83
Tsi574 User Manual
June 6, 2016
Integrated Device Technology
www.idt.com
4.
Internal Switching Fabric
This chapter describes the main features and functions of the Tsi574’s Internal Switching Fabric (ISF).
It includes the following information:
•
•
“Functional Behavior” on page 84
•
“Arbitration for Egress Port” on page 86
4.1
Overview
The Internal Switching Fabric (ISF) is the crossbar switching matrix at the core of the Tsi574. It
transfers packets from ingress ports to egress ports and prioritizes traffic based on the RapidIO priority
associated with a packet and port congestion.
The ISF has the following features:
•
Full-duplex, non-blocking, crossbar-based switch fabric
•
10 Gbits/s fabric ports allow up to 10x internal speedup
•
Manages head-of-line blocking on each port
•
Cut-through and store-and-forward switching of variable-length packets