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Getting Acquainted with the GRF 400
Overview of the GRF 400 base unit
Control board
GRF 400 control board hardware runs the router management software (RMS). RMS is the
communications and control software for the media cards. Other control board components are
the system RAM, internal flash memory, switch hardware, Ethernet connector, and PCMCIA
device slots. The control board is field-replaceable, but not hot swappable.
Switch control
Each media card is on a switch port. Switch control manages media card requests to connect
through the switch to the switch port occupied by a destination media card. Switch logic
determines if the target port is available and, if it is, enables the connection. A special bus
carries the request and grant traffic for available switch ports.
1-6October, 1998
A hardware reset button, receptacles for Ethernet and RS-232
PCMCIA
connections, and power, status and fault LEDs are on the control
B A
board's faceplate, shown left.
PCMCIA slots can contain an external flash memory device and a
PCMCIA modem attachment.
The system can be reset by depressing the reset button, but a
software command reset is preferable since it saves files and
leaves the system in order.
LEDs provide status for control board and chassis components.
RESET
POWER
The faceplate speaker functions as a typical PC speaker, it chimes
FAULT
during system boot, for example. The control board has another
STATUS
component that sounds an audible alarm when the operating
ACTIVE
temperature level is exceeded.
TRANSMIT
RECEIVE
The control board has temperature monitoring (sensor) and
PS1-OK
reporting (alarm) capabilities. The router management software
PS2-OK
provides a command (temp) to check the current board-surface
operating temperature. If excessive temperature levels are
reached, the router management software triggers the control
board's audible alarm. If levels are exceeded, the management
100/10
software will shut the system down. The management software
also monitors the power supply units, issuing power failure
warnings to the user interface via
are detected. The LEDs do not reflect the actual location of power
LINK OK
supplies in the chassis: power supply 2 is on top, power supply 1
100
is on the bottom.
XMT ACT
RCV ACT
A 10/100 megabit Ethernet receptacle (autosensing) supports a
connection to the administrative LAN. A set of four LEDs
•
•
indicate status (Link OK), activity (XMT ACT, RCV ACT), and
•
RS232
•
•
•
connection rate (if 100 Mbs).
COM1
•
•
•
TheVT-100 terminal attaches to the serial port.
if power problems
grconslog
GRF 400/1600 Getting Started - 1.4 Update 2
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