 bit, o cial VM | POX 0.2.0 (carp) | OVS (Open vSwitch) 2.0.2 VirtualBox 5.2.6 on Ubuntu Xenial 16.04.3. Ref: [Mininet VM Images] 3 / 61
  • 5. Mininet provides a virtual test bed and development environment for SDN 5 / 61
  • 6. 6 / 61 Mininet enables Rapid prototyping of software-de ned networks Complex topology testing without the need to wire up a physical network Multiple concurrent developers to work independently on the same topology
  • 7. 7 / 61 Mininet networks run real code including standard Unix/Linux network applications as well as the real Linux kernel and network stack. Mininet provides an extensible Python API for network creation and experimentations. Ref: MININET - Open Networking Foundation
  • 9. 9 / 61 Mininet Setup Using Pre-Made VM Download a Mininet VM Image Import the Image (eg. into VirtualBox) Con gure Access (eg. port forwarding or host-only networking) Run the VM Access via SSH with Remote Display Forwarding Enabled Note: in the o cial Mininet VM image version 2.2.2, there is possibly a con guration bug if you're using VirtualBox. See comments by isams1 in this thread. So don't use host-only networking to access the VM.
  • 13. Con gure Access - Port Forwarding 13 / 61
  • 14. Con gure Access - Port Forwarding 14 / 61
  • 15. Run the VM 15 / 61
  • 16. Access via SSH 16 / 61
  • 17. Test 17 / 61
  • 18. Test - Wireshark 18 / 61
  • 19. 19 / 61 Check $ ssh -Y -l mininet -p 2222 localhost mininet@mininet-vm:~$ sudo cp /etc/apt/sources.list /etc/apt/sources.list.ori mininet@mininet-vm:~$ sudo sed -i 's/http://us.archive.ubuntu.com/ubuntu//http://kambing.u mininet@mininet-vm:~$ sudo apt-get update mininet@mininet-vm:~$ sudo apt-get install tree mininet@mininet-vm:~$ tree -L 1 . |-- install-mininet-vm.sh |-- loxigen |-- mininet |-- oflops |-- oftest |-- openflow |-- pox
  • 20. 20 / 61 Check mininet@mininet-vm:~/mininet$ tree -L 2 -d . |-- bin |-- build | |-- bdist.linux-x86_64 | |-- lib.linux-x86_64-2.7 | |-- scripts-2.7 |-- custom |-- debian | |-- source |-- dist |-- doc |-- examples | |-- test |-- mininet | |-- examples -> ../examples | |-- test |-- mininet.egg-info |-- util |-- kbuild |-- nox-patches |-- openflow-patches |-- sch_htb-ofbuf |-- vm
  • 21. mininet@mininet-vm:~/mininet/examples$ ll total 364 drwxrwxr-x 3 mininet mininet 4096 Mar 21 2017 ./ drwxrwxr-x 13 mininet mininet 4096 Mar 21 2017 ../ -rw-rw-r-- 1 mininet mininet 4965 Mar 21 2017 README.md -rw-rw-r-- 1 mininet mininet 48 Mar 21 2017 __init__.py -rwxrwxr-x 1 mininet mininet 1074 Mar 21 2017 baresshd.py* -rwxrwxr-x 1 mininet mininet 2310 Mar 21 2017 bind.py* -rwxrwxr-x 1 mininet mininet 33427 Mar 21 2017 cluster.py* -rwxrwxr-x 1 mininet mininet 501 Mar 21 2017 clusterSanity.py* -rw-rw-r-- 1 mininet mininet 3875 Mar 21 2017 clustercli.py -rwxrwxr-x 1 mininet mininet 639 Mar 21 2017 clusterdemo.py* -rwxrwxr-x 1 mininet mininet 15612 Mar 21 2017 consoles.py* -rwxrwxr-x 1 mininet mininet 1061 Mar 21 2017 controllers.py* -rwxrwxr-x 1 mininet mininet 1612 Mar 21 2017 controllers2.py* -rwxrwxr-x 1 mininet mininet 4967 Mar 21 2017 controlnet.py* -rwxrwxr-x 1 mininet mininet 3725 Mar 21 2017 cpu.py* -rwxrwxr-x 1 mininet mininet 960 Mar 21 2017 emptynet.py* -rwxrwxr-x 1 mininet mininet 1549 Mar 21 2017 hwintf.py* -rwxrwxr-x 1 