Changing IOS on 3750

Answered Question
Mar 9th, 2009

I currenly have the following:


Cisco IOS Software, C3750 Software (C3750-IPBASE-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)

118784K/12280K bytes of memory.

I want/need to change IOS to:


When I attempt to copy the 8,436 KB, the upload quits. On the 3750 error states" Error Received from peer: Session terminated. Error form TFTP server (3CDaemon) states at 6353920, "Error received from peer: Session terminated." Appears to always terminated at 6353920. Couple of times it stopped at lower Bytes. I have tried to load on two different switches. Had no problem changing IOS on my 28 3560's. Also attempted to load over two different networks.


I have this problem too.
1 vote
Correct Answer by George Thomas about 7 years 9 months ago


Please rate post.

Correct Answer by George Thomas about 7 years 9 months ago

Excellent. Good luck on the upgrade.

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Overall Rating: 5 (2 ratings)
ciscopatmcnamara Mon, 03/09/2009 - 13:25

Thanks G,

It appears that that may be the issue. I did not want to delete the current IOS, but it appears that is not an option.

Directory of flash:/

3 -rwx 5 Mar 1 1993 00:37:09 +00:00 private-config.text

4 -rwx 935 Mar 1 1993 00:37:09 +00:00 config.text

6 drwx 192 Mar 1 1993 00:15:47 +00:00 c3750-ipbase-mz.122-35.SE5

15998976 bytes total (6369792 bytes free)

ciscopatmcnamara Wed, 03/11/2009 - 06:07

I mistakenly rebooted the 3750 after I deleted the IOS........Now I am having trouble reloading an IOS. I would like to load the following: c3750-pservicesk9-mz.122-35.SE5.bin

I am using HyperACCESS to connect to the switch with a roolover cable.

My last attempt gave me the following:

switch: copy xmodem: flash:c3750-ipservicesk9-mz.122-35.SE5.bin

Begin the Xmodem or Xmodem-1K transfer now...

CCCCCCCCCCBB0BB0xmodem:: I/O error

Please start form the begining. This is my current switch prompt:


adamclarkuk_2 Wed, 03/11/2009 - 06:55


Check your serial connection settings, they should be

Bits per second: 9600

Data bits: 8

Parity: None

Stop bits: 1

Flow control: None

Enter the following commands :-



Copy the IOS again via xmodem

boot flash:c3750-pservicesk9-mz.122-35.SE5.bin


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