Major Version Mismatch

[UARadiation]

We have a switch stack of two Catalyst 3750's and are trying to add a Catalyst 3750E.

One of the 3750's is the stack master.

Upon reloading the 3750E it prompts:

%STACKMGR-5-MAJOR_VERSION_MISMATCH: Major Version Mismatch (Local 6 - Received 1) with neighbor-1

and then elects itself the master because it did not join the existing stack.

I did some digging using the show platform stack-manager all command to find out that the 3750's have the stack version number 1.45 and the 3750E has 6.45. This would obviously confirms the mismatch but from what I have read if the systems have the IOS then this should not be an issue and all switches have 12.2(55)SE1.

I don't know if the IOS packages matter to resolve this issue but they are c3750-ipservicesk9-m and c3750e-universialk9npe-mz.

Hopefully this will be a simple fix so I can get the stack up and running quickly.

[mutiatadetutu]

Hi,

The ios you install on the stack switches must be exactly the same. If there is mismatch ios,then the switch with a different ios would not be part of the stack. You can use this ios (c3750-ipservicesk9-m) on all the switches and that should resolve the issue.

[mperezra1406 · Accepted solution]

Hello I have two switches with the same issue

Master WS-C3750X-24P-L - Firmware c3750e-ipbasek9-mz.150-2.SE8

Slave WS-C3750G-12S-S - Firmware c3750-ipbasek9-mz.122-55.SE10

I'm getting the error STACKMGR-5-MAJOR_VERSION_MISMATCH do you know what could be causing this issue?

[ranraju]

The stack would definitely come up if you have the same version and the feature set in all its member switches. But if you want to have a mixed feature set and mixed hardware then it would be best if you could go through the following link once.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_55_se/configuration/guide/swstack.html#wp1142379

Can you paste here the exact model numbers of the switches and the image that you are running in each of them.

Regards,

ranraju

[UARadiation]

The 3750s are:

WS-C3750G-24T-S(Stack Master)

WS-C3750G-24TS-S

They have C3750-IPServicesk9-m

The new switch is actually not a 3750E it's a WS-C3750X-24T-L V01

I must have confused the model with the IOS package because the package is C3750e-univeralk9npe-mz

I have read multiple times that article and I know that this will be a mixed hardware stack but I am unsure of mixed software because the naming convention is differnet between the old switches and the new one ie Ipservices vs. Universal.

Thank you.

[Leo Laohoo]

I must have confused the model with the IOS package because the package is C3750e-univeralk9npe-mz

Don't use the "universal" package if you are going to mix the stack with a plain 3750.  If you have IP Services then you need to downgrade the feature set accordingly.

[UARadiation]

So to clarify you are saying to downgrade both of the swtich IOS's to a IPBase package?

[tj.mitchell]

You need to run the same version of IOS on all the switches. You "universal" on the X series and a none "universal" on the other.

There's your issue.

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