mininet mininet 1320 Mar 21 2017 intfoptions.py* -rwxrwxr-x 1 mininet mininet 2034 Mar 21 2017 limit.py* -rwxrwxr-x 1 mininet mininet 4062 Mar 21 2017 linearbandwidth.py* -rwxrwxr-x 1 mininet mininet 2826 Mar 21 2017 linuxrouter.py* -rwxrwxr-x 1 mininet mininet 154479 Mar 21 2017 miniedit.py* -rwxrwxr-x 1 mininet mininet 4198 Mar 21 2017 mobility.py* -rwxrwxr-x 1 mininet mininet 834 Mar 21 2017 multilink.py* -rwxrwxr-x 1 mininet mininet 2235 Mar 21 2017 multiping.py* -rwxrwxr-x 1 mininet mininet 2469 Mar 21 2017 multipoll.py* -rwxrwxr-x 1 mininet mininet 1049 Mar 21 2017 multitest.py* -rwxrwxr-x 1 mininet mininet 550 Mar 21 2017 nat.py* -rwxrwxr-x 1 mininet mininet 1948 Mar 21 2017 natnet.py* -rwxrwxr-x 1 mininet mininet 2330 Mar 21 2017 numberedports.py* -rwxrwxr-x 1 mininet mininet 1023 Mar 21 2017 popen.py* -rwxrwxr-x 1 mininet mininet 932 Mar 21 2017 popenpoll.py* -rwxrwxr-x 1 mininet mininet 2032 Mar 21 2017 scratchnet.py* -rwxrwxr-x 1 mininet mininet 2455 Mar 21 2017 scratchnetuser.py* -rwxrwxr-x 1 mininet mininet 1888 Mar 21 2017 simpleperf.py* -rwxrwxr-x 1 mininet mininet 3040 Mar 21 2017 sshd.py* drwxrwxr-x 2 mininet mininet 4096 Mar 21 2017 test/ -rwxrwxr-x 1 mininet mininet 522 Mar 21 2017 tree1024.py* -rwxrwxr-x 1 mininet mininet 950 Mar 21 2017 treeping64.py* -rwxrwxr-x 1 mininet mininet 3679 Mar 21 2017 vlanhost.py* 21 / 61 Check
  • 22. 22 / 61 Notes Mininet Walkthrough $ sudo mn [--topo=minimal] $ sudo mn --test pingpair $ sudo mn --test iperf $ sudo mn --link tc,bw=10,delay=10ms $ sudo mn --test pingall --topo single,3 $ sudo mn --test pingall --topo mytopo --custom ~/mininet/custom/topo-2sw-2host.py $ sudo mn --mac mininet> h1 ping -c10 h2 mininet> pingall mininet> h1 python -m SimpleHTTPServer 80 & mininet> h2 wget -O - h1 mininet> iperf mininet> link s1 h1 down mininet> link s1 h1 up $ sudo ~/mininet/examples/sshd.py Ref: Mininet Walkthrough - Mininet
  • 23. 23 / 61 Notes Mininet Sample Work ow # Creating a Network $ sudo mn --switch ovs --controller ref --topo tree,depth=2,fanout=8 --test pingall # Interacting with a Network mininet> h2 ping h3 mininet> h2 python -m SimpleHTTPServer 80 >& /tmp/http.log & mininet> h3 wget -O - h2 # Customizing a Network from mininet.net import Mininet from mininet.topolib import TreeTopo tree4 = TreeTopo(depth=2,fanout=2) net = Mininet(topo=tree4) net.start() h1, h4 = net.hosts[0], net.hosts[3] print h1.cmd('ping -c1 %s' % h4.IP()) net.stop() Ref: Mininet Sample Work ow - Mininet
  • 25. 25 / 61 MiniNAM A utility that provides real-time animation of any network created by the Mininet emulator. MiniNAM includes all the components required to initiate, visualize and modify Mininet network ows in real-time. MiniNAM provides a graphical user interface that allows dynamic modi cation of preferences and packet lters: a user can view selective ows with options to color code packets based on packet type and/or nodes (hosts). Ref: MiniNAM | University College Cork
