Network and Storage Protocols

nbt.nbss.network.error - what is tis

mdvillanueva

Hello Expert,

I am seeing quite alot of this:

nbt.nbss.network.error being suppressed. Is this a cause for concern?

Thanks,

Maico

6 REPLIES 6

chriszurich

I'm seeing the same error on many of my filers as well.  I'm running 8.1.1 7-Mode

Exact Error:

filer:ems.engine.suppressed:debug]:Event 'nbt.nbss.network.error' supressed 1 times in last 96 seconds.

mdvillanueva

I found out from Netapp that it is a bug and not yet resolved. They told me to just ignore it for now.

chriszurich

Found a possible root cause... NetBios (windows ports 137, 138 (UDP) and 139 (TCP) are used to NetBIOS over TCP. TCP445 is used for SMB over TCP.) being disabled and/or blocked on the domain controller. The fix is to disable NetBios and to reset the DC connection on the filer.

Reference / Source: http://sysadmin-dayindayout.blogspot.com/2009/04/netapp-errors-nbt-cannot-send-broadcast.html

mdvillanueva

disable netbios where?

chriszurich

The blog post mentions that in some environments NetBios is disabled on Domain Controllers.  This would lead to the filer making NetBios requests and not getting a response.  Check with your AD team to see if this is the case.  I will be checking shortly and will report back if this is the root cause.

mdvillanueva

I don’t know what type of effect disabling it would have when browsing using
servername<file:///
servername>

Please give us an update. Thanks.

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