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SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide Introduction
— a connection to a shared-media segment via a Token Ring concentrator,
Station mode (on SmartStack STS16-20D only via the network ports
17– 20)
— a connection to another Token Ring switch (on SmartStack STS16-20D
only via network ports 17–20)
— operating at 4 Mbps or at 16 Mbps
— a connection to a dedicated-media segment, directly to a Token Ring LAN
station operating in half-duplex or full-duplex mode (Port mode).
— Ports 19 and 20 on SmartStack STS16-20R can attach to a MAU/CAU RI/
RO port
The switch will automatically configure (requiring no operator action) each port to
operate at the highest possible level of capability. No special crossover cables are
required for Token Ring stations on dedicated-media segments or for switch-to-
switch connections; the same straight-through cabling is used regardless of the type
of connection. This auto-sense/auto-configure capability of the switch can be
overridden by explicit console management.
Switched Port Analyzer
Any of the Token Ring ports can be configured as an analyzer port. An analyzer
port is used to monitor any of the other ports in the same physical switch. The
activity can then be traced by a Token-Ring network analyzer attached to the
analyzer port.
Reset Button
The SmartStack STS16-20D/STS16-20R has a recessed reset button labeled RST
that is located on the front panel. Pressing the reset button resets the hardware and
software and clears all tables and memory, including the address tables. Pressing
the reset button does not clear the values stored in nonvolatile random access
memory (NVRAM).
System Request Button
This unlabeled recessed button is located on the front panel above the Reset button.
Pressing the button causes the
System Request
Menu to appear on the console
device attached to the MANAGEMENT port. Pressing the button for more than
five seconds will initiate a modem download of the main image.
➽ Note:
The system request button should be used only at the direction of service
personnel. The button is recessed to prevent accidental activation.