Cluster validation passes with an error – duplicate IP address found ?

If you face an similar issue during your validation test of your failover cluster this could be also related to the Teredo IPv6 tunnel adapter. Teredo allow IPv6 communication to pass trough IPv4 NATs and IPv4 servers. In that case Teredo gives the same IPv6 address to his network interfaces which the validation tests of course flags as an error.

If you don’t use/require IPv6 you can find here detailed information’s how to disable Teredo :

The commands to disable the Teredo adapter via the CLI is :




               set state disabled



In addition to the article below you need to disable to Teredo network interface via the device manager. To do that go to device manager –> View “Show hidden devices” –> Network Adapters –> Teredo Tunneling Pseudo-Interface –> right click “disable”


Hope this helps to progress with your clustering…. 😉

FC rocks…

Any further thoughts? Let me know here

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: