During the POST, the router executes
diagnostics to verify the basic operation of the CPU, memory, and interface circuitry.
After verifying the hardware functions, the router proceeds with software initialization,
during which it ?¬?nds and loads the Cisco IOS image, and then ?¬?nds and loads the
con?¬?guration ?¬?le, if one exists.
The following lists the steps required for the initial startup of a Cisco router:
Step 1 Before starting the router, verify the following:
??” All network cable connections are secure.
272 Chapter 4: LAN Connections
??”Your terminal is connected to the console port.
??”Your console terminal application, such as HyperTerminal, is selected.
Step 2 Push the power switch to ???On??? or plug in the device if there is no On/Off
switch.
Step 3 Observe the boot sequence and the Cisco IOS Software output on the
console.
Initial Setup of a Cisco Router
When the router starts up, it looks for a device con?¬?guration ?¬?le. If it does not ?¬?nd one, the
router executes a question-driven initial con?¬?guration routine, called ???setup.??? Setup is a
prompt-driven program that allows a minimal device con?¬?guration. After a router
completes the POST and loads a Cisco IOS image, it looks for a device con?¬?guration ?¬?le
in its NVRAM.
Pages:
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389