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NLB not balancing

I have a 3 Terminal server NLB Cluster. all machines are VMs (esx4.1) set in multicast mode.  I have a static arp record on the switch for the cluster MAC.

NLB manager shows all 3 as converged and no errors.  When I look at the cluster, I see 8 users on one server, 3 on the 2nd, and 0 on the third.

Not sure how to troubleshoot the connections, shouldnt it balance a bit more than that?
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Architect/Designer
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Commented:
to initially test, try turning two of the servers off and ensuring the other still works withot users noticing. try the same for all three servers to check they all work OK.

secondly, i'm not sure the static ARP records is needed, as the NLB should deal wwith all network traffic itself.
You also shouldnt really use multicast if you can avoid it, as unicast is better for NLB.

lastly, are you using single NICs in each server or multiple?
Microsoft load balancing recommends a NIC for admin traffic which allows the servers to communicte, and another for service traffic, like RDP.
This allows the system to corretcly assess each servers availability without service dataa getting in the way.

Try this for guidance:
http://support.microsoft.com/?id=243523

Author

Commented:
they are in multicast mode, so each server has 1 NIC.  as per vmware, these should be set to multicast if possible, so I followed that pest practice.

If I shutdown one of the servers, the users that should go to that server will be directed to one of the others I assume?
SteveArchitect/Designer
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Commented:
Thats what we need to test. if users are not redirected peoperly then the clustering isnt working properly.

Are these clustered TSs on the same VM host?

Author

Commented:
no, they are on 3 different hosts.
SteveArchitect/Designer
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Commented:
nice one.
Check your cluster as advised above and let us know how it goes.

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