Additional Configuration and Maintenance Tasks

Bit 13 of the software configuration register determines the response of the system to a bootload failure. Setting bit 13 causes the system to load Cisco IOS software from Flash memory after five unsuccessful attempts to load a boot file from the network TFTP server. Clearing bit 13 causes the system to continue attempting to load a boot file from the network TFTP server indefinitely. Bit 13 in the software configuration register is set to 0 as the default at the factory.

Using Flash Disks in the PRP

Procedures for using Flash disks in the PRP are presented in the following sections:

About Flash Disks, page 61

Removing and Installing a Flash Disk in the PRP, page 62

Working with Flash Disks, page 64

About Flash Disks

ATA Flash disks are similar to linear Flash memory cards. Flash disks combine Flash memory technology with a controller chip to achieve higher capacity and better performance than linear Flash memory cards. The controller circuitry allows Flash disks to emulate hard disk capabilities, such as automatically mapping out bad blocks and block erasure. Flash disks also provide the capability to allocate noncontiguous sectors, eliminating the need for the squeeze command that is required for space retrieval on linear Flash memory cards.

Flash disks look similar to older Cisco 20-MB linear Flash memory cards. You can install a Flash disk into either Flash card slot on the PRP. Table 13 lists the Cisco product numbers for the Flash disks that are available for use with Cisco 12000 Series Routers.

 

 

Performance Route Processor Installation and Configuration Guide

 

 

 

 

 

 

OL-11656-01

 

 

61

 

 

 

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Cisco Systems PRP-1/R=, PRP-1=, PRP-2=, PRP-2/R= manual Using Flash Disks in the PRP, About Flash Disks