08-01-2022 09:10 AM
Hi
I have an old cisco Catalyst 3750G-12S-S Switch with IOS Ver: 12.2(55)SE4. I made a mistake and try to upgraded with 3750X-12S-S iOS . After I Format the Flash; I understood what a horrible mistake I made. Now I am trying to find suitable iOS for the switch but there is not anything found. Could anyone help me?
Solved! Go to Solution.
08-01-2022 04:18 PM
08-01-2022 04:18 PM
08-01-2022 08:07 PM
08-01-2022 08:52 PM
Yes, they are.
09-21-2022 02:02 PM
Doesn´t work :/, any idea?
09-21-2022 05:58 PM
@neysser wrote:
Doesn´t work :/, any idea?
It works. I know it works because I use it.
If it "doesn't work" provide proof. I want to see what does not work & where it is failing.
09-22-2022 06:45 AM - edited 09-22-2022 06:51 AM
I did it too,it doesnt work, you have any idea why this is hapening? i need a solution please, i tried a lot of things
09-22-2022 02:39 PM - edited 09-22-2022 03:36 PM
What you've posted is an error during the IOS xmodem copy to flash, correct? I.e. not a failure of switch to boot that IOS, correct?
However, as the -12S is different from all the other 3750G models, having more TCAM and additional SDM templates, I'm wondering if 3750v2 code fully supports it.
@Leo Laohoo have you run 3750v2 IOS, specifically, on a -12S model? Are the additional SDM templates provided?
09-22-2022 03:30 PM
Yes, i can´t do anything, the switch don´t boot, there isn´t show anything when put dir flash:, i tried to upload different images but nothing, i don´t know if is an error in the IOS or with the xmodem, o what, i did that in xshell, could be the program fail?
09-22-2022 03:49 PM
If available, you might try a different terminal emulator to xmodem with. Also try, if terminal emulator supports, xmodem vs. xmodem-1k.
I don't recall for sure, but if the 3750G supports tftp in its ROMMOM, that might allow you to directly boot from a tftp server or load an IOS image from it. (tftp would be much faster on a LAN than even the best serial port file transfer protocol, as the your console serial port, if set higher than its default 9.6K probably maxs out at 115 Kbps.)
09-22-2022 03:51 PM
Thank a lot man, i´ll do that
09-22-2022 03:49 PM
WTF are you talking about "not working".
The screenshot shows xmodem is failing and has NOTHING to do with the IOS.
xmodem failing means the computer doing the upload is the problem (and not the switch and, most definitely, not the IOS). Find another PC to do the xmodem process again.
09-22-2022 03:53 PM
Easy tigger, you think i haven´t tried? but thanks anyway
09-22-2022 04:13 PM
Ok, go back.
09-22-2022 05:08 PM
"Upload a smaller file. Get the switch to boot that. And then upload the correct firmware when possible."
Ha, a technique I've used to use in the past, when I was stuck doing a console IOS load. I.e. get the device to boot, then load the desired IOS across the LAN.
Leo's suggestion about an older IOS is good, as older IOS images, being less feature rich, often were smaller (well before universal versions with licensing controls). Likewise, look for the fewest features supported too. Basically, if multiple IOS images available, use the smallest possible.
Lastly, bumping up the baud rate of the serial interface can make a huge difference, although try to (very much) remember to restore to 9600 before you reboot. (I recall 3750s can be problematic restoring console to its default baud rate if you don't do this before the newly loaded IOS is booted.)
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide