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Performance Route Processor Installation and Configuration Guide
OL-11656-01
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.