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NetBIOS disabled but clusterlog full of "Netbios: Slow Operation"

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Hello,

I have a question about the cluster log:

Even if I have disabled NetBIOS on every NIC, I can see tousands of Netbios messages in the cluster.log...

0000225c.000014d4::2015/03/10-15:20:51.587 INFO  [RES] Network Name: Agent: Sending request Netname/RecheckConfig to NN:e16261d2-9f0c-4ea6-b914-997ff0a0ecba:Netbios
0000225c.000030c8::2015/03/10-15:20:51.587 INFO  [RES] Network Name: Agent: Sending request Netname/RecheckConfig to NN:8db455ab-38ba-461f-a492-a8fb3f01a8e1:Netbios
0000225c.00002574::2015/03/10-15:20:51.587 INFO  [RES] Network Name <CTEST1>: Netbios: Slow Operation, FinishWithReply: 0
0000225c.00000788::2015/03/10-15:20:51.587 INFO  [RES] Network Name <Cluster Name>: Netbios: Slow Operation, FinishWithReply: 0
0000225c.00002574::2015/03/10-15:20:51.587 INFO  [RES] Network Name:  [NN] got sync reply: 0
0000225c.00000788::2015/03/10-15:20:51.587 INFO  [RES] Network Name:  [NN] got sync reply: 0
0000225c.00002574::2015/03/10-15:20:51.587 INFO  [RES] Network Name <CTEST1>: Netbios: End of Slow Operation, state: Initialized/Idle, prevWorkState: Idle
0000225c.00000788::2015/03/10-15:20:51.587 INFO  [RES] Network Name <Cluster Name>: Netbios: End of Slow Operation, state: Initialized/Idle, prevWorkState: Idle

We disabled NetBIOS and LMHOSTS Lookup through the Properties GUI from the network adapters.

We're also using Windows NIC Teaming (lbfoadmin) on these systems.

Is this a normal behavior or do I have to configure some cluster specific parameters? 

Thanks in advance and best regards,

Ville


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