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Briggl
20 pts.
 NLB with CAS not working
CAS, Client Access Server Role, Exchange 2007, IIS, Network Load Balancing, NLB, Windows Server 2008
We have set up Network Load Balancing (NLB) on two Hub Transport/Client Access servers. (Windows Server 2008/Exchange Server 2007) When we go directly to either of the nodes, we can access OWA just fine. However, when we try to go to the new NLB cluster, by name or IP address, we get this: The page cannot be displayed The page you are looking for is currently unavailable. The NLB cluster name and IP are in DNS; nslookup works fine and we can ping it by name and IP address. What am I missing? We have followed several articles to the letter. They all have the same information and do not indicate the need for any additional configuration once the cluster is set up. Is there any configuration needed in IIS (or anywhere else) for this?

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ASKED: August 5, 2008  12:52 PM
UPDATED: July 12, 2010  11:15 PM
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Well, we got the NLB to work by connecting the second onboard NICs and setting it up as unicast. That's fine, but there is one configuration issue that doesn't match the instructions. The network settings for the NICs to be used for the NLB are supposed to be configured with IP address and subnet mask only, no gateway. However, we could not get it to work until we configured a gateway IP address on those NICs.
Last Wiki Answer Submitted:  August 6, 2008  8:37 pm  by  Briggl   20 pts.
All Answer Wiki Contributors:  Briggl   20 pts.
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no need to configure a gateway on those NICs (NLB ones), please read the following article from the Microsoft Enterprise Networking Team:

Balancing Act: Dual-NIC Configuration with Windows Server 2008 NLB Clusters

This should fix your problem!

Mdrewanz
 10 pts.