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Webcast-Catalyst9k
New Member

How to upgrade the IOS in the router

How to upgrade the IOS 12.2 version to 12.4 in the cisco router without affecting existing configuration..

4 REPLIES

Re: How to upgrade the IOS in the router

usually configuration is not affected in the process. unless new IOS doe snot support come of the existing features and therefore those lines will disappear.

either way, I am afraid you would to reload the routes so it loads the new image. if it is 1st time in production, I suggest you test the IOS and make sure it does what it says on the tin.

What do u need to upgrade?

1-IOS image

2-tftp server to store image.

3-you also need to set router to boot from new IOS, then OLD one if storage allows ( in case you need to rollback).

4-make sure router can reach tfp server and path to image is correct.

main command is copy tftp flash, or copy tftp bootflash depending on platform and image location in router.

This task is relatively very simple, however it requires preparation and heavy testing.

http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00801347e2.shtml

Pls rate all helpful posts.

Sam

New Member

Re: How to upgrade the IOS in the router

how to set router to boot from new IOS

Re: How to upgrade the IOS in the router

The command depends on the type of router that you are using. refer this link for configuration help. You will have to manuaaly specify the location of ios for next-reloads.

http://www.cisco.com/en/US/docs/ios/11_3/configfun/command/reference/frreboot.html#wp15669

Re: How to upgrade the IOS in the router

also, make sure confreg is set correctly, else boot selection will be bypassed.

veriffy confreg

TST-POP1-NPE01#sh ver | inc register

if different from 2102 , correct it as per below.

TST-POP1-NPE01(config)#config-register 0x2102

HTH

Sam

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