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FSMO Backup Server

Hi all,

Is it possible to have a backup FSMO server incase our original FSMO server goes down? I have one windows 2000/2003 domain with 10 DCs.

Thanks,

Dean
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DeanUnited
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DeanUnited
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2 Solutions
 
Lee W, MVPTechnology and Business Process AdvisorCommented:
Why 10 DCs?  How many DCs per site?

No, only ONE FSMO Master for each role.  If a server fails, the others can TYPICALLY keep going until you restore it - if you can't restore it, you seize control of the FSMO role(s) from another server.
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DeanUnitedAuthor Commented:
Okay thanks, We'll have to seize the role .

We have 200 clients in one site. we are reducing our DCs now down to 5 or so. Too mainy before.
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CGretskiCommented:
Any DC can seize the FSMO roles if the server with them on dies.
Most of the roles aren't critically important for daily use - the exception being PDC emulator, which is important for password changes and replication - but only if you have NT4/9X clients or NT4 servers respectively.

Thankfully PDC is one role that even if you seize, you can restore the original server without permanent damage to the AD ( just confuses passwords for a few days)

How often are you changing the AD - changing structure or adding/removing members -- if you're AD just sit's there allowing logons & dealing with password changes then even if your FSMO roles are unavailable for weeks (with the above exception) it shouldn't cause you many problems.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
5 is TOO many too.  One site of 200 clients only needs 2 DCs.  And one DC would be FAR more than enough - if you didn't want redundancy (which I don't recommend). I had 3 DCs handling 600 Windows clients in 2 sites and NEVER had a problem with performance - we often through a few file shares on them for "less important" items as well, they were SO underutilized.

2DCs and make them both Global Catalogs.  Done.
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CGretskiCommented:
Beware of the FSMO Infrastructure master.... it doesn't play well with global catalog being on the same server UNLESS ALL your DCs are GCs
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Lee W, MVPTechnology and Business Process AdvisorCommented:
CGretski - can you post supporting links to that statement?  What happens, etc?
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CGretskiCommented:
which statement? PDC or infrastructure?
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Ok, I remember that now.  Good to point out.  But I stand by my first statement - which still holds true:
2DCs and make them both Global Catalogs.  Done.
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DeanUnitedAuthor Commented:
we have 10 branches all high speed connected so there is no issue with replication. You could say we should have them all in different sites I suppose.  In case of a problem with one or two of our branches going down we thought we'd keep 4 DC/GC..
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