MBONE WEBCAST: NETWORK SETUP AND DATA COLLECTION
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1 MBONE WEBCAST: NETWORK SETUP AND DATA COLLECTION Milan Nikolić Dan Hoffman Ljiljana Trajković Communication Networks Laboratory Simon Fraser University
2 Road map Introduction MBone application tools MBone test session and network setup IFSA/NAFIPS 2001 MBone live webcast Data collection and processing Conclusions IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 2
3 Introduction Multicasting is used to send data packets across the Internet: videoconferencing corporate communications distance learning applications. Multicast session of the Open Forum workshop at the IFSA/NAFIPS 2001 held in Vancouver was webcast on July 25, IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 3
4 Introduction (cont.) We provide an overview of the Internet Multicast Backbone (MBone) multimedia application tools. We describe details of the MBone multicast sessions and the webcast setup at the IFSA/NAFIPS 2001 conference. Data collection was performed during the multicast and traffic traces were later used for network simulation. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 4
5 MBone application tools sdr: multicast session directory tool; enables users to join the multicast sessions rat: robust audio tool vic: videoconferencing tool MBone application tools setup for the live webcast. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 5
6 MBone application tools sdr: multicast session directory tool; enables users to join the multicast sessions rat: robust audio tool vic: videoconferencing tool MBone application tools setup for the live webcast. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 6
7 MBone application tools sdr: multicast session directory tool; enables users to join the multicast sessions rat: robust audio tool vic: videoconferencing tool MBone application tools setup for the live webcast. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 7
8 MBone application tools sdr: multicast session directory tool; enables users to join the multicast sessions rat: robust audio tool vic: videoconferencing tool MBone application tools setup for the live webcast. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 8
9 MBone protocol architecture MBone uses ITU H.323 standard for IP/Ethernet LAN multimedia conferencing: rat supports audio quality in the range from LPC at 5.6 khz to PCM at 64 khz (ITU G.721). vic uses ITU H.261 video encoder. wbd and nte use ITU T.120 Data Conferencing standard. MBone tools are based on IETF standards. They use RTP (Real-time Transport Protocol) over UDP/IP connections. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 9
10 Internet Multicast Backbone (MBone) MBone is the multicast capable backbone of the Internet. Multicasting is a way of sending data packets from a host computer to a set of hosts called multicast group. Multicast routing protocols: Distance Vector Multicast Routing Protocol (DVMRP) Protocol Independent Multicast (PIM) Internet Group Management Protocol (IGMP). IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 10
11 Multicasting and tunneling DVMRP protocol provides connectionless datagram delivery to the multicast group members. Multicast enabled routers are connected via highbandwidth tunnels. Tunneling is a technology that enables one network to send its data via another network's connections. mrouted encapsulates multicast packets into unicast IP packets and enables a UNIX workstation to serve as a multicast-capable router. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 11
12 Tunneling Tunneling works by encapsulating a network packet within a packet carried by the second network. Tunneling a car from France to England. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 12
13 Test session in the CNL at SFU Network setup for the MBone test session in the CNL laboratory at SFU. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 13
14 Test session in the CNL at SFU Network setup for the MBone test session in the CNL laboratory at SFU. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 14
15 Test session in the CNL at SFU Network setup for the MBone test session in the CNL laboratory at SFU. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 15
16 Test session in the CNL at SFU Network setup for the MBone test session in the CNL laboratory at SFU. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 16
17 Test session in the CNL at SFU Network setup for the MBone test session in the CNL laboratory at SFU. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 17
18 Live MBone webcast session at the IFSA/NAFIPS conference Network setup for the MBone webcast session at the IFSA/NAFIPS conference. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 18
19 Live MBone webcast session at the IFSA/NAFIPS conference Network setup for the MBone webcast session at the IFSA/NAFIPS conference. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 19
20 Live MBone webcast session at the IFSA/NAFIPS conference Network setup for the MBone webcast session at the IFSA/NAFIPS conference. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 20
21 Live MBone webcast session at the IFSA/NAFIPS conference Network setup for the MBone webcast session at the IFSA/NAFIPS conference. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 21
22 Live MBone webcast session at the IFSA/NAFIPS conference Network setup for the MBone webcast session at the IFSA/NAFIPS conference. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 22
23 Live MBone webcast session at the IFSA/NAFIPS conference Network setup for the MBone webcast session at the IFSA/NAFIPS conference. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 23