  • 26. 26 / 61 Setup $ ssh -Y -l mininet -p 2222 localhost $ sudo apt-get install git python-imaging python-imaging-tk $ git clone https://github.com/uccmisl/MiniNAM.git mininet@mininet-vm:~/MiniNAM$ tree . |-- conf.config |-- Examples | |-- LoadBalancer | | |-- install.sh | | |-- MiniNAM.py | | |-- paping | | |-- README.md | |-- NAT | | |-- badNAT.py | | |-- conf.config | | |-- goodNAT.py | | |-- MiniNAM.py | | |-- README.md | |-- Routing | |-- MiniNAM.py | |-- README.md | |-- simple_switch_13.py | |-- simple_switch_stp_13.py | |-- spanning_tree.py |-- LICENSE |-- MiniNAM.py |-- README.md mininet@mininet-vm:~/MiniNAM$ sudo python MiniNAM.py
  • 27. MiniNAM | h1 ping -c2 h2 27 / 61
  • 29. sudo mn --topo single,3 --mac --switch ovsk --controller remote 29 / 61
  • 30. sudo python ~/MiniNAM/MiniNAM.py ... | controller & wireshark issues 30 / 61
  • 31. 31 / 61 Manual Flow Entry mininet@mininet-vm:~$ sudo ovs-ofctl dump-flows s1 NXST_FLOW reply (xid=0x4): mininet> h1 ping -c3 h2 PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data. From 10.0.0.1 icmp_seq=1 Destination Host Unreachable ... mininet@mininet-vm:~$ sudo ovs-ofctl add-flow s1 in_port=1,actions=output:2 mininet@mininet-vm:~$ sudo ovs-ofctl add-flow s1 in_port=2,actions=output:1 mininet@mininet-vm:~$ sudo ovs-ofctl dump-flows s1 NXST_FLOW reply (xid=0x4): cookie=0x0, duration=25.666s, table=0, n_packets=0, n_bytes=0, idle_age=25, in_port=1 actions=o cookie=0x0, duration=11.374s, table=0, n_packets=0, n_bytes=0, idle_age=11, in_port=2 actions=o mininet> h1 ping -c3 h2 PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data. 64 bytes from 10.0.0.2: icmp_seq=1 ttl=64 time=0.979 ms ... 3 packets transmitted, 3 received, 0% packet loss, time 2003ms rtt min/avg/max/mdev = 0.099/0.402/0.979/0.408 ms
  • 32. sudo wireshark & 32 / 61
  • 33. Capture Interfaces - Loopback 33 / 61
  • 34. 34 / 61 Starting Controller OF Reference Controller $ controller ptcp: & # Issue: controller must first be run, before mininet # Could be an issue related with the image $ controller ptcp: & $ sudo mn --topo single,3 --mac --switch ovsk --controller remote # clean up arp mininet> h1 ip -s -s neigh flush all mininet> h2 ip -s -s neigh flush all # in case, there's still flow entries mininet@mininet-vm:~$ sudo ovs-ofctl del-flows s1 mininet> h1 ping -c1 h2
  • 35. Filter - of 35 / 61
  • 38. of and not (of10.echo_request.type or of10.echo_reply.type) 38 / 61
  • 39. OF Packets Captured After : h1 ping -c1 h2 39 / 61
  • 40. 40 / 61 h1 ping -c1 h2
  • 41. 41 / 61 Flow Entries mininet> dpctl dump-flows mininet@mininet-vm:~$ sudo ovs-ofctl dump-flows s1 NXST_FLOW reply (xid=0x4): cookie=0x0, duration=25.373s, table=0, n_packets=1, n_bytes=42, idle_timeout=60, idle_age=25, p cookie=0x0, duration=30.373s, table=0, n_packets=1, n_bytes=42, idle_timeout=60, idle_age=30, p cookie=0x0, duration=25.374s, table=0, n_packets=1, n_bytes=42, idle_timeout=60, idle_age=25, p cookie=0x0, duration=30.371s, table=0, n_packets=1, n_bytes=98, idle_timeout=60, idle_age=30, p cookie=0x0, duration=30.37s, table=0, n_packets=1, n_bytes=98, idle_timeout=60, idle_age=30, pr mininet@mininet-vm:~$ sudo ovs-ofctl dump-flows s1 NXST_FLOW reply (xid=0x4):
  • 42. 42 / 61 Benchmark kernel- vs. user- space mininet> iperf +++ Iperf: testing TCP bandwidth between h1 and h3 +++ Results: ['27.5 Gbits/sec', '27.6 Gbits/sec'] mininet> exit mininet@mininet-vm:~$ sudo mn --topo single,3 --controller remote --switch user mininet> iperf +++ Iperf: testing TCP bandwidth between h1 and h3 +++ Results: ['658 Mbits/sec', '659 Mbits/sec'] # Notes user-space: mininet> sh ovs-ofctl dump-flows s1 ovs-ofctl: s1 is not a bridge or a socket
