Duplicate Addresses on Microsoft Failover Cluster Virtual Adapter

[ChrisV]

I am trying to set up a failover cluster on Windows Server 2008. The cluster
validation finds duplicate physical address and IP addresses (both V4 and V6)
on Local Area Connection* 8, which belongs to the Microsoft Failover Cluster
Virtual Adapter. Trying to create a 2-node cluster or adding the second node
to a single-node cluster fails with a timeout error message.

I also had the Teredo problem, which was solved by disabling the adapter.
But, of course, I must not disable the Failover Cluster Virtual Adapter (I
tried ...).

Any ideas how to solve this problem will be greatly appreciated.

[ChrisV]

I solved the problem, but do not really understand it completely yet.

The two servers both are clones of a VMware virtual machine. On one of them,
I removed, and then re-added the Failover Cluster Feature, and did not get
the "duplicate address" errors any longer. Obviously, all the addresses (MAC,
V4, V6) are set when adding the Failover Cluster Feature. Somehow, the system
seems to make sure that unique addresses are used.

Some questions remain:
Can it also happen to get this duplicate address error with "normal" servers
instead of clones?
Where does the cluster validation get the address information from? I could
not find it.
Can the addresses be changed "by hand"?

[Thierry Murail]

"ChrisV" <Chr...@discussions.microsoft.com> a écrit dans le message de news:
9E3F51ED-2FE3-4954...@microsoft.com...

>I solved the problem, but do not really understand it completely yet.
>
> The two servers both are clones of a VMware virtual machine. On one of
> them,
> I removed, and then re-added the Failover Cluster Feature, and did not get
> the "duplicate address" errors any longer. Obviously, all the addresses
> (MAC,
> V4, V6) are set when adding the Failover Cluster Feature. Somehow, the
> system
> seems to make sure that unique addresses are used.
>
> Some questions remain:
> Can it also happen to get this duplicate address error with "normal"
> servers
> instead of clones?
> Where does the cluster validation get the address information from? I
> could
> not find it.
> Can the addresses be changed "by hand"?

I got the same issue with 2 physical servers. Failover cluster creation
wizard try to assign the IP of the first server to the computer object
created with the name of the cluster. So cluster name can't be online.
Assigning a new, unique and static IP address to the cluster IP solve the
problem.