3Com 5000 ATM manual Multiple Redundancy Levels, ATM Forum Specification Compliance

1-2CHAPTER 1: INTRODUCTION

Multiple Redundancy Levels

You can configure the ATM Backbone SwitchModule for two levels of redundancy:

■PHY Redundancy — A secondary ATM OC-3 card provides PHY redundancy. If the primary ATM OC-3 card or attached cable fails or performance fails or is no longer receiving light, the redundant ATM OC-3 card becomes active to maintain operations, if PHY switchover is enabled.

■Module Redundancy — Adding a second ATM Backbone SwitchModule to the CoreBuilder 5000 hub in a dual-homing configuration allows you to load-balance ATM requirements while providing automatic module failover if one of the modules fails.

ATM Forum Specification Compliance

The ATM Backbone SwitchModule is fully compliant with the following

ATM Forum specifications:

■UNI 3.0/3.1

■LANE 1.0

CoreBuilder 5000 Chassis Compatibility

You can install and operate the ATM Backbone SwitchModule in any

CoreBuilder 5000 17-slot, 10-slot, or 7-slot chassis that contains a

PacketChannel backplane.

Switched Virtual Circuit Capacity

Each ATM Backbone SwitchModule supports up to 512 simultaneous switched virtual circuit (SVC) connections.

Emulated LAN (ELAN) Capacity

Each ATM Backbone SwitchModule provides up to 64 LAN Emulation Clients (LECs) for connection to 64 Emulated LANs (ELANs). These virtual LANs can be managed using the 3Com Transcend® Enterprise VLAN Manager (v4.1 or later), a graphical interface tool that greatly simplifies the management of virtual and emulated LANs.