Stack issue of 3750x switches

[mansuriadnan]

    I have a stack of 8 switches in which 1st switch is master with priority 15.

    8th switch is secondary with 14 priority.

    but when Switch 1 fails then by default secondary should become master

    but in my case it doesnt happens, the whole stack gets down.

    So pls help why switchover redundancy is not happening

[Leo Laohoo]

How did you fail-over to secondary?

I mean, what method did you use to fail-over?

[mansuriadnan]

Its on priority based.

What method means?

[Leo Laohoo]

What method means?

How did you made switch 1 fail?

[Joseph W. Doherty]

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Posting

Just wondering, does your original master have an IPService feature set license?  If so, does the intended secondary have it too?