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Command-Line Interface (CLI)

199

Gathering Basic Routing Information

The show version command will provide basic configuration for the system hardware as well

as the software version and the boot images. Here’s an example:

yourname#show version

Cisco IOS Software, 2800 Software (C2800NM-ADVSECURITYK9-M), Version

12.4(12), RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Compiled Fri 17-Nov-06 12:02 by prod_rel_team

The preceding section of output describes the Cisco IOS running on the router. The following

section describes the read-only memory (ROM) used to boot the router and hold the POST:

ROM: System Bootstrap, Version 12.4(13r)T, 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), where the Cisco IOS was

loaded from, and the IOS name. Flash is the default:

yourname uptime is 2 hours, 30 minutes

System returned to ROM by power-on

System restarted at 09:04:07 UTC Sat Aug 25 2007

System image file is "flash:c2800nm-advsecurityk9-mz.124-12.bin"

This next section displays the processor, the amount of DRAM and flash memory, and the

interfaces the POST found on the router:

[some output cut]

Cisco 2811 (revision 53.50) with 249856K/12288K bytes of memory.

Processor board ID FTX1049A1AB

2 FastEthernet interfaces

4 Serial(sync/async) interfaces

1 Virtual Private Network (VPN) Module

DRAM configuration is 64 bits wide with parity enabled.

239K bytes of non-volatile configuration memory.

62720K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

The configuration register value is listed last—it’s something I’ll cover in Chapter 5.

In addition, the show interfaces and show ip interface brief commands are very

useful in verifying and troubleshooting a router as well as network issues. These commands

are covered later in this chapter. Don’t miss it!

47020.book Page 199 Wednesday, January 2, 2008 4:31 PM

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