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Cisco 12000 Series Internet Router Configuration Guide for Cisco IOS Release 12.0S
Chapter 2 Basic Configuration of the Cisco 12000 Series Internet Router
PCMCIA Flash Memory Tasks
NSF allows data packets to continue forwarding along known routes while the routing protocol
information is being restored following a switchover. With NSF, peer networking devices do not
experience routing flaps. Data traffic is forwarded through intelligent line cards or dual forwarding
processors (FPs) while the standby RP assumes control from the failed active RP during a switchover.
The ability of line cards and FPs to remain up through a switchover and to be kept current with the
Forwarding Information Base (FIB) on the active RP is key to NSF operation.
For information about the SSO feature, refer to this url:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s22/sso
120s.htm
For more information about Cisco NSF, refer to the Cisco Nonstop Forwarding document at the
following location:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s22/nsf
120s.htm
PCMCIA Flash Memory Tasks
The linear Flash memory card or Flash disk that shipped with your router contains the default Cisco IOS
software image you need to boot your router. Flash disks provide higher capacity and better performance
than linear Flash memory cards, but otherwise they function almost the same. When using a linear Flash
memory card, the Cisco IOS command to identify and access the card is slot0: or slot1:, depending on
the PCMCIA slot in use. When using a Flash disk, those commands are replaced with disk0: or disk1:.
Note Use only Type I or Type II Flash memory cards.
The following sections describe common software tasks that involve Flash memory cards and Flash
disks.
• Formatting a Flash Memory Card or Flash Disk, page 2-11
• Booting from Flash Memory, page 2-12
• Manipulating Files on a Flash Memory Card or Flash Disk, page 2-13
Note For information regarding available Flash memory cards and Flash disks, and how to install them into
the RP on your router, refer to the installation and configuration guide available for your
Cisco 12000 Series Internet Router.
Formatting a Flash Memory Card or Flash Disk
Before you can use a new Flash memory card or Flash disk, you must format it.
Caution The procedure erases all information on a Flash memory card. To prevent the loss of important data that
might be stored on a Flash memory card, proceed carefully. If you want to save the data contained on a
Flash memory card, copy the data to a server before you format the card.
To format a new Flash memory card or Flash disk in the RP, follow these steps:
