Cisco Router User Interface
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the Cisco IOS from Flash memory, if a file is present. (Flash memory is an
electronically erasable programmable read-only memory [EEPROM].) The
IOS then proceeds to load and then look for a valid configuration--the startup-
config--that's stored by default in nonvolatile RAM (NVRAM).
The following messages appear when a router is first booted or reloaded:
System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)
Copyright (c) 2000 by cisco Systems, Inc.
C2600 platform with 32768 Kbytes of main memory
The first part, shown above, is the information about the bootstrap pro-
gram, which first runs the POST and then tells the router how to load, which
by default is to find the IOS in Flash memory.
The next part, shown below, shows the IOS is being decompressed into
RAM. This does not happen the same way for all routers, but for the 2600
router in this example, the IOS is loaded into RAM. The 2500 series router
runs the IOS from Flash memory and does not load the IOS into RAM.
program load complete, entry point: 0x80008000, size:
0x43b7fc
Self decompressing the image :
##########################################################
##########################################################
##########################################################
##########################################################
##########################################################
##########################################################
##########################################################
##########################################################
################################### [OK]
After the IOS is decompressed into RAM, the IOS is then loaded and
starts running the router, as shown below. Notice the IOS version is stated
as version 12.1(8).
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-I-M), Version 12.1(8),
RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2001 by cisco Systems, Inc.
Compiled Tue 17-Apr-01 04:55 by kellythw
Image text-base: 0x80008088, data-base: 0x8080853C
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