Cabletron Systems SmartStack STS16-20FRM, Инструкция по установке и эксплуатации

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Switch Overview SmartStack STS16-20RM/STS16-20FRM Token Ring Switches, P/N: 9032957-01
2. Switch Overview
The STS16-20RM and the STS16-20FRM are both IEEE 802.5-compliant devices
designed to boost throughput on Token Ring networks. They operate as a Media
Access Control (MAC)-layer device that is protocol independent.
This chapter describes how the switch operates as a single stand-alone unit. The
switch contains the following main elements:
•
Switching Bus—the architecture of the switch centers around the AXIS bus, a
520 Mbps switching fabric through which all switched ports communicate.
The AXIS bus is a partially asynchronous time division multiplexed bus used
for switching packets between heterogeneous LAN modules.
•
Token Ring Ports—each port can attach to a classical Token Ring segment or
to a dedicated station. Now users running basic applications are able to share
bandwidth, and users running bandwidth-intensive applications can receive
their own dedicated 16 Mbps port. Each dedicated port can also be set up in
full-duplex communication mode, so that each 16 Mbps port doubles to 32
Mbps.
•
SmartStack Interface Modules (SSIMs)—each switch supports two expansion/
uplink modules. These modules include RJ-45 or fiber ports to provide up to
eight additional 16 Mbps Token Ring ports. High-speed connections such as
155 Mbps ATM, 100 Mbps HSTR, and 100 Mbps Fast Ethernet provide
connections for servers or backbone connectivity.
•
Stack Link Module—the switch supports a stack link module that can be used
to connect two switches from the STS16-20RM series in a back-to-back
configuration. Alternatively, up to five switches can be connected together
using an internal stacker module, and up to eight switches can be connected
together using the external stacker unit and an additional switch stack unit. By
connecting switches together through the stack link module, the switches
virtually combine to form a single unit, providing scalability, simplified
management, and enhanced performance.