A-7
Cisco 12404 Internet Router Installation and Configuration Guide
OL-11636-01
AppendixA Technical Specifications
Product Architecture
Gigabit Route Processor
This section provides an overview of the GRP (FigureA-2) and its use as the main
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
Figure A-2 Gigabit Route Processor
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.
SLOT-0
GIGABIT ROUTE PROCESSOR
SLOT-1
COLL
LINK
TX
RX
RJ-45
MII
RESET
AUX
CONSOLE
EJECT
57074