02-19-2009 06:52 AM - edited 03-06-2019 04:07 AM
Hello,
We have several Cisco 2960 switches and we have a problem after upgrading IOS.
We had : c2960-lanbasek9-mz.122-46.SE
No problem at all transfering IOS files with tftp
Now : c2960-lanbasek9-mz.122-46.SE
With this IOS, every transfer crash. Only a few bytes are transfering then everything stop. On the TFTP server we see the connection disrapering (so the switch stop downloading).
If I restart the switch in the original IOS, everything works.
Other question, can you tell me what's the purpose of the file named "multiple-fs" in the flash.
Thank you
Solved! Go to Solution.
02-19-2009 10:46 AM
is the same tftp server used in the lab as in the prod environment?
I would try to use a different tftp server (i.e. like your workstation) just to rule out the server.
02-19-2009 07:09 AM
Hi Jean,
Both of the posted IOS are the same. Also by every transfer crash, do you mean the switch actually crashes or the transfer times out?
rgds,
02-19-2009 07:17 AM
Sorry my mistake
Original IOS :c2960-lanbase-mz.122-35.SE5
Now : c2960-lanbasek9-mz.122-46.SE
The transfer just stop and nothing happens (I waited several minutes without seeing a time out).
02-19-2009 07:21 AM
have you checked to see if you have enough space to uplaod a new flash?
dir flash:
I ran into a similar problem last week with one of my 3560.
I also had to increase the line vty exec-timeout but that might not be your case.
02-19-2009 07:40 AM
hi again,
I checked and I have enough space (more than the double).
To add details, we upgaded the IOS because we needed crypto features.
I don't understand. I took a another 2960 spare switch and put the same IOS' and I don't have the problem...
02-19-2009 07:44 AM
Interesting fact. I'd open a TAC case if I were you. The problem seems to be isolated to that specific switch.
rgds,
02-19-2009 08:39 AM
Hello,
I think I have found the problem. The server running the tftp server is a windows with NIC Teaming and I think it's the problem. I removed the teaming and now the download from the switch works almost (now instead of crashing right at the begining it's crashing at ramdom % and I see CRC errors on the NIC of the server).
I'll continue investigating
02-19-2009 08:40 AM
I will check the settings on the switchport where the server is connected. You might have a duplex mismatch.
regards,
02-19-2009 09:10 AM
Seems to be ok for speed/duplex...
If I tranfer the IOS via tftp (UDP) it's always crashing during the download. But for some reason it works perfectly over HTTP (TCP).
Am I correct to assume that we have bad packets on the network and it works over HTTP because TCP retransfer failed packets ?
02-19-2009 09:12 AM
I am just confused cause it works on the spare switch.
02-19-2009 09:20 AM
the spare switch wasn't on the same network. It was in our lab
and it didn't work on all the switches in the same network
02-19-2009 09:25 AM
Can you upload from the switches to the tftp server without problem?
I would also span the server port just to see what is happening when you do your transfer.
02-19-2009 09:33 AM
yes, all tranfer from switches to the tftp server works.
Only problem is from tftp to switches.
And only with the new IOS...
02-19-2009 10:46 AM
is the same tftp server used in the lab as in the prod environment?
I would try to use a different tftp server (i.e. like your workstation) just to rule out the server.
02-20-2009 06:14 AM
no it wasn't the same tftp server.
I pretty sure the problem is the computer we are using as tftp server.
I will test that later
Thanks for your help
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