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Catalyst 2950 Xmodem I/O error message

Posted on 2004-08-24
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Last Modified: 2008-01-09
I have a catalyst 2950G that's had the flash file deleted. Since TFTP isn't an option now, I thought I could xmodem into the thing and download the IOS that way. Well each time I try, I get the following error message.

switch: copy xmodem: flash:c2950-i6k2l2q4-mz.121-13.EA1b.bin
Begin the Xmodem or Xmodem-1K transfer now...
CCCCCCCCCCBB0BB0xmodem:: I/O error

Any ideas ?
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Question by:swpa_wnt
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9 Comments
 
LVL 79

Expert Comment

by:lrmoore
ID: 11883683
Did you use the exact procedures in this document:
http://www.cisco.com/en/US/products/hw/switches/ps628/products_tech_note09186a0080169696.shtml

Are you sure you have a good copy of the .bin file? Yours could be corrupt...
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Author Comment

by:swpa_wnt
ID: 11884500
Yes I followed the suggested steps to the "T" however, I still got the same error message.  I also tried to tftp to the switch just for the heck of it and I got this error.

switch: copy tftp://10.40.1.253/c:/c2950-i6q4l2-mz.121-22.EA1.bin flash
tftp://10.40.1.253/c:/c2950-i6q4l2-mz.121-22.EA1.bin: permission denied

This is what I see when I do a "dir"

List of filesystems currently registered:

               flash[0]: (read-write)
              xmodem[1]: (read-only)
                null[2]: (read-write)
                  bs[3]: (read-only)

Finally, this is what I see when I power down and let the switch come up on it's own, without holding in the mode button.

modem file system is available.
Initializing Flash...
flashfs[0]: 2 files, 1 directories
flashfs[0]: 0 orphaned files, 0 orphaned directories
flashfs[0]: Total bytes: 7741440
flashfs[0]: Bytes used: 2560
flashfs[0]: Bytes available: 7738880
flashfs[0]: flashfs fsck took 4 seconds.
...done initializing flash.
Boot Sector Filesystem (bs:) installed, fsid: 3
Parameter Block Filesystem (pb:) installed, fsid: 4
Loading ""...: permission denied

Error loading ""

Interrupt within 5 seconds to abort boot process.
Boot process failed...

The system is unable to boot automatically.  The BOOT
environment variable needs to be set to a bootable
image.
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LVL 79

Expert Comment

by:lrmoore
ID: 11884851
What are you using for a TFTP server on the PC?
You don't need the "c:/" in the file.
Assuming that the .bin file is located in the tftp server root directory:

copy tftp://10.40.1.253/c2950-i6q4l2-mz.121-22.EA1.bin flash:
                                                                                  ^^^^ you need the destination..
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Author Comment

by:swpa_wnt
ID: 11885006
I'm using TFTPD32.exe by Ph Jounin.  The base directory on the tftp server is set to c:\ which is where my bin file is located. Destination as in ??? ( flash://ip of switch)  
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LVL 79

Expert Comment

by:lrmoore
ID: 11887815
Use the command excatly as I have it posted..
The destination is "flash:" meaning the local flash file on the switch. It knows this..

copy tftp://10.40.1.253/c2950-i6q4l2-mz.121-22.EA1.bin flash:

0
 

Expert Comment

by:mxrahman
ID: 12032386
I had identical problem: getting I/O error.
First I gave the command:
switch: copy xmodem: flash:c2950-i6k2l2q4-mz.121-13.EA1b.bin  
after pressing 'enter' as soon as you see CCCCC..   open the  the pull-down menu
at the top of the Hyperterm window, select Transfer, select the image file, then Send File.

That's how I got image on my 2924XL


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LVL 79

Expert Comment

by:lrmoore
ID: 12078642
Not until we have the resolution documented. If the author fixed the problem without using any of our suggestions, then the solution should be posted.
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ee_ai_construct earned 0 total points
ID: 12102354
Please read entire thread.  Asker solved or content important.
Closed, no points refunded.
ee_ai_construct (replacement part #xm34)
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