Understanding Tools and Options
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Nortel Networks ships the software image for AN/ANH and ARN routers on a
PCMCIA flash memory card, along with a default configuration file named
config. The ARN software image is named arn.exe. The AN/ANH software image
is named an.exe. Table 1 -1 describes the executable startup files contained in the
AN/ANH and ARN software images.
Startup Options
A router obtains the software image and configuration files that you want it to use
during startup.
Startup options allow AN/ANH and ARN routers to retrieve startup files either
over the network or from the file system stored in local flash memory. Obtaining
startup files from the router file system is called loc al booting. Obtaining one or
more startup files over the network is called network booting, or netbooting.
You use one of four boot options to complete a startup procedure. Table 1 -2
summarizes these startup options. “The Boot Process” on page1-5 describes how
local and network booting works.
For initial startup, AN/ANH and ARN routers are configured for a default option,
but you can change the default (see “Preparing for the Initial Startup” on
page 1-13). To select the startup option for routine operation, see “Selecting the
Routine Startup Option” on page1-16. To review the steps for configuring and
completing a startup option, see “Steps for Completing Startup Options”
page 1-18.
Table1-1. Router Startup Files
Startup File Name Description
krnl_arn.exe
ARN operating-system kernel
krnl_an.exe
AN/ANH operating-system kernel
Application files Executable files needed to perform the functions specified in the
configuration file. All application files have
.exe
file-name
extensions. (For example, the router needs an
ipx.exe
executable
file to run IPX.)
String files Compressed ASCII files needed when you use the Nortel Networks
Technician Interface to display the event log or MIB object names.
Groups of string files remain in compressed format until needed.