實驗七

MBONE 之操作與協定分析Instructor:

Teaching Assistant:

1999/4/20

High Speed Network lab.

Department of Computer Information Science, NCTU

Outline

• NetXRay Operation Guide

• MBONE Overview– Architecture, Key Knowledge, Operation,

Protocol Stack

• MBONE Application Operation Guide

• Experiment Requirements

NetXRay Operation Guide

設定封包位址

設定封包樣版

設定封包採用的協定

單一封包資料圖

封包流向圖

協定分佈圖

封包大小分佈圖

主機流量統計表

• IP multicast– class D IP address, 224.0.0.0 ~ 239.255.255.255

– all systems on this subnet 224.0.0.1

– all routers on this subnet 224.0.0.2

– all DVMRP routers 224.0.0.4

• IP tunnel– IP-in-IP

MBONE Key Knowledge

• IGMP (Internet Group Management Protocol)– Join, Query, Report

– Leave (IGMPv2)

– Group-Source Report (IGMPv3)

– IGMP DVMRP (between mrouters)

• Multicast Router (mrouter)– Groups database, Multicast routing

MBONE Key Knowledge

• DVMRP (Distance Vector Multicast Routing Protocol)– soft-state unicast routing table (single-source shortest

path algorithms - Bellman-Ford,..)

– RPM (Reverse Path Multicasting) to build per-source-group multicast tree

– check source and routing table for RPM

– check destination and IGMP database for multicast within this subnet

– route exchange, prune, graft, graft ack (via IGMP DVMRP)

MBONE Key Knowledge

LAN 1

A

LAN 2

C

LAN 3

D

IP tunnel IP unicast router Internet host IP multicast router

mr-1

mr-2

LAN 4E

mr-3

mr-4

ur-1

ur-2

ur-4

ur-3

B

MBONE Architecture

LAN

RIP,EGP,GGP..UDP TCP

SessionDirectory

RTP, RTCPITU-T.120

ITU-H.320

WhiteBoard

Real-TimeVideo

Real-TimeAudio

H.26x G.7xx

IP

IGMP

IP tunnel

MBONE Protocol Stack

• Session directory– Create, Join, Query

– sd, sdr, ...

• Audio– rat, vat, ...

• Video– nv, nic, CU-SeeMe...

• Whiteboard• Shared Mosaic• Integrated

– MBONE_Tools

MBONE Applications

MBONE Applications

MBONEApplications

MBONEApplications

MBONEApplications

140.113.88.xxx

140.113.207.xxx

140.113.23.xxx

Tunnel 140.113.23.102 ― 207.126.96.4

Tunnel 140.113.23.102 ― 140.113.207.127 Tunnel 140.113.23.102 ― 140.113.88.158

cissol2

linux

atm5

cis router cc router

電資中心

207.126.96.4

GlobalMbone

Internet

NCTU CIS MBONE Platform

實驗報告要求：•實驗報告應該包括下列項目：實驗名稱、組員與系級、實驗目的、設備與操作環境、所觀察協定之背景知識、方法與步驟、觀察與紀錄、討論（針對問題與討論的項目回答，或自行提出問題並討論之）及參考書目，不可 copy-and-paste。報告篇幅限定為 8~10頁(A4)，一律繳交雷射或噴墨列印之完稿。