Network Simulator with Mobile IP

1. Network Simulator with Mobile IP 2003 Huang – Yu Liu

2. Overview • Introduction • Install • Simulation • Simulation for Mobile IP

3. 安裝 Linux • 深入Linux 建構與管理 第三版 楊文誌 著, 旗標出版社 • http://linux.vbird.org/linux_basic/0150installredhat.php

4. Network Simulator • A Collaboration between researchers at UC Berkeley, USC/ISI, and Xerox PARC全錄帕洛奧圖研究中心. • The simulator is written in C++; it uses OTcl as a command and configuration interface.

5. Network Simulator • Tcl - Tool Command Language • OTcl – Object Tcl • http://bmrc.berkeley.edu/research/cmt/cmtdoc/otcl/ • http://bmrc.berkeley.edu/research/cmt/cmtdoc/otcl/tutorial.html

6. Network Simulator • ns-2.1b10[OLD VERSION NO] / ns-2.26[NEW VERSION NO] Released on Wed Feb 26 11:40:51 PST 2003 • ns-2.1b8[OLD] / ns-2.24[NEW] released on Wed June 06 11:05:52 PDT 2001

11. Network Simulator • Install ns : Get file ns-allinone-2.26.tar.gz • 輸入 tar zxvf ns-allinone-2.26.tar.gz p.s 假設在根目錄下輸入此指令

13. Network Simulator • 進入 ns-allinone-2.26 資料夾 • 執行 ./install

18. Network Simulator • 安裝完成後, 設定環境變數. • 把 /ns-allinone-2.26/bin:/root/ns-allinone-2.26/tcl8.3.2/unix:/ns-allinone-2.26/tk8.3.2/unix放到你的PATH環境變數. • 把 /ns-allinone-2.26/otcl-1.0a8, /ns-allinone-2.26/lib, 放到你的LD_LIBRARY_PATH環境變數. • 把 /ns-allinone-2.26/tcl8.3.2/library放到你的TCL_LIBRARY環境變數.

19. Network Simulator • export PATH=$PATH: /ns-allinone-2.26/bin:/root/ns-allinone-2.26/tcl8.3.2/unix:/ns-allinone-2.26/tk8.3.2/unix • export TCL_LIBRARY= /ns-allinone-2.26/tcl8.3.2/library

23. Network Simulator - Template #Create a simulator object set ns [new Simulator] #Open the nam trace file set nf [open out.nam w] $ns namtrace-all $nf #Define a 'finish' procedure proc finish {} { global ns nf $ns flush-trace #Close the trace file close $nf #Execute nam on the trace file exec nam out.nam & exit 0 } # Insert your own code for topology creation # and agent definitions, etc. here #Call the finish procedure after 5 seconds simulation time $ns at 5.0 "finish" #Run the simulation $ns run

24. Network Simulator • Two nodes, one link set n0 [$ns node] set n1 [$ns node] $ns duplex-link $n0 $n1 1Mb 10ms DropTail

26. Network Simulator • #Create a UDP agent and attach it to node n0 set udp0 [new Agent/UDP] $ns attach-agent $n0 $udp0 • # Create a CBR traffic source and attach it to udp0 set cbr0 [new Application/Traffic/CBR] $cbr0 set packetSize_ 500 $cbr0 set interval_ 0.005 $cbr0 attach-agent $udp0

27. Network Simulator • #Create a Null agent (a traffic sink) and attach it to node n1 set null0 [new Agent/Null] $ns attach-agent $n1 $null0 • #Connect the traffic source with the traffic sink $ns connect $udp0 $null0 • #Schedule events for the CBR agent $ns at 0.5 "$cbr0 start" $ns at 4.5 "$cbr0 stop"

29. Network Simulator • #Create links between the nodes $ns duplex-link $n0 $n2 1Mb 10ms DropTail $ns duplex-link $n1 $n2 1Mb 10ms DropTail $ns duplex-link $n3 $n2 1Mb 10ms SFQ • SFQ (stochastic fair queueing) $ns duplex-link-op $n0 $n2 orient right-down $ns duplex-link-op $n1 $n2 orient right-up $ns duplex-link-op $n2 $n3 orient right

31. Network Simulator • #Define different colors for data flows $ns color 1 Blue $ns color 2 Red $udp0 set class_ 1 $udp1 set class_ 2 • #Monitor the queue for the link between node 2 and node 3 $ns duplex-link-op $n2 $n3 queuePos 0.5

32. Network Simulator • #Connect the traffic sources with the traffic sink $ns connect $udp0 $null0 $ns connect $udp1 $null0 • #Schedule events for the CBR agents $ns at 0.5 "$cbr0 start" $ns at 1.0 "$cbr1 start" $ns at 4.0 "$cbr1 stop" $ns at 4.5 "$cbr0 stop"

35. NS2 - Wireless • set val(chan) Channel/WirelessChannel • set val(prop) Propagation/TwoRayGround • set val(netif) Phy/WirelessPhy • set val(mac) Mac/802_11 • set val(ifq) Queue/DropTail/PriQueue • set val(ll) LL • set val(ant) Antenna/OmniAntenna • set val(x) 670 ;# X dimension of the topography • set val(y) 670 ;# Y dimension of the topography • set val(ifqlen) 50 ;# max packet in ifq • set val(seed) 0.0 • set val(adhocRouting) DSR • set val(nn) 3 ;# how many nodes are simulated • set val(cp) "cbr-3-test" • set val(sc) "scen-3-test" • set val(stop) 400.0 ;# simulation time

