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Chapter 4
Introduction to the Cisco IOS
Gathering Basic Routing Information
The show version command will provide basic configuration for the system
hardware as well as the software version, the names and sources of config-
uration files, and the boot images:
Router#sh version
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-JS-L), Version 12.0(8),
RELEASE SOFTWARE (fc1)
Copyright (c) 1986-1999 by cisco Systems, Inc.
Compiled Mon 29-Nov-99 14:52 by kpma
Image text-base: 0x03051C3C, data-base: 0x00001000
The preceding section of output describes the Cisco IOS running on the
router. The following section describes the read-only memory (ROM) used,
which is used to boot the router.
ROM: System Bootstrap, Version 11.0(10c), SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version
11.0(10c), RELEASE SOFTWARE (fc1)
The next section shows how long the router has been running, how it was
restarted (if you see a "system restarted by bus-error," that is a very bad
thing) as well as where the Cisco IOS was loaded from, plus the IOS name.
Flash is the default:
RouterA uptime is 5 minutes
System restarted by power-on
System image file is "flash:c2500-js-l_120-8.bin"
And this next section displays the processor (a whopping 68030!), the
amount of DRAM and Flash memory, and the interfaces the POST test
found on the router:
cisco 2522 (68030) processor (revision N) with 14336K
/2048K bytes of memory.
Processor board ID 15662842, with hardware revision
00000003
Bridging software.
X.25 software, Version 3.0.0.
SuperLAT software (copyright 1990 by Meridian Technology
Corp).
Copyright ©2002 SYBEX, Inc., Alameda, CA
www.sybex.com