Sources of Cisco IOS Software
Cisco 12008 Gigabit Switch Router Installation and Configuration Guide
4-2
This chapter will help you to
•Configure your router so that it can access the network
•Enable other hosts in the network to remotely access your system by means of a Telnet
connection
Detailed configuration procedures for all of the line cards and network interfaces that you
can install in your Cisco 12008 are beyond the scope of this document. Such information
can be found in the configuration publications listed in the later section entitled “If You
Need More Configuration Information.” In particular, for the Cisco 12000 series line
card(s), you can refer to the configuration note(s) that shipped with your system.
Sources of Cisco IOS Software
A default Cisco IOS software image for your Cisco 12008 is available through any one of
the following internal/external sources:
•Onboard Flash memory single inline memory module (SIMM) on the Route Processor
(RP)—The latest Cisco IOS software image is pre-loaded into the Flash memory SIMM
at the factory prior to router shipment. The Flash memory SIMM is also referred to as
nonvolatile random access memory (NVRAM). This type of memory retains its
contents when system power is turned off.
•Flash memory card—A Flash memory card inserted in a Personal Computer Memory
Card Industry Association (PCMCIA) slot on the RP can serve as an external storage
medium for a default Cisco IOS software image .
•TFTP server—A Trivial File Transfer Protocol (TFTP) server in the network can also
function as an external source of a default Cisco IOS software image. A valid Cisco IOS
software image can be downloaded from such a remote host by means of a Telnet
connection.