24 Two MBone networks There are two MBone networks: Commodity MBone CA*net 3/Internet2 MBone. CANARIE s CA*net 3 is optical network using Dense Wavelength Division Multiplexing (DWDM). CA*net II and USA high-speed Internet2 systems are implemented over ATM/SONET/DWDM. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 24
25 Tunneling setup The /etc/rc.conf file: # -- sysinstall generated deltas -- # # Enable network daemons for user convenience. # This file now contains just the overrides from /etc/defaults/rc.conf # please make all changes to this file. gateway_enable="yes" # defaultrouter=" " hostname="mbone1.ensc.sfu.ca" ifconfig_gif0="inet netmask " ifconfig_xl0="dhcp" ifconfig_rl0="inet netmask " inetd_enable="no" kern_securelevel="2" kern_securelevel_enable="yes" nfs_server_enable="no" portmap_enable="no" sendmail_enable="no" sshd_enable="yes" IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 25
26 Tunneling setup The /etc/rc.conf file: # -- sysinstall generated deltas -- # # Enable network daemons for user convenience. # This file now contains just the overrides from /etc/defaults/rc.conf # please make all changes to this file. gateway_enable="yes" # defaultrouter=" " hostname="mbone1.ensc.sfu.ca" ifconfig_gif0="inet netmask " ifconfig_xl0="dhcp" ifconfig_rl0="inet netmask " inetd_enable="no" kern_securelevel="2" kern_securelevel_enable="yes" nfs_server_enable="no" portmap_enable="no" sendmail_enable="no" sshd_enable="yes" IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 26
27 Tunneling setup (cont.) Assigned IP addresses: IP address: Subnet Mask: Default Gateway: Routing table was obtained using the command netstat -rn: Routing tables Internet: Destination Gateway Flags Refs Use Netif default UGSc 2 21 xl /23 link #1 UC 0 0 gif UH 0 2 l /29 link #2 UC 0 0 rl0 IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 27
28 Tunneling setup (cont.) Assigned IP addresses: IP address: Subnet Mask: Default Gateway: Routing table was obtained using the command netstat -rn: Routing tables Internet: Destination Gateway Flags Refs Use Netif default UGSc 2 21 xl /23 link #1 UC 0 0 gif UH 0 2 l /29 link #2 UC 0 0 rl0 IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 28
29 Tunneling setup (cont.) The /etc/rc.local file: route delete default route add default gifconfig gif0 inet route add -net route add -net mrouted The DVMRP tunnel was configured in the /etc/mrouted.conf file: tunnel IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 29
30 Tunneling setup (cont.) The /etc/rc.local file: route delete default route add default gifconfig gif0 inet route add -net route add -net mrouted The DVMRP tunnel was configured in the /etc/mrouted.conf file: tunnel IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 30
31 Tunneling setup (cont.) The /etc/rc.local file: route delete default route add default gifconfig gif0 inet route add -net route add -net mrouted The DVMRP tunnel was configured in the /etc/mrouted.conf file: tunnel IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 31
32 Live MBone webcast session at the IFSA/NAFIPS conference Network setup for the MBone webcast session at the IFSA/NAFIPS conference. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 32
33 Live MBone webcast session at the IFSA/NAFIPS conference Network setup for the MBone webcast session at the IFSA/NAFIPS conference. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 33
34 MBone webcast measurements The audio/video and measurement equipment setup for the live webcast. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 34
35 Webcast data collection Data was captured using tcpdump: 13:23: > : udp :23: > : udp :23: > : udp 96 13:23: > : udp 96 13:23: > : udp 96 We extracted the traffic trace with inter-arrival times [sec] and packet sizes [bytes] (sample): IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 35
36 Webcast data processing Genuine traffic traces were used to simulate multimedia conferencing. Video-recorded webcast was processed using Adobe Premiere. It has been posted on the IFSA/NAFIPS web page IfsaNafips2001.html. Available in Real Player and Windows Media Player formats. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 36
37 Conclusions We organized the multicast session of the Open Forum workshop held at the IFSA/NAFIPS 2001 conference in Vancouver. We performed several test multicasts on the MBone. Genuine traffic traces were collected during the webcast and were used to analyze impact of traffic on the network performance. Archived webcast is posted on the IFSA/NAFIPS web page IfsaNafips2001.html. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 37
38 References H. Eriksson, MBONE: the multicast backbone, Com-munications of the ACM, vol. 37, no. 8, pp , August D. Estrin et al., Protocol Independent Multicast Sparse Mode (PIM-SM): Protocol Specification, Request for Comments 2362, Internet Engineering Task Force, June 1998: Joint 9th IFSA World Congress and 20th NAFIPS International Conference, Vancouver, July 25-28, 2001: V. Kumar, Real-Time Multimedia Broadcasts with the Internet Multicast Backbone, February 1997: MBone conferencing applications: K. Savetz, N. Randall, and Y. Lepage, MBONE: Multicasting Tomorrow s Internet. Foster City, CA: IDG Books Worldwide, D. Waitzman, C. Partridge, and S. Deering, Distance Vector Multicast Routing Protocol, Request for Comments 1075, Internet Engineering Task Force, November 1988: IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 38
39 Acknowledgements We thank: Michael Smith and William Gruver for inviting us to webcast the IFSA/NAFIPS 2001 workshop. Peter VanEpp for providing networking expertise. Edward Yan for post-processing of recorded webcast. IMSA 2003: August 13-15, 2003 MBone webcast: network setup and data collection 39
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