3750 stack switches ios upgrade

[hrafique1]

I am trying to do ios upgrade on 5 stacked 3750 switches. All the switches have different model number, so i am wondering which image file i should download. As far as i understand all the stacked switches should have the same IOS, i may be wrong. The switches have the following model numbers and SW images;

Switch   Ports  Model              SW Version              SW Image

------   -----  -----              ----------              ----------

     1   28     WS-C3750G-24PS     12.2(35)SE5             C3750-IPSERVICESK9-M

*    2   28     WS-C3750G-24PS     12.2(35)SE5             C3750-IPSERVICESK9-M

     3   52     WS-C3750G-48PS     12.2(35)SE5             C3750-IPSERVICESK9-M

     4   30     WS-C3750E-24PD     12.2(35)SE5             C3750E-UNIVERSAL-M

     5   30     WS-C3750E-24PD     12.2(35)SE5             C3750E-UNIVERSAL-M

Please advise which image file i should use as they all have different model numbers and Cisco provides different image files for each model. Please help,

Thanks

[joelgooding]

You do not need to break the stack. You can upgrade them both by putting the IOS on the master and setting the boot file for both switches to the new IOS. If you wish, you can copy the IOS from the master to the other stack members using:

copy flash: ios_file_name.bin  flash1:

As for the second question: you must boot the same image on all switches in the stack. Thats why its a stack - to logically represent one switch. Setting the master switch to use the new IOS to boot automatically points the other stack members to use that IOS as well. Please double check to see what the other stack members have as their boot file, if they have anything other than the master's IOS, please remove it or you will get errors when you boot.

Joel

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[hrafique1]

This takes me back to the original question as explained above that the IOS version has to be same( if you see my first comment IOS version is different on all the switches but IOS version is same). Hence the reason of doing upgrade separately .If the IOS image has to be same on all the stacked switches. How do i chose which image to use? On the basis of my original post how do i chose the image as its a mixture of 3750G and 3750E switches. If it is only one image which one will it be?

[hrafique1]

Also when i do show boot, on every stack member there is a different boot file. So i think they do not boot with the same image

[Leo Laohoo]

Also when i do show boot, on every stack member there is a different boot file. So i think they do not boot with the same image

They may all have different boot variables but if the files are not there then each switch stack member will boot the first file in their flash directory.

Use the configuration command "no boot system switch all" to clear out incorrect boot variables.