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Community Member

3750 version mismatch

I added a new 3750 to my stack and I am getting a version mismatch error. The 2 original 3750's both had the same IOS version but my new one doesn't. Is there a way to copy the IOS from the master switch the the newly added switch. I also see a command about downward-compatibility. What does that do?

4 REPLIES

Re: 3750 version mismatch

You could use archive upload-sw to upload the existing image in stack to a TFTp server and then download that off to the new switch and then add to the stack.

What is the version number on the stack as well as on the new switch ?

Community Member

Re: 3750 version mismatch

What would this command do:

boot auto-copy-sw

Re: 3750 version mismatch

hi

About boot auto-copy-sw "boot auto-copy-sw global configuration command from the stack master to automatically upgrade switches in version-mismatch (VM) mode with the switch stack image "

About VM(Version Mismatch) "A switch in version-mismatch (VM) mode is a switch that has a different stack protocol version than the version on the switch stack. Switches in VM mode cannot join the switch stack. If the switch stack has an image that can be copied to a switch in VM mode, this command automatically copies the switch in VM mode with the image from another stack member. The switch then exits VM mode, reboots, and joins the switch stack"

hope this helps u out.

regds

Community Member

Re: 3750 version mismatch

Hi all no need to configure any thing at Master switch just renumber and give priority  to new switch accordingly  and stack the new switch then power it up it will take few mint to join the stack automatically

Note: remember and give priority need to be at config mode

that's what I have done for many 3750 switch stack

and also for 3850 as well but for 3850 have to apply the (software auto-configure ) command at master switch

 

before adding the new switch into stack

-3750-B1#sh  sw
Switch/Stack Mac Address : 0015.63d0.5880
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
 1       Member 0026.ca0b.3f80     1      0       Ready
 2       Member 0026.cb3e.9b00     1      0       Ready
 3       Member 0000.0000.0000     0      0       Provisioned
*4       Master 0015.63d0.5880     1      0       Ready
 5       Member 04fe.7f73.ad80     1      0       Ready

======================================================

After adding the new switch into stack

-3750-B1#sh  sw
Switch/Stack Mac Address : 0015.63d0.5880
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
 1       Member 0026.ca0b.3f80     1      0       Ready
 2       Member 0026.cb3e.9b00     1      0       Ready
 3       Member a40c.c370.aa00     1      0       Version Mismatch
*4       Master 0015.63d0.5880     1      0       Ready
 5       Member 04fe.7f73.ad80     1      0       Ready

 

===========================================================================

 

 wait for few mint

-3750-B1#sh sw
Switch/Stack Mac Address : 0015.63d0.5880
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
 1       Member 0026.ca0b.3f80     1      0       Ready
 2       Member 0026.cb3e.9b00     1      0       Ready
 3       Member 0000.0000.0000     0      0       Removed
*4       Master 0015.63d0.5880     1      0       Ready
 5       Member 04fe.7f73.ad80     1      0       Ready

 

 

=========================================================

it will start  Initializing

MEMI2-3750-B1#sh sw
Switch/Stack Mac Address : 0015.63d0.5880
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
 1       Member 0026.ca0b.3f80     1      0       Ready
 2       Member 0026.cb3e.9b00     1      0       Ready
 3       Member a40c.c370.aa00     1      0       Initializing
*4       Master 0015.63d0.5880     1      0       Ready
 5       Member 04fe.7f73.ad80     1      0       Ready

 

 

===============================================================

Finally the new switch will join automatically

-3750-B1#sh sw
Switch/Stack Mac Address : 0015.63d0.5880
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
 1       Member 0026.ca0b.3f80     1      0       Ready
 2       Member 0026.cb3e.9b00     1      0       Ready
 3       Member a40c.c370.aa00     1      0       Ready
*4       Master 0015.63d0.5880     1      0       Ready
 5       Member 04fe.7f73.ad80     1      0       Ready

 

 

================================================================================

 

Thanks hope it will help to solve you problem

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