IBM ATM OC-3c 用户手册

IBM

C

ONTENTS

BOUT

HIS

UIDE

ATM Terminology 1

Finding Information in This Guide 2

Related Documentation 3

AND

ATM Benefits 1-1

ATM Module Features 1-2

AYER

The Layered Network Architecture 2-1

Upper Layer Protocols 2-2

What is LAN Emulation (LANE)? 2-2

LAN Emulation Components 2-3

LAN Emulation Client (LEC) 2-3

LAN Emulation Server (LES) 2-3

Broadcast and Unknown Server (BUS) 2-3

LAN Emulation Configuration Server (LECS) 2-3

LAN Emulation Components in Your Network 2-4

LAN Emulation and IBM Devices 2-4

Joining the ELAN 2-5

Locating the LECS 2-5

Mapping Ethernet and ATM Addresses 2-6

Address Resolution 2-6

LAN Emulation Address Resolution Protocol (LE_ARP)

What Happens to Unicast Frames? 2-7

What Happens to Broadcast and Multicast Frames? 2-7

ATM Adaptation Layer (AAL) 2-8

Asynchronous Transfer Mode (ATM) Layer 2-8

ATM is Cell-based 2-8

ATM is Service Transparent 2-9

ATM is Connection-oriented 2-9

Switched Virtual Circuits (SVCs) 2-12

Permanent Virtual Circuits (PVCs) 2-12

ATM Interfaces 2-12

Interim Local Management Interface (ILMI) 2-13

ATM Address Registration 2-13

The ATM Layer and Cell Structure 2-14

Physical Layer 2-15

SONET STS-3c 2-15

What is a Virtual LAN (VLAN)? 3-1

Creating Inter-switch VLANs 3-1

Extending VLANs into the ATM Network 3-2