The transition to NetApp MS Azure AD B2C is complete. If you missed the pre-registration, you will be invited to reigister at next log in.
Please note that access to your NetApp data may take up to 1 hour.
To learn more, read the FAQ and watch the video.
Need assistance? Complete this form and select “Registration Issue” as the Feedback Category.

Active IQ Unified Manager Discussions

NetBackup MC Login Error


This could be an easy one to resolve and I'm sure I've seen it before but just cannot remember what we did to resole.


When I try to log in I'm getting an error:

" No buffer space available (maximum connections reached?): connect"


Can anyone please suggest a resolution for this? Thanks.



It tunrs out that this is down to a known bug with Microsoft Server 2008 R2.


Kernel sockets leak on a multi-processor computer running Windows Server 2008 R2.


An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.

Specifically, the application may be unable to create new sockets and a "no buffer space available" or "insufficient buffer space" exception occurs on the computer. Additionally, when this issue occurs users cannot remotely connect to the computer until it is restarted.

This issue occurs because of a race condition in the Ancillary Function Driver for WinSock (Afd.sys) that causes sockets to be leaked. With time, the issue that is described in the "Symptoms" section occurs if all available socket resources are exhausted.

Applying the following hotfix resolved the issue.

NetApp on Discord Image

We're on Discord, are you?

Live Chat, Watch Parties, and More!

Explore Banner

Meet Explore, NetApp’s digital sales platform

Engage digitally throughout the sales process, from product discovery to configuration, and handle all your post-purchase needs.

NetApp Insights to Action
I2A Banner