Clustering 2 servers over a Wan - Automatic failover

Hi Guys,

We are looking for a solution for the following.

We have a server based at a clients site, its an  ML350, with internal storage, the server acts as a DC and exchange server. The server is critical for the clients daily activities.

We have been asked to provide a automatic failover solution over a wan. (20Meg up and down at each site)  We have an identical server based at a remote site.

If we run 2008 Server Enterprise can we cluster the two servers and internal storage over a wan? In the event of a server failure at the clients site could we automatically failover to the server at the remote site, and this be seemless to the client?

Any suggestions would be greatly appreicated?

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vmwarun - ArunCommented:
Domain Controllers cannot be clustered using Microsoft Clustering Services or Network Load Balancing since they work based on multi-master replication concepts.
A single DC can hold all the FSMO roles or each DC can hold a FSMO role depening on the domain setup.
The best way for setting up redundancy for Active Directory is to setup additional DCs in the site and enable them to hold 1 or 2 roles accordingly.
Please note that MS Clustering requires 2 NICs (1 Private NIC for Heartbeats) and the other one for cluster functionality.
Would you be using Site-to-Site VPN between the 2 sites ?
sfabsAuthor Commented:
Thanks for the info.

Yes we would be using Site-to-Site VPN between the 2 sites

Do you know of any 3rd party software that will allow a server to be replicated to remote site and automatically failover to this server in the event of a failure?
vmwarun - ArunCommented:
I am not certain whether the 3rd party software would help you to replicate as you are using Internal storage.
Clustering is possible only when Shared Storage is available.
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sfabsAuthor Commented:
We have started looking at XOsoft High Availability, which looks like it can replicated a server and offer automatic failover.

Any advice on this?
vmwarun - ArunCommented:
I have got no knowledge on this but it looks like a good product when I went through its features.
DoubleTake GeoCluster can help you with the replication part

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sfabsAuthor Commented:
One of a few software solution. A more expensive solution than we were hoping for. We also found other software solutions which came in cheaper but accept the software would have done the job required.
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Windows Server 2008

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