Speaker: Dr. Whai-En Chen

Transcription

1 ing peaker: Dr. Whai-En Chen Assistant Professor Institute of Computer cience and Information Engineering National Ilan University (NIU) The source is obtained from Prof. Nen-Fu Huang. 1

2 ing peaker: Dr. Whai-En Chen Assistant Professor Institute of Computer cience and Information Engineering National Ilan University (NIU) The source is obtained from Prof. Nen-Fu Huang. 2

3 ing Tag witching MPL All rights reserved. No part of this publication and file may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without prior written permission of Professor Nen-Fu Huang ( nfhuang@cs.nthu.edu.tw). 3

4 ing Outline Industry Trends and ing Introduction to ing Concepts, Protocols, Hardware Implementing ing Concepts, Test sites 4

5 Networking Trends - More Bandwidth, - New Technology, - The Internet!.. Users s need more BandwidthBridges dt dges - outers - witches The Internet & Intranetworking 5

6 Network Waves - Leading to ing PC Networks Proliferate time Bridges outers Internet ATM & Fast Ethernet Networking Trends 6

7 Network Waves - Leading to ing outers PC Networks Proliferate time Bridges outers Internet ATM & Fast Ethernet Networking Trends 7

8 Network Waves - Leading to ing ATM & Internet outers PC Networks Proliferate time Bridges outers Internet Networking Trends 8

9 Network Waves - Leading to ing witches & Intranet ATM & Internet outers PC Networks Proliferate time Bridges outers ATM & Internet witches & Intranet Networking Trends 9

10 Network Waves - Leading to ing ing ATM & Internet witches & Fast Ethernet outers PC Networks Proliferate time Bridges outers ATM & witches & Internet Fast Ethernet Networking Trends ing 10

11 Trends - from the Net Mgr. Perspective More functionality Functionality Ethernet witching Bridges Performance outers IP witching More performance at lower cost 11

12 KT! K.T..! --Keep the olutions imple! Keep the users happy Keep costs low Keep Performance highh Keep frustration low 12

13 It s ing 13

14 Introduction to ing 14

15 A Typical outed Network Today End tations ATM/Ethernet/Optical witches outers (typically) witches or outers 15

16 Collapsed Backbone outer Network Today End tations Bottleneck outer Network Ethernet Link Leased Line outers or Bridges 16

17 es - An Alternative End tations es ATM link outers (or sometimes Bridges) es use same routing technology as routers ATM is a link level, point-to-point technology 17

18 ing Overlay on an ATM Network End tations es outers or Bridges Edge outers or Bridges es use same routing technology as routers witch controllers communicate with edge routers as peers ustained IP flows bypass the controller through low latency ATM switch hardware ATM links interconnect es 18

19 is a... Device that integrates... + = IP outing witching into a single platform that provides... simplest way to get the price/performance and quality of service of hardware switching very high-performance IP forwarding while keeping the flexibility of routing 19

20 ing Technology Gateway Legacy LANs or WANs IP outer with IP witching enhancements Controller ATM Links ATM witch with ing Code Host Driver 20

21 The ing olution Platform Independent Data Video Voice Combine Internet Protocol IP oftware + IP oftware Best-of-Breed Hardware Controller o ATM witch Controller o Frame elay witch Controller o Ethernet, T, FDDI witch Controller o Optical witch 21

22 Connections Attach directly or use the Gateway ervers IP Driver Gateway s/w Internetworking outer IP Driver 10/100/1000, Ethernet or ATM 10/100/1000, Ethernet or ATM IP outer IFMP Added IP ing Driver witch Direct Connections IP ing Driver IFMP Added 22 22

23 ing Protocols Upstream Node IFMP GMP IFMP Downstream Node General witch Management Protocol (GMP) imple protocol that provides call setup, tear-down, and call status upported on ATM witch upported on Controller IP Flow Management Protocol (IFMP) Protocol between multiple es or hosts Protocol used to send flow redirection messages 23

24 Operation Initial Path IP packets are forwarded hop-by-hop using a default virtual channel (VC). ATM cells are reassembled into IP packets at each hop. The Controller makes a flow classification decision according to the IP packets. Direct Host Controller ATM Node Gateway Upstream Node ATM Cells ATM Fabric ATM Cells Downstream Node 24

25 Operation Controller Labels a elected Flow Controller sends an IFMP message to the upstream node to use a new VC for the selected flow. Traffic for the selected flow begins to flow on the new VC the upstream flow is labeled. Upstream Node ATM Cells Controller ATM Fabric Downstream Node 25

26 Operation Downstream Node Also Labels Flow Downstream node also sends an IFMP request for a new VC. sends traffic for that flow to the downstream node on the new VC the downstream flow is labeled. l Upstream Node ATM Cells Controller ATM Fabric ATM Cells Downstream Node 26

27 Operation IP Flows at ATM Link peeds! Incoming labeled flow switched through to outgoing labeled flow. Cut-through operation completed for flow-oriented traffic. Controller Upstream Node ATM Cells ATM Fabric ATM Cells Downstream Node 27

28 How Do Packets Traverse es? Initial IP Packet edirect Control Protocol (IFMP) After redirection, subsequent packets flow directly through h ATM switch! IP Flow 28

29 ing - A review IP outer ATM witch IP oftware MAC Layer Transport ing combines the IP oftware proven functionality of IP with the hardware ATM HW ATM HW switching speed of ATM ATM Forum oftware 29 29

30 Flow-Oriented Traffic Flows consist of multiple, similar packets, for example, the same source/destination addresses, type of service,,protocol Long-lived flows are ideal for cut-through switching hort-lived transactions are ideal for datagram forwarding Over 90% of bytes can be switched, less than 10% routed! Flow-Oriented Traffic File transfer (FTP) Telnet HTTP Web image downloads Multimedia audio/video hort-lived Traffic Name look-ups (DN) Network Time Protocol (MTP) Post Office Protocol (POP) NMP 30

31 ing Campus, Building, and Departmental Backbones OC3 Direct Attached ervers OC3/12 OC3/12 OC3/12 OC3 OC3 ing in Backbones Very high IP throughput Gbps of switching performance with IP routing functionality Complements existing routed networks and LAN switching IP Gateway used for LAN connections upports direct attached ATM servers Gateway Gateway Gateway Gateway Conventional outer 10 Mbps 100 Mbps 10 Mbps 100 Mbps 10 Mbps 100 Mbps FDDI outer 31 31

32 ing Protocols IFMP ( IP Flow Management Protocol ) Two associated FCs FC 1953 specifies IFMP FC 1954 provides transmission specifics GMP (General witch Management Protocol) Between the controller and the witch Call etup and tear down Add and delete leaves in point-to-multipoint connection manage switch ports configuration and statistics 32

33 outing Protocols upported OPF IP DVMP( distance vector multicast routing protocol) outer Discovery Under consideration for future support BGP 4, VP, I-I 33