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Fundamental of IP network ～ ping, traceroute ～ Practice 1 Information and Communications Technology Internet Engineering.

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Presentation on theme: "Fundamental of IP network ～ ping, traceroute ～ Practice 1 Information and Communications Technology Internet Engineering."— Presentation transcript:

1 Fundamental of IP network ～ ping, traceroute ～ Practice 1 Information and Communications Technology Internet Engineering

2 Information and Communications Technology /Internet Engineering 1 Internet Mechanism ex. Web browse General Family Internet Service Provider (ISP) Telephone-Line, ADSL, Optical fiber... Mobile Phone Company (A kind of ISP) Base Station Mobile Phone server Internet Request data

3 Information and Communications Technology /Internet Engineering 2 IP (Internet Protocol) Protocol: set of rules that end points in a telecommunication connection use when they communicate Internet use IP –Each machine has an unique IP address –Data is sent one way from machine A to machine B –Data is divided into many parts and send to the network division combination Web Server (Sender) User (receiver) 130.34.189.2 IP address 130.34.195.11 Internet

4 Information and Communications Technology /Internet Engineering 3 Data Transmit using Packet Divided data is send by packet Divided data ＋ Header ＝ Packet Header contains IP address of sender IP address of receiver Other information packet package 、 parcel content Information of receiver

5 Information and Communications Technology /Internet Engineering 4 IP (Internet Protocol) Function Select a route in the network for sending packet –Router forward packet based on receiver IP address, which is contained in IP header Router 2Router 1 Router 3 ACAC BFBF EDED Packet A B C D E F

6 Information and Communications Technology /Internet Engineering 5 Checking packet reach destination ping –Command (in Solaris) –To stop sending message please press [Ctrl ＋ C] % ping –s Machine Name or IP Address Send every second

7 Information and Communications Technology /Internet Engineering 6 Attention ！ Please don’t execute Ping command to a specific machine to avoid warning about attacking 、 For example Send to a university or company’s machine in your province Send to a machine in your laboratory If you don’t know the name of machine that you want to use ping command, using web search site （ Google 、 Yahoo...!! ） to search the name of university or company. Then using the URL for Ping command. Ex. If URL is 「 http://www.it.ecei.tohoku.ac.jp/lecture/ 」： Machine name will be [www.it.ecei.tohoku.ac.jp 」 For security reason, in some case even though we can view web page, but no reply for ping command.

8 Information and Communications Technology /Internet Engineering 7 Example of execute Ping eiw01 % ping -s www.u-tokyo.ac.jp PING www.u-tokyo.ac.jp: 56 data bytes 64 bytes from www.u-tokyo.ac.jp (133.11.128.254): icmp_seq=0. time=14. ms 64 bytes from www.u-tokyo.ac.jp (133.11.128.254): icmp_seq=1. time=14. ms 64 bytes from www.u-tokyo.ac.jp (133.11.128.254): icmp_seq=2. time=15. ms 64 bytes from www.u-tokyo.ac.jp (133.11.128.254): icmp_seq=3. time=14. ms 64 bytes from www.u-tokyo.ac.jp (133.11.128.254): icmp_seq=4. time=14. ms 64 bytes from www.u-tokyo.ac.jp (133.11.128.254): icmp_seq=5. time=14. ms 64 bytes from www.u-tokyo.ac.jp (133.11.128.254): icmp_seq=6. time=14. ms 64 bytes from www.u-tokyo.ac.jp (133.11.128.254): icmp_seq=7. time=14. ms 64 bytes from www.u-tokyo.ac.jp (133.11.128.254): icmp_seq=8. time=14. ms 64 bytes from www.u-tokyo.ac.jp (133.11.128.254): icmp_seq=9. time=14. ms ^C ----www.u-tokyo.ac.jp PING Statistics---- 10 packets transmitted, 10 packets received, 0% packet loss round-trip (ms) min/avg/max = 14/14/15 Round trip delay time ※ maximum /average/minimu m RTT (round-trip time) Unit: ms Packet loss rate （ The rate of packets don’t reach to destination) ※ Time from sending packet to receiving reply packet

9 Information and Communications Technology /Internet Engineering 8 Checking the route to destination traceroute –Command (Solaris) –Please use traceroute for different machine as ping % traceroute –q 1 Machine Name Or IP address Trial times

