Avaya P580 User Manual page 30

Chapter 1
Switch Fabric
1-4
In Fabric mode 1, the switching fabric provides 45.76 Gbps aggregate
bandwidth. In Fabric mode 2 (P580 only), the switching fabric provides
54.91 Gbps aggregate bandwidth.
The crossbar switch matrix provides low latency, high throughput packet
switching using a crossbar architecture
Figure 1-1. Crossbar Architecture
Port 1
1.76 Gb/s
Port 2
Port 13
The crossbar supports:
13 fabric ports (two per I/O module slot, one for the supervisor
module).
1.76 Gbps (in and out) on each fabric port in 50-series mode and
2.11 Gbps (in and out) on each fabric port in Fabric mode 2.
45.76 Gbps backplane capacity in Fabric mode 1 and 54.91 Gbps
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.
User Guide for the Avaya P580 and P882 Multiservice Switches, v6.0
(Figure 1-1).
22.88 Gb/s
45.76 Gb/s
1.76 Gb/s
Port 13
Port 1
Port 2
Crossbar