89TSF5xx Features
◆ Up to 32 switch ports, with 24 Gbps available per switch port.
◆ Variable length CSIX payload (up to 132 bytes) that supports
any type of traffic.
◆ Virtual output queues (VOQs) in the ingress direction that
eliminate head-of-line blocking. The 256 unicast VOQs
provide:
– A maximum of 32 ports with 8 CoS, or
– A maximum of 16 ports with 4 subports and 4 CoS.
◆ Spatial multicast support with up to 4K global multicast
labels. Each multicast label can specify from 1 to 32 ports.
◆ Efficient backpressure mechanism that eliminates cell loss
caused by congestion.
◆ In-service scalable architecture.
◆ “Stackable” architecture. Total aggregate bandwidth is
linearly proportional to the number of 89TSF500s. Port rate is
configurable up to OC-192.
◆ Always non-blocking architecture across destination, traffic
type (cell, packet), and class of service (CoS).
◆ Supports up to 4 egress subports per switch port.
◆ Carrier class reliability features:
– Flexible architecture that allows the 89TSF switch fabric to be
employed in a single switch shelf or in multiple switch shelves.
– Automatic link diagnostics that detect faulty link connections.
– Both n+m (load-sharing mode) and 1:1 protection (active/
standby mode) on serial links.
– Patented error correction scheme to reduce the system bit error
rate by 105.
– Line cord redundancy via Redundant Destination Mapping
(RDM) and Queue-Mapped Redundancy (QMR).
– Dynamic 89TSF500 rerouting that avoids congested or faulty
89TSF500s.
– Zero cell loss during controlled switchover to standby
89TSF500s.
◆ Advanced diagnostic features including multiple loopback
paths.
◆ Unicast and multicast traffic with up to 8 classes of service.
◆ Industry-standard CSIX-over-LVDS interface.
◆ Backward compatibility with IDT’s ZSF200 switch fabric.