36. NS2 - Wireless • # setup topography object set topo [new Topography] • # define topology • $topo load_flatgrid $val(x) $val(y) • # • # Create God • # • set god_ [create-god $val(nn)] • #global node setting • $ns_ node-config -adhocRouting $val(adhocRouting) \ • -llType $val(ll) \ • -macType $val(mac) \ • -ifqType $val(ifq) \ • -ifqLen $val(ifqlen) \ • -antType $val(ant) \ • -propType $val(prop) \ • -phyType $val(netif) \ • -channelType $val(chan) \ • -topoInstance $topo \ • -agentTrace ON \ • -routerTrace OFF \ • -macTrace OFF

38. NS2 - MobileIP • set opt(chan) Channel/WirelessChannel ;# channel type • set opt(prop) Propagation/TwoRayGround ;# radio-propagation model • set opt(netif) Phy/WirelessPhy ;# network interface type • set opt(mac) Mac/802_11 ;# MAC type • set opt(ifq) Queue/DropTail/PriQueue ;# interface queue type • set opt(ll) LL ;# link layer type • set opt(ant) Antenna/OmniAntenna ;# antenna model • set opt(ifqlen) 50 ;# max packet in ifq • set opt(nn) 1 ;# number of mobilenodes • set opt(adhocRouting) DSDV ;# routing protocol • set opt(cp) "" ;# cp file not used • set opt(sc) "" ;# node movement file. • set opt(x) 670 ;# x coordinate of topology • set opt(y) 670 ;# y coordinate of topology • set opt(seed) 0.0 ;# random seed • set opt(stop) 250 ;# time to stop simulation • set opt(ftp1-start) 100.0 • set num_wired_nodes 2

39. NS2 - MobileIP • AddrParams set domain_num_ 3 ;# number of domains • lappend cluster_num 2 1 1 ;# number of clusters in each domain • AddrParams set cluster_num_ $cluster_num • lappend eilastlevel 1 1 2 1 ;# number of nodes in each cluster • AddrParams set nodes_num_ $eilastlevel ;# of each domain • # Create HA and FA • set HA [$ns_ node 1.0.0] • set FA [$ns_ node 2.0.0]

40. NS2 - MobileIP • # Configure for ForeignAgent and HomeAgent nodes • $ns_ node-config -mobileIP ON \ • -adhocRouting $opt(adhocRouting) \ • -llType $opt(ll) \ • -macType $opt(mac) \ • -ifqType $opt(ifq) \ • -ifqLen $opt(ifqlen) \ • -antType $opt(ant) \ • -propType $opt(prop) \ • -phyType $opt(netif) \ • -channelType $opt(chan) \ • -topoInstance $topo \ • -wiredRouting ON \ • -agentTrace ON \ • -routerTrace OFF \ • -macTrace OFF

41. NS2 - MobileIP • # create a mobilenode that would be moving between HA and FA. • # note address of MH indicates its in the same domain as HA. • $ns_ node-config -wiredRouting OFF • set MH [$ns_ node 1.0.1] • set node_(0) $MH • set HAaddress [AddrParams addr2id [$HA node-addr]] • [$MH set regagent_] set home_agent_ $HAaddress

42. NS2 - MobileIP • # MH starts to move towards FA • $ns_ at 100.000 "$MH setdest 640.0000 610.0000000 20.0000000" • # goes back to HA • $ns_ at 200.00000 "$MH setdest 2.000000 2.0000000 20.000000“ • # create links between wired and BaseStation nodes • $ns_ duplex-link $W(0) $W(1) 5Mb 2ms DropTail • $ns_ duplex-link $W(1) $HA 5Mb 2ms DropTail • $ns_ duplex-link $W(1) $FA 5Mb 2ms DropTail

43. # setup TCP connections between a wired node and the MobileHost • set tcp1 [new Agent/TCP] • $tcp1 set class_ 2 • set sink1 [new Agent/TCPSink] • $ns_ attach-agent $W(0) $tcp1 • $ns_ attach-agent $MH $sink1 • $ns_ connect $tcp1 $sink1 • set ftp1 [new Application/FTP] • $ftp1 attach-agent $tcp1 • $ns_ at $opt(ftp1-start) "$ftp1 start“ • # Tell all nodes when the siulation ends • for {set i 0} {$i < $opt(nn) } {incr i} { • $ns_ at $opt(stop).0 "$node_($i) reset"; • } • $ns_ at $opt(stop).0 "$HA reset"; • $ns_ at $opt(stop).0 "$FA reset";

50. Trace file • r 0.950460571 _62_ MAC --- 0 LEE 44 [0 ffffffff 0 800]---[0:255 -1:255 1 0] [0x8 0 0 0 0] • 這個紀錄說明著是node62在MAC層收到這個packet，packet header type 是”Lee”，packet數是0，packet的大小是44 bytes，目的地是 -1表示是在broadcasting，source port and destination port都是255。