cisco 877 ios upgrade

Unanswered Question
Sep 8th, 2010

Hi All

Bit of a basic question but i cant find an idiot guide or this.

How do you do an IOS upgrade on the 877 ?

There is no boot command that i can find to tell it where to

boot from.

I will have to delete the previous IOS before i can put the new one

in - do i just do that and it just uses the IOS in the flash ?

Any help appreciated as i dont want to end up in rommon


I have this problem too.
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Todd Pula Wed, 09/08/2010 - 11:02

The 877 is limited on flash so it can only hold a single IOS image in most cases.  As you said, you will need to delete the existing image in order to store the new.  I tend to configure the boot system variable out of habit but the router should load the new image by default.


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