Cisco PRP-1= Spezifikationen PDF herunterladen (Seite 4)

OL-17436-01

Product Overview

improved scalability, higher system memory, faster packet processing. Because PRP-3 does not support

Cisco IOS Software, the bootflash memory no longer exists in PRP-3. PRP-3 ROMMON has software

intelligence to download a Cisco IOS XR image without the support of bootflash memory.

Note PRP-3 supports Cisco XR 124xx (10 G per slot fabric) and Cisco XR 128xx (40 G per slot fabric) Router

chassis only. PRP-3 does not support Cisco XR 120xx Router chassis (2.5-G low-speed fabric).

PRP Functions

The PRP-2 provides the following additional functions:

• One IEEE 802.3 10/100/1000-megabits-per-second (Mbps) Ethernet port.

• Two building integrated timing system (BITS) ports for connecting to an external clock source.

Note BITS functionality is currently not supported.

In addition to the functionality listed for the PRP-1 and PRP-2, PRP-3 provides the following specific

functions:

• Reduced boot time.

• Increased overall scalability.

• Improved memory access rates and scale.

• Improved CPU performance through dual 1.3-GHz PPC processor cores.

• Improved packet processing using hardware-based acceleration.

• 10-G bandwidth backplane connectivity.

• Support for all Cisco XR 124xx and 128xx Router chassis, except low-speed fabric (2.5G).

• New ROMMON that supports IPv4 network configuration directly.

PRP Components

The PRP-2 contains the following additional components:

• SDRAM—Up to 4 GB of Cisco-approved synchronous dynamic random-access memory (SDRAM)

on two dual in-line memory modules (DIMMs). 1 GB of SDRAM is the default shipping

configuration. SDRAM is field replaceable only when using Cisco-approved DIMMs.

Note Software releases prior to 12.0(30)S do not recognize more than 2 GB of SDRAM and will only

use the first 2 GB of the installed memory. This does not affect the functioning of the PRP-2, but

commands such as show version will indicate that only 2 GB of SDRAM are installed.

• Hard disk drive—40-GB hard disk drive can be optionally installed on the PRP-2 board.

• CF—1-GB compact flash disk can be optionally installed on the PRP-2 board. It also provides

option to upgrade the compact flash to 4 GB.

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