  • 43. Notes My personal notes with previous versions of Mininet. Some are not tested yet with the current version. 43 / 61
  • 44. 44 / 61 Notes mininet> xterm h1 h2 h3 h1# tcpdump -ne -i h1-eth0 mininet>1 h1 ping -c1 h2 mininet>1 h1 arp -na # deprecated?? $ sudo ovs-controller --verbose ptcp:& # $ sudo controller ptcp:& # $ sudo ovs-controller --hub ptcp:& # --noflow --normal --verbose $ sudo ovs-controller --hub --verbose ptcp:& $ sudo ovs-controller --noflow --verbose ptcp:&
  • 45. 45 / 61 Notes # IP-Source-Address-Based Rule --> may need Reset $ sudo ovs-ofctl del-flows s1 $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,dl_type=0x0800,nw_src=10.0.0.1,acti $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,dl_type=0x0800,nw_src=10.0.0.2,acti # IP-Dest-Address-Based Rule --> may need Reset $ sudo ovs-ofctl del-flows s1 $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,ip,nw_dst=10.0.0.3,actions=output:3 $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,ip,nw_dst=10.0.0.2,actions=output:2 $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,ip,nw_dst=10.0.0.1,actions=output:1 $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,arp,actions=NORMAL # Alternatives $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,dl_type=0x0806,actions=FLOOD $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,dl_type=0x0806,actions=ALL $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,dl_type=0x0800,nw_proto=1,actions=N $ sudo ovs-ofctl add-flow s1 idle_timeout=600,priority=33001,icmp,nw_dst=10.0.0.2,actions=output # NORMAL sends packet to non-openflow function of switch - not all switch # sudo ovs-ofctl del-flows s1 in_port=1 # sudo ovs-ofctl del-flows s1 dl_type=0x0800
  • 49. 49 / 61 POXController POX is a Python-based SDN controller platform geared towards research and education. POX provides a framework for communicating with SDN switches using either the OpenFlow or OVSDB protocol. Developers can use POX to create an SDN controller using the Python programming language. Ref: [brianlinkletter ]
  • 50. 50 / 61 POX Controller Files mininet@mininet-vm:~/pox/pox/misc$ ll total 76 drwxrwxr-x 3 mininet mininet 4096 Mar 21 2017 ./ drwxrwxr-x 15 mininet mininet 4096 Mar 21 2017 ../ -rw-rw-r-- 1 mininet mininet 689 Mar 21 2017 __init__.py -rw-rw-r-- 1 mininet mininet 1240 Mar 21 2017 cbench.py -rw-rw-r-- 1 mininet mininet 1079 Mar 21 2017 full_payload.py -rw-rw-r-- 1 mininet mininet 5214 Mar 21 2017 gephi_topo.py -rw-rw-r-- 1 mininet mininet 10251 Mar 21 2017 ip_loadbalancer.py -rw-rw-r-- 1 mininet mininet 3794 Mar 21 2017 mac_blocker.py -rw-rw-r-- 1 mininet mininet 14375 Mar 21 2017 nat.py -rw-rw-r-- 1 mininet mininet 4582 Mar 21 2017 of_tutorial.py -rw-rw-r-- 1 mininet mininet 2096 Mar 21 2017 pidfile.py drwxrwxr-x 2 mininet mininet 4096 Mar 21 2017 telnetd/ mininet@mininet-vm:~/pox/pox/forwarding$ ll total 96 drwxrwxr-x 2 mininet mininet 4096 Mar 21 2017 ./ drwxrwxr-x 15 mininet mininet 4096 Mar 21 2017 ../ -rw-rw-r-- 1 mininet mininet 651 Mar 21 2017 __init__.py -rw-rw-r-- 1 mininet mininet 1092 Mar 21 2017 hub.py -rw-rw-r-- 1 mininet mininet 4426 Mar 21 2017 l2_flowvisor.py -rw-rw-r-- 1 mininet mininet 6692 Mar 21 2017 l2_learning.py -rw-rw-r-- 1 mininet mininet 15558 Mar 21 2017 l2_multi.py -rw-rw-r-- 1 mininet mininet 4324 Mar 21 2017 l2_nx.py -rw-rw-r-- 1 mininet mininet 2105 Mar 21 2017 l2_nx_self_learning.py -rw-rw-r-- 1 mininet mininet 2882 Mar 21 2017 l2_pairs.py -rw-rw-r-- 1 mininet mininet 12330 Mar 21 2017 l3_learning.py -rw-rw-r-- 1 mininet mininet 14102 Mar 21 2017 topo_proactive.py
