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HAPTER
1: I
NTRODUCTION
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.