10 Information and Communications Technology /Internet Engineering 9 Example of execute traceroute (1) eiw01 % traceroute -q 1 www.kyoto-u.ac.jp traceroute: Warning: Multiple interfaces found; using 130.34.195.11 @ fjgi1 traceroute to www.kyoto-u.ac.jp (130.54.120.209), 30 hops max, 40 byte packets 1 130.34.195.126 (130.34.195.126) 0.737 ms 2 eigw.ec.ecei.tohoku.ac.jp (130.34.195.1) 0.673 ms 3 192.168.226.41 (192.168.226.41) 0.545 ms 4 192.168.230.42 (192.168.230.42) 0.526 ms 5 br0900.net.tohoku.ac.jp (130.34.10.137) 0.582 ms 6 202.211.0.194 (202.211.0.194) 0.779 ms 7 sendai-dc-RM-GE-7-1-0-103.sinet.ad.jp (150.99.190.13) 0.992 ms 8 tsukuba-dc-RM-AE-1-11.sinet.ad.jp (150.99.203.6) 9.105 ms 9 tokyo1-dc-RM-AE-2-11.sinet.ad.jp (150.99.203.10) 28.306 ms 10 nagoya-dc-RM-AE-0-11.sinet.ad.jp (150.99.203.26) 19.029 ms 11 osaka-dc-RM-AE-0-11.sinet.ad.jp (150.99.203.30) 22.007 ms 12 kyoto-dc-RM-AE-0-11.sinet.ad.jp (150.99.203.34) 25.667 ms 13 kyoto-u.gw.sinet.ad.jp (150.99.190.38) 26.142 ms 14 * 15 * 16 RS4-8-V869.gw.kuins.kyoto-u.ac.jp (130.54.2.105) 26.790 ms 17 * 18 130.54.120.209 (130.54.120.209) 28.330 ms Hop number （ number of via router ） Via router Round trip delay time (RTT) *: no reply

11 Information and Communications Technology /Internet Engineering 10 eiw01 % traceroute -q 1 www.bbc.co.uk traceroute: Warning: Multiple interfaces found; using 130.34.195.11 @ fjgi1 traceroute to www.bbc.net.uk (212.58.224.86), 30 hops max, 40 byte packets 1 130.34.195.126 (130.34.195.126) 0.738 ms 2 eigw.ec.ecei.tohoku.ac.jp (130.34.195.1) 0.705 ms 3 192.168.226.41 (192.168.226.41) 0.732 ms 4 192.168.230.42 (192.168.230.42) 0.602 ms 5 br0900.net.tohoku.ac.jp (130.34.10.137) 0.565 ms 6 202.211.0.194 (202.211.0.194) 5.893 ms 7 sendai-dc-RM-GE-7-1-0-104.sinet.ad.jp (150.99.190.17) 1.004 ms 8 tsukuba-dc-RM-AE-1-11.sinet.ad.jp (150.99.203.6) 9.057 ms 9 tokyo1-dc-RM-AE-2-11.sinet.ad.jp (150.99.203.10) 13.715 ms 10 TYO1-gate1-XGE-1-0.sinet.ad.jp (150.99.189.250) 13.936 ms 11 NYC-gate1-P3-0.sinet.ad.jp (150.99.198.246) 188.526 ms 12 65.59.192.29 (65.59.192.29) 188.517 ms 13 vlan89.csw3.NewYork1.Level3.net (4.68.16.190) 192.567 ms 14 ae-81-81.ebr1.NewYork1.Level3.net (4.69.134.73) 189.963 ms 15 ae-4.ebr2.London1.Level3.net (4.69.132.110) 268.990 ms 16 ae-21-52.car1.London1.Level3.net (4.68.116.47) 261.127 ms 17 212.58.238.153 (212.58.238.153) 259.548 ms 18 www41.thdo.bbc.co.uk (212.58.224.86) 260.000 ms Example of execute traceroute (2)

12 Information and Communications Technology /Internet Engineering 11 Science Information Network (SINET) SINET3 Web page (http://www.sinet.ad.jp/) extract from ・ change a parthttp://www.sinet.ad.jp/

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