Cisco 12404 Installation And Configuration Manual page 259

Appendix A Technical Specifications
Gigabit Route Processor
Figure A-2 Gigabit Route Processor
OL-11636-01
This section provides an overview of the GRP
system processor for the Cisco 12404 Internet router.
This section provides information on the following GRP functionality.
GRP memory
•
System status LEDs
•
Soft reset switch
•
PCMCIA slots
•
Asynchronous serial ports
•
The following are primary functions of the GRP.
Loading the Cisco IOS software to all of the installed line cards at power on
•
• Providing a console (terminal) port for router configuration
Providing an auxiliary port for other external equipment (such as modems)
•
Providing an IEEE 802.3, 10/100-megabit-per-second (Mbps) Ethernet port
•
for Telnet functionality
Running routing protocols
•
Building and distributing routing tables to the line cards
•
Providing general system maintenance functions for the router
•
The GRP communicates with the line cards either through the CSF or through the
maintenance bus (MBus). The CSF connection is the main data path for routing
table distribution as well as for packets that are sent between the line cards and
the GRP.
Cisco 12404 Internet Router Installation and Configuration Guide
Product Architecture
(Figure A-2) and its use as the main
GIGABIT ROUTE PROCESSOR
A-7