IOS upgrde procedure switch 3750g

[lerner cisco]

Hi,

I am looking few information on IOS upgradation for the switch   WS-C3750G-48TS-S . I loaded new Image on the flash and current flash and sh boot as below

Switch#sh flash

Directory of flash:/

    2  -rwx     8859636   Mar 1 1993 00:08:14 +00:00  c3750-ipservicesk9-mz.122-37.SE.bin

    3  -rwx         556   Mar 1 1993 00:02:38 +00:00  vlan.dat

    4  drwx          64   Jan 9 2012 03:17:56 +00:00  crashinfo_ext

    5  -rwx        5768  Apr 24 2013 04:25:28 +00:00  private-config.text

    6  -rwx        1048  Apr 24 2013 04:25:28 +00:00  multiple-fs

    9  drwx          64   Mar 1 1993 00:00:02 +00:00  crashinfo

   11  -rwx    16470273  Apr 23 2013 12:20:35 +00:00  c3750-ipservicesk9-mz.122-58.SE2.bin

   12  -rwx       26135  Apr 24 2013 04:25:28 +00:00  config.text

32514048 bytes total (6864384 bytes free)

Switch #sh boot

BOOT path-list      : flash:c3750-ipbase-mz.122-35.SE5/c3750-ipbase-mz.122-35.SE5.bin

Config file         : flash:/config.text

Private Config file : flash:/private-config.text

Enable Break        : no

Manual Boot         : no

HELPER path-list    :

Auto upgrade        : yes

Auto upgrade path   :

1) I would like to set  boot sytem parameter for the new IOS and secondary old IOS as well  is below command works??? if IOS not coming up with new one 12.2.58   is it boots with old  12.2-35 ??

   boot system flash:c3750-ipservicesk9-mz.122-58.SE2.bin;flash:c3750-ipbase-mz.122-35.SE5

2) If I set only  boot system flash:c3750-ipservicesk9-mz.122-58  ,  if new image corrput swicth will check valid image and boot up with old image ??

3) If switch went to room1 switch mode  and still I have valild running IOS c3750-ipservicesk9-mz.122-37.SE.bin  at flash memory, how to restore with old image

[Reza Sharifi · Accepted solution]

Hi,

On the 3750 series, you can only have one boot statement.  When you add a second statement, it will replace the first one.

You can test like this:

boot system flash:c3750-ipservicesk9-mz.122-58.SE2.bin

and then do a sh boot you should see  the above image.

If you change the boot statment to this:

boot system flash:c3750-ipbase-mz.122-35.SE5

and then do a sh boot you should see the new one.

So, you can just put in the first boot statment to boot from the new image.  If for what ever reason the IOS crashes, you can change the boot statement to the old one and reboot it.

HTH

[Leo Laohoo · Accepted solution]

boot system flash:c3750-ipservicesk9-mz.122-58.SE2.bin;flash:c3750-ipbase-mz.122-35.SE5

That won't work.  You can only set one boot statement.

AVOID, if possible, all sub-trains of IOS versions 12.2(58)SE, 15.0(1)SE and 15.0(2)SE.  Use 12.2(55)SE7 instead.

If you really require a feature only found in 12.2(58)SE-train, then use (at your own peril) IOS version 15.0(2)SE2.