Cisco Systems Cisco uBR10012 Performance Routing Engine, LCD Cable, PRE Modules and PRE1 Modules

Chapter 1 Cisco uBR10012 Universal Broadband Router Overview

Cisco uBR10012 Universal Broadband Router Modules

LCD Cable

The LCD ribbon cable connects the LCD module to the backplane. The folded end is connected to the LCD module. See Figure 1-9.

Figure 1-9 LCD Cable

LCD module
end	Back plane
	end
Fold	62395

Performance Routing Engine

There are four models of PREs, the original PRE module that was initially shipped with the

Cisco uBR10012 router, the PRE1 module that began shipping with Cisco IOS Release 12.2(4)XF, the PRE2 module that is shipping with Cisco IOS Release 12.3(9)BC, and the PRE4 module that is shipping with Cisco IOS Release 12.2(33)SB.

•PRE1 functionality was introduced in Cisco IOS Release 12.2(4)XF.

•PRE2 functionality was introduced in Cisco IOS Release 12.3(9a)BC.

•PRE4 functionality was introduced in Cisco IOS Release 12.2(33)SCB.

You can use the CLI show version command to determine whether a PRE, PRE1, PRE2, or PRE4 module is installed in your system.

Note The PRE3 is not supported on the Cisco uBR10012 router

The PRE is a single-slot module used with the Cisco uBR10012 routers. The PRE performs all Layer 2 and Layer 3 packet routing and forwarding using an advanced parallel processing architecture called Parallel eXpress Forwarding (PXF). This process separates the control plane from the data plane. The PXF architecture supports high-performance throughput with IP services enabled on every port.

Note When replacing a PRE1 module with a PRE2 module, you must also install EMI gaskets and RF absorber material. For more information, go to the following URL:

http://www.cisco.com/en/US/docs/cable/cmts/ubr10012/installation/field_replaceable_units/pre2gkit.h tml

PRE Modules and PRE1 Modules

PRE1 modules support error checking and correction (ECC) for all onboard memory, replacing the simpler parity error algorithm of the original PRE module. A general-purpose RISC processor (262–300 MHz MIPS RISCMark RM7000) support highperformance Layer 3 forwarding of traffic. The

Cisco uBR10012 Universal Broadband Router Hardware Installation Guide

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