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Managing Cisco IOS Devices

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Objectives

Upon completing this lesson, you will beable to:

Manage IOS image files to maintain accessible IOSimages according to best practices, given operational

access layer switches, routers, and a TFTP server

Manage device configuration files to reduce devicedowntime according to best practices, given operationalaccess layer switches, routers, and a TFTP server

Execute an add, move, or change on a router, given a newnetwork requirement

Handle the troubleshooting process to minimize anypotentially adverse impact on Cisco devices

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Cisco IOS File System and Devices

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Managing Cisco IOS Images

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Back up current files prior to updating flash memory.

Creating a Software Image Backup

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Upgrading the Image from theNetwork

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Device Configuration Files

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Cisco IOS copy Command

NVRAM

Terminal

TFTP server

Erase start

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Cisco IOS copyCommand Example

interface s0ip address 10.1.1.1 255.255.255.0

interface e0ip address 10.2.2.2 255.255.255.0

interface e1no ip address

interface e0ip address 172.16.1.1 255.255.255.0

interface e1ip address 192.168.1.1 255.255.255.0

interface s0ip address 10.1.1.1 255.255.255.0

interface e0ip address 172.16.1.1 255.255.255.0

interface e1ip address 192.168.1.1 255.255.255.0

running-config TFTP Server saved.cfg

Resulting

running-config

copy tftp run (merged)

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copy run tftp andcopy tftp run Commands

wg_ro_a#copy running-config tftpAddress or name of remote host []? 10.1.1.1Destination filename [running-config]? wgroa.cfg.!!1684 bytes copied in 13.300 secs (129 bytes/sec)

wg_ro_a#copy tftp running-configAddress or name of remote host []? 10.1.1.1Source filename []? wgroa.cfgDestination filename [running-config]?Accessing tftp://10.1.1.1/wgroa.cfg...

Loading wgroa.cfg from 10.1.1.1 (via Ethernet0): ![OK - 1684/3072 bytes]

1684 bytes copied in 17.692 secs (99 bytes/sec)

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show and debug Commands

Processing characteristic

Processing load

Primary use

show

Static

Low overhead

Gather facts

debug

Dynamic

High overhead

Observe processes

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Commands Related to debug

Router(config)#service timestamps debug datetime msec

Router#show processesCPU utilization for five seconds: 0%/0%; one minute: 0%; five minutes: 0%

PID Q Ty PC Runtime(ms) Invoked uSecs Stacks TTY Process1 C sp 602F3AF0 0 1627 0 2600/3000 0 Load Meter2 L we 60C5BE00 4 136 29 5572/6000 0 CEF Scanner3 L st 602D90F8 1676 837 2002 5740/6000 0 Check heaps4 C we 602D08F8 0 1 0 5568/6000 0 Chunk Manager5 C we 602DF0E8 0 1 0 5592/6000 0 Pool Manager6 M st 60251E38 0 2 0 5560/6000 0 Timers

Router#no debug all

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Summary

The Cisco IOS File System feature provides a singleinterface to all the file systems that a router uses.

As your network grows, you may want to storeyour Cisco IOS software and configuration files ona central server, which would allow you to controlthe number and revision level of software imagesand configuration files you must maintain.

Device configuration files contain a set ofuser-configured commands that customize thefunctionality of your Cisco device.

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