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New Member

2811 router - what files are really needed in flash?

We have a 2811 router. Using nearly all functions (VPN, CME, Firewall etc).

The flash is almost full, now using 12.4v3 IOS. I have to upgrade it to be able to use AnyConnect VPN and is thinking about ereasing all of the flash. However, what files will I need to add again?

I understand I will have to add the IOS bin file of course. Then I will need to add the SDM software (I assume I can let the setup.exe file solve what files to transfer). Then what about the "cme-basic-" file? This is one I can extract on the router, but do I need to? And if I need to - I assume I should erease the tar-file afterwards to save space.

I think I would have to load bin-files for our Cisco IP Phones too... or is that included in the cme-basic.tar file?

So far I have just upgaded the IOS bin file some times. On my last upgrade attemt I was out of space. The bin-files just get bigger for each new version. What can I do about that? Is there a way to get a bigger flash?

Many questions here, but if someone can help me out on parts if this it would be great!

Hall of Fame Super Silver

Re: 2811 router - what files are really needed in flash?


You do not tell us how much flash you currently have on your 2811 router so it is hard to know whether getting a larger flash is feasible. Many routers do have options for larger flash.

If you are using SDM I would be reluctant to delete the SDM files. I would start by deleting the current IOS image file which you will be replacing. I would also look for other files in flash that can be identified as not needed.



New Member

Re: 2811 router - what files are really needed in flash?

64MB flash

What about .tar-files? Shall they always be extracted in the router or just copy the whole file an "leave it" on the flash?

Super Bronze

Re: 2811 router - what files are really needed in flash?

What's probably best to be avoided, is an unnecessary TAR file and its extraction on the same flash. If the TAR can be used by the router without extracting the contents, using it would reduce the flash footprint.

Super Bronze

Re: 2811 router - what files are really needed in flash?

Agree with Rick, the easiest solution might be the need to delete all prior IOS image files before loading a new one. Many of the 2811s I've worked with don't have sufficient flash space for two full featured images.

Also, if you're using the new DOS like formatted flash, deleting individual files will release their space. No need to reformat/erase the whole flash or do a squeeze.

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