10
SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide Introduction
Features and Specifications
This section lists important switch features as well as technical specifications.
Features
Performance and Advanced Features
•
Three switching modes:
— Low latency cut through
— Store and corward
— Auto (Adaptive cut-through)
•
Enhanced bridging modes:
— Transparent bridging
— Source route switching
— Source route bridging (SRB)
— Source route transparent bridging (SRT)
•
Support for duplicate MAC address schemes
•
Automatic port sensing of operating mode and media speed
•
Multiple Token Ring port operation modes:
— Half-duplex concentrator and station
— Full-duplex concentrator and station (Dedicated Token Ring)
— RI/RO-like connection (SmartStack STS16-20R only)
•
Spanning tree protocol support on SmartStack STS16-20D for the designated
network ports 17–20 and on SmartStack STS16-20R for all the ports 1–20:
— IEEE 802.1D
— IBM Spanning Tree Protocol
On SmartStack STS16-20D the workstation ports 1–16 will always be in
forwarding state. They are not affected by the spanning tree protocol.
•
CrossLink high-speed inter-switch connection
— On SmartStack STS16-20D up to 128 Mbps using the network ports 17–
20. On SmartStack STS16-20D the workstation ports 1–16 do not support
CrossLinks.