  • 51. from pox.core import core import pox.openflow.libopenflow_01 as of log = core.getLogger() #============ class Tutorial (object): #------------------------------- def __init__ (self, connection): self.connection = connection connection.addListeners(self) self.mac_to_port = {} #------------------------------- def resend_packet (self, packet_in, out_port): msg = of.ofp_packet_out() msg.data = packet_in action = of.ofp_action_output(port = out_port) msg.actions.append(action) self.connection.send(msg) #------------------------------- def act_like_hub (self, packet, packet_in): self.resend_packet(packet_in, of.OFPP_ALL) #------------------------------- def act_like_switch (self, packet, packet_in): #------------------------------- def _handle_PacketIn (self, event): packet = event.parsed # This is the parsed packet data. if not packet.parsed: log.warning("Ignoring incomplete packet") return packet_in = event.ofp # The actual ofp_packet_in message. self.act_like_hub(packet, packet_in) #self.act_like_switch(packet, packet_in) #============ def launch (): def start_switch (event): log.debug("Controlling %s" % (event.connection,)) Tutorial(event.connection) core.openflow.addListenerByName("ConnectionUp", start_switch) 51 / 61 of_tutorial.py
  • 52. 52 / 61 POX Controller Hub Behavior mininet@mininet-vm:~/pox$ ./pox.py log.level --DEBUG misc.of_tutorial POX 0.2.0 (carp) / Copyright 2011-2013 James McCauley, et al. DEBUG:core:POX 0.2.0 (carp) going up... DEBUG:core:Running on CPython (2.7.6/Oct 26 2016 20:30:19) DEBUG:core:Platform is Linux-4.2.0-27-generic-x86_64-with-Ubuntu-14.04-trusty INFO:core:POX 0.2.0 (carp) is up. DEBUG:openflow.of_01:Listening on 0.0.0.0:6633 INFO:openflow.of_01:[None 1] closed INFO:openflow.of_01:[00-00-00-00-00-01 2] connected DEBUG:misc.of_tutorial:Controlling [00-00-00-00-00-01 2] $ sudo mn --topo single,3 --mac --switch ovsk --controller remote mininet> xterm h1 h2 h3 h1# tcpdump -XX -n -i h1-eth0 > h1.txt & h2# tcpdump -XX -n -i h2-eth0 > h2.txt h3# tcpdump -XX -n -i h3-eth0 > h3.txt h1# ping -c1 10.0.0.2
  • 53. 53 / 61 POX Controller Hub Behavior mininet@mininet-vm:~$ cat h1.txt 16:33:33.273970 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 28 16:33:33.305723 ARP, Reply 10.0.0.2 is-at 00:00:00:00:00:02, length 28 16:33:33.305730 IP 10.0.0.1 > 10.0.0.2: ICMP echo request, id 4108, seq 1, length 64 16:33:33.306899 IP 10.0.0.2 > 10.0.0.1: ICMP echo reply, id 4108, seq 1, length 64 16:33:38.356385 ARP, Request who-has 10.0.0.1 tell 10.0.0.2, length 28 16:33:38.356425 ARP, Reply 10.0.0.1 is-at 00:00:00:00:00:01, length 28 mininet@mininet-vm:~$ cat h2.txt 16:33:33.305056 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 28 16:33:33.305079 ARP, Reply 10.0.0.2 is-at 00:00:00:00:00:02, length 28 16:33:33.306329 IP 10.0.0.1 > 10.0.0.2: ICMP echo request, id 