SQL 2005 server in Clustered Instance I find while system is restarted SQL server is not connecting due to VIA Network protocol

Posted on 2008-10-16
Last Modified: 2012-06-21
Cause for the  SQL Server failed to initialize VIA support library [QLVipl.dll]. This normally indicates the VIA support library does not exist or is corrupted. While troubleshooting found that problem is with the SQL Client Network protocol problem, where Ive to disable the VIA network protocol and restarted the SQL agent Service.

What would be the cause why this is happenning on SQL clustered synario in ACTIVE/PASSIVE ?
Question by:dharnet
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LVL 38

Assisted Solution

by:Jim P.
Jim P. earned 500 total points
ID: 22739983
"I went into that option SQL server Configuration Manager, in there under SQL Native Client Configuration are Client Protocols and in there should be VIA, right click and disable."


Author Comment

ID: 22742610
but what is the cause for SQL Server database engine could not start ? why SQL Server failed to initialize VIA support library [QLVipl.dll].  Why this problem comes on SQL clustered 2005 server.

and we need to disable VIA network protocol. Should we be concerned about this happening in the future or or was it a one-time incident?
LVL 38

Accepted Solution

Jim P. earned 500 total points
ID: 22742807
From the quick google I did, it seems that VIA support library is for the Virtual Interface Adapter (VIA) protocol works with VIA hardware.

The "The SQL Server failed to initialize VIA support library" from post ( here led me to the one I posted.

Another quick search gave me this as well "Error Messages of SQL Server 2005 Start Up Failure" (

That guy gets into serious detail, but the sounds of is basically that something in the registry got flipped by a SP or patch that turns it on by mistake. It should be a one time occurrence.

Author Comment

ID: 22760421
As you mentioned it is one time Occurance. I need again disable the VIA protocol and start sql agent to connect the SQL database.

Can you please suggest what is the permanent resolution SQL agent should not stop with VIA network protocol which is showing enabled even after i disballed mannually and restarted the SQL agent.

LVL 38

Assisted Solution

by:Jim P.
Jim P. earned 500 total points
ID: 22760876
Then probably what happened is that the configuration management didn't take across both nodes, or the SQL Server Browser service was not restarted on both nodes.

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