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Chapter Objectives

Chapter Objectives. After completing this chapter you will be able to: Outline the issues encountered when internetworking IP and ATM Outline the Classical IP over ATM (CLIP), Local Area Network Emulation (LANE), Multiprotocol over ATM (MPOA) and Multiprotocol Label Switching (MPLS).

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Chapter Objectives

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  1. Chapter Objectives • After completing this chapter you will be able to: • Outline the issues encountered when internetworking IP and ATM • Outline the Classical IP over ATM (CLIP), Local Area Network Emulation (LANE), Multiprotocol over ATM (MPOA) and Multiprotocol Label Switching (MPLS)

  2. IP address Vs. ATM address • ATM Address: 20 Bytes 47.009181000000006170530118.00400BFF0013.00 (Written in hexadecimal) • IP Address: 4 Bytes 220.190.40.56 (Written in dotted decimal notation)

  3. 1 Here's B's IP address. Can you give me B's ATM address? 2 ATM ARP server returns B's ATM address to A. 3 Using B's ATM address, A can now use ATM signalling to set up a connection to B. When the connection is up traffic can flow. Classical IP over ATM ATM ARP Server. Maintains a table of IP addresses mapped to corresponding ATM addresses. 1 A 2 B 3 Router with ATM interface Router with ATM interface

  4. ETHERNET ETHERNET ETHERNET LAN Switch LAN Switch LAN Switch LAN Switch Local Area Network Emulation (LANE) Traditional LAN End station notices no difference Emulated LAN ETHERNET ATM ETHERNET

  5. ETHERNET ATM ETHERNET ELAN 1 ETHERNET ATM ETHERNET ELAN 2 ETHERNET ATM ETHERNET LAN Switch LAN Switch LAN Switch LAN Switch LAN Switch LAN Switch ELAN 3 Multiprotocol Over ATM (MPOA) • MPOA enables direct ATM connections between multiple Emulated LANs

  6. So... ...And replace the ATM software with new software that understands IP. Let's keep the ATM hardware... IP Addressing IP Routing Label Distribution Protocol (LDP) UNI Signaling PNNI Signaling PNNI Routing ATM Addressing The Label Distribution Protocol can be thought of as 'IP signaling'.

  7. Network B Label Switched Paths

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