Avaya P580 - Manual (Page 35)

Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1 1-7
Introduction
The Avaya P880/P882 Multiservice switch chassis crossbar supports:
■
33 fabric ports (two per I/O module slot, plus one for the
supervisor module - Fabric mode 2).
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1.76 Gb/s (in and out) on each fabric port in Fabric mode 1
and 2.11 Gb/s (in and out) on each fabric port
in Fabric mode 2.
■
56.32 Gb/s backplane capacity in Fabric mode 1 and 139.392
Gb/s backplane capacity in Fabric mode 2.
■
Under-subscribed switching fabric in most configurations.
■
Single copy replication - Input frames destined for multiple
output switch ports pass through the crossbar only once and
are copied by the crossbar to each destination.
■
Hardware-assisted multicast pruning - The switch only
forwards to appropriate destination switch ports
50-Series Modules
The Avaya P550R/P580/P880/P882 Multiservice switches support
the following 50-Series modules:
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Layer 3 Supervisor Module
■
Layer 2 and Layer 3 Fast Ethernet Modules
■
Layer 2 and Layer 3 Gigabit Modules
■
ATM Uplink Module
The layer 2 and layer 3 media modules implement wire speed
routing and bridging in ASICs. The routing and bridging ASICs can
process 1.5 million packets per second of minimum-sized Ethernet
frames.
* Note: All layer 3 modules interoperate with layer 2 modules.
Layer 3 supervisor modules are responsible for learning addresses,
and managing the address cache and the Spanning Tree Protocol
(STP), as well as other management functions.
The ATM Uplink module provides LAN Emulation (LANE)
connectivity over an ATM network.