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Need help in backing up the IOS on 3550 switch.

danlai2004danlai2004 Member Posts: 21 ■□□□□□□□□□
Dear guys,
i am trying to install a different IOS to my 3550 switch as a practice, but before the installation, i would like to try to back up the current IOS to my TFTP server as a back up, since i am a very beginner of using Cisco switch, i got the following problem that need help.

1. i failed "copy flash tftp: or "archive upload-sw tftp" to back up the current running IOS to my TFTP server. below is the show flash result.

Switch#sh flash

Directory of flash:/

7 drwx 192 Mar 01 1993 00:03:08 c3550-i9q3l2-mz.121-11.EA1

15998976 bytes total (11623936 bytes free)
Switch#

2. as above, c3550-i9q3l2-mz.121-11.EA1 is currently the IOS running in my 3550, but why is
the size so small (only 192 ??) comparing to the IOS that i am going to install to it ?
is this really a IOS or is it the bootup ? since the IOS i am going to install is around 6M in size.

3. what should i do in order that i could copy the current IOS to my TFTP Server as backup?

4. what command should i type in order to download the new IOS to my 3550 swtich from my TFTP server ? is it as simple as "copy tftp flash" and "archive download-sw flash" ??

Thanks Guys !!

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    danlai2004danlai2004 Member Posts: 21 ■□□□□□□□□□
    below is my show ver.

    Switch#sh ver
    Cisco Internetwork Operating System Software
    IOS (tm) C3550 Software (C3550-I9Q3L2-M), Version 12.1(11)EA1, RELEASE SOFTWARE
    (fc1)
    Copyright (c) 1986-2002 by cisco Systems, Inc.
    Compiled Wed 28-Aug-02 09:33 by antonino
    Image text-base: 0x00003000, data-base: 0x005C6390

    ROM: Bootstrap program is C3550 boot loader

    Switch uptime is 2 hours, 19 minutes
    System returned to ROM by power-on
    System image file is "flash:/c3550-i9q3l2-mz.121-11.EA1/c3550-i9q3l2-mz.121-11.E
    A1.bin"

    cisco WS-C3550-24 (PowerPC) processor (revision G0) with 65526K/8192K bytes of m
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    mikej412mikej412 Member Posts: 10,086 ■■■■■■■■■■
    :mike: Cisco Certifications -- Collect the Entire Set!
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