Installing a TAR image (15MB) on a 16MB Flash 3560-48PS

Jason Bee · ‎07-12-2016

Hi,

I was hoping someone could clarify if and how it is possible to do this. I have 3560-48PS with 16 megs of flash with the BIN (CLI only) currently installed. We want to get the TAR image on there that includes the GUI and the ability to use the CNA software to config it in the future. The latest TAR image is 15 megs (I think the BIN is around 12 megs IIRC). I understand that the bin is the binary bootable image, but I infer the TAR is an archive which means it needs unpacked. I would imagine this means it would take closer to 32 megs, at least until it is done unpacking and the TAR archive can be deleted? Is this correct? If so, is it possible to unpack the archive locally on my PC and TFTP the unpacked files over?

Or, can I keep the existing BIN (same version of the TAR I am trying to install) and just TFTP over the "html" directory? Can someone verify the command to send a directory through TFTP on CLI. IIRC you send a single file with "copy tftp flash:" but I don't know how to send a whole directory recursively.

Thank you

Leo Laohoo · ‎07-12-2016

The "highest" IOS a "plain", aka non-GigabitEthernet, 3560 can get to is 12.2(55)SE train.

From 12.2(58)SE (and higher ) requires 32 mb flash.

There is no room to store two (or more) complete IOS in a plain 3560/3750. Using CNA to configure 3560/3750 is just NOT a good idea.

Jason Bee · ‎07-12-2016

Sorry, I should have been more clear... I meant the latest for my particular model (16 meg), which you are correct Cisco lists as the 12.2(55).SE10. I do not want to store two ISO images, I just want to be able to install TAR for the purpose of getting web and CNA based monitoring and such. I am hoping if I don't have room to extract a TAR file that I could just TFPT the contents of the TAR I extract locally on my PC to the switch after I delete the existing BIN from flash (but before rebooting of course). Or even easier just TFTP the "html" directory assuming the BIN from the TAR is the same as the plain BIN.

Leo Laohoo · ‎07-12-2016

delete the existing BIN from flash (but before rebooting of course)

Delete the existing BIN file? And what happens if the switch reboots?

Finding there is no valid BIN file to boot, the switch immediately goes into ROMmon.

Jason Bee · ‎07-12-2016

This is essentially what the "overwrite" does when updating the BIN, it deletes the existing BIN to make room for the new BIN. If I wanted to switch BIN files and only have 16megs and the BIN image is 12megs how else could I install a new BIN without the old one being erased?

I appreciate the help, but I'm trying to determine if all that is needed to enable the web console is copying over the HTML directory from the TAR, and if so is there a way to do a recursive TFTP copy or another means of transferring it. Creating a tar archive of just "html" directory and unpacking on the switch is not an option because of the same space issues... there is just enough room for the unpacked files, not the archive and the unpacked files.

Leo Laohoo · ‎07-12-2016

This is essentially what the "overwrite" does when updating the BIN, it deletes the existing BIN to make room for the new BIN.

I am familiar with the "/overwrite" switch.

but I'm trying to determine if all that is needed to enable the web console is copying over the HTML directory from the TAR, and if so is there a way to do a recursive TFTP copy or another means of transferring it.

Not that I'm aware of.