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Updating cisco router ios

is the file extension of IOS image, it specifies the image is a Binary file.Let me fly-back through the naming with simple memorable representation, c1900-universalk9-mz. M4is, One more example using feature set notation What a fantastic nomenclature has been done by Cisco!

updating cisco router ios-16updating cisco router ios-80updating cisco router ios-75

Fundamentally it provides the area to execute commands to configure and administer the device.Now I’m gonna explain what you got from “show version” command From the figure, Basically the IOS is stored in router’s flash.“show flash” command displays the flash content including IOS image. Cisco routers are available in different series, a series is Platform or hardware architecture where IOS will run.This universal image offers all the Cisco IOS features including strong payload cryptography features such as IPSec VPN, SSL VPN, and Secure Unified Communications.‘k9’ refers to the inclusion of encryption support.I would like to upgrade to ‘c1841-advipservicesk9-mz.124-15.

T1.bin’ to support advanced IP and cryptographic services. Accessing tftp://

Sometimes Cisco may use special notation to represent Feature set. Type refers compression and IOS image run location. SSA This is the version number of IOS software image.

mz indicates image runs from RAM and image iz zip compressed. This 3 character designates digitally signed Cisco IOS software. Here the version is 151-4 Major Release: 15 Minor Release: 1 Feature Release: 4 Release type: M Rebuild number: 4 Represents additional release (Extended Maintenance) which supports some extra capabilities. T provides a comprehensive portfolio of over 2000 abilities, including the leading-edge functionality and hardware support (Standard Maintenance).

The upgrade process is almost similar to restore process; the only difference is we will stay in configuration mode instead of RMMON, since current IOS is running fine. I will be posting Backup Cisco Router Config (Cisco Running configuration backup) guide in my next article, we will also implement Cisco backup software using auto backup archive command.

Now decide to which IOS version to be upgraded, for this run ‘show flash’ command and note down the IOS image name. Hope this post was informative for you and I would request you to share this article, like our facebook page.

I completely understand this as their instructions are written for someone who is already familiar with Cisco routers and switches and who is probably already a Cisco CCNA.