Figure 1-4 Performance Route Processor (Front Panel View, Horizontal Orientation Shown) - Cisco GSR12/60 - 12012 Router -AnyLAN, SONET/SDH Installation And Configuration Manual

Physical and Functional Overviews
Figure 1-2 shows the front panel view of the PRP.
Figure 1-4 Performance Route Processor (Front Panel View, Horizontal Orientation Shown)
The PRP is available as Product Number PRP-1=, which includes one PRP with 512 MB
of synchronous dynamic random-access memory (SDRAM) and one 64-MB advanced
technology attachment (ATA) Flash disk.
The primary functions of the PRP are as follows:
•
Downloading the Cisco IOS software to all of the installed line cards at power up
•
Providing a console (terminal) port for router configuration
•
Providing an auxiliary port for other external equipment (such as modems)
•
Providing two IEEE 802.3, 10/100-megabits-per-second (Mbps) Ethernet ports for
Telnet functionality
•
Running routing protocols
•
Building and distributing routing tables to line cards
•
Providing general system maintenance functions
•
Communicating with line cards either through the switch fabric or through the
maintenance bus (MBus)
The MBus connection allows the PRP to download a system bootstrap image, collect or
load diagnostic information, and perform general, internal system maintenance
operations. The switch fabric connection is the main data path for routing table
distribution as well as for packets that are sent between line cards and the PRP.
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ETH 0 ETH 1 AUX CONSOLE
PERFORMANCE ROUTE PROCESSOR 1 (PRP-1)