Avaya 580 - Manual (Page 28)

1-4 User Guide for the Avaya P580 and P882 Multiservice Switches, v6.1
Chapter 1
Switch Fabric 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 ).
Figure 1-1. Crossbar Architecture
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.
Crossbar
Port 1
Port 2
Port 13
1.76 Gb/s
22.88 Gb/s
Port 1
Port 2
Port 13
1.76 Gb/s 45.76 Gb/s