4108, seq 1, length 64 16:33:33.306344 IP 10.0.0.2 > 10.0.0.1: ICMP echo reply, id 4108, seq 1, length 64 16:33:38.317451 ARP, Request who-has 10.0.0.1 tell 10.0.0.2, length 28 16:33:38.359253 ARP, Reply 10.0.0.1 is-at 00:00:00:00:00:01, length 28 mininet@mininet-vm:~$ cat h3.txt 16:33:33.305054 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 28 16:33:33.305722 ARP, Reply 10.0.0.2 is-at 00:00:00:00:00:02, length 28 16:33:33.306328 IP 10.0.0.1 > 10.0.0.2: ICMP echo request, id 4108, seq 1, length 64 16:33:33.306898 IP 10.0.0.2 > 10.0.0.1: ICMP echo reply, id 4108, seq 1, length 64 16:33:38.356378 ARP, Request who-has 10.0.0.1 tell 10.0.0.2, length 28 16:33:38.359247 ARP, Reply 10.0.0.1 is-at 00:00:00:00:00:01, length 28
  • 54. 54 / 61 POX Controller Hub Behavior h1# ping -c1 10.0.0.5 mininet@mininet-vm:~$ cat h1.txt 16:45:33.285777 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:34.285666 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:35.285632 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 mininet@mininet-vm:~$ cat h3.txt 16:45:33.335877 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:34.310252 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:35.287537 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 mininet@mininet-vm:~$ cat h2.txt 16:45:33.335881 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:34.310257 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28 16:45:35.287542 ARP, Request who-has 10.0.0.5 tell 10.0.0.1, length 28
  • 55. Packets Captured After : h1 ping -c1 10.0.0.2 55 / 61
  • 56. Packets Captured After : h1 ping -c1 10.0.0.5 56 / 61
  • 57. 57 / 61 POX Controller Hub Behavior mininet> sh ovs-ofctl dump-flows s1 NXST_FLOW reply (xid=0x4): mininet> pingpair h1 -> h2 h2 -> h1 +++ Results: 0% dropped (2/2 received) mininet> pingall +++ Ping: testing ping reachability h1 -> h2 h3 h2 -> h1 h3 h3 -> h1 h2 +++ Results: 0% dropped (6/6 received) mininet> iperf +++ Iperf: testing TCP bandwidth between h1 and h3 +++ Results: ['19.0 Mbits/sec', '20.3 Mbits/sec'] mininet@mininet-vm:~$ sudo python MiniNAM/MiniNAM.py --topo single,3 --mac --switch ovsk --contr
  • 58. def act_like_switch (self, packet, packet_in): self.mac_to_port[packet.src] = packet_in.in_port if packet.dst in self.mac_to_port: print("Packet sent to Control Plane") self.resend_packet(packet_in, self.mac_to_port[packet.dst]) # log.debug("Installing flow...") msg = of.ofp_flow_mod() msg.match.dl_dst = packet.dst # msg.match = of.ofp_match.from_packet(packet) msg.actions.append(of.ofp_action_output(port=self.mac_to_port[packet.dst])) self.connection.send(msg) else: self.resend_packet(packet_in, of.OFPP_ALL) 58 / 61 of_tutorial.py
  • 60. Refs/Resources 1. Learn Development Tools - mininet/open ow-tutorial Wiki 2. Create a Learning Switch - mininet/open ow-tutorial Wiki 3. MININET - Open Networking Foundation 4. MiniNAM | University College Cork 5. uccmisl/MiniNAM: A Network Animator for Visualizing Real-Time Packet Flows in Mininet 6. FAQ - mininet/mininet Wiki 7. Learn Development Tools - mininet/open ow-tutorial Wiki 8. Create a Learning Switch - mininet/open ow-tutorial Wiki 60 / 61
  • 61. 61 / 61 ENDEueung Mulyana https://telematika.org/remark/mininet CodeLabs | Attribution-ShareAlike CC BY-SA