We have a production server Intel SC2600CP motherboard, with a core Server 2012R2 standard, setup with 3 Hyper-V VMs all with Server 2012R2. One is AD the other two are; one Sybase 12 application server and the other is SQL 2008 application server. This is a small office 15 Users, the Sybase is their main application product. we have NIC #1 tied to the management Server, NIC 2 is setup as a virtual switch shared between the three VM servers. The clients will get a SQL ODBC connection lost error, sometimes up to 10 times a day, they have to close and reopen the application, the event log on that Application server shows the below error. The two other VM's do not have this error in the event logs. I have a ping running from the AD to the Sybase Server IPV6 and when the even was recorded the ping timed out for 6 tries, then came back so TCP\IPV 4 and 6 dropped.
Network drivers are up to date as is the firmware, Server 2012 is to the latest updates.
Any body else having or solved this problem
Thanks
Log Name: System
Source: Microsoft-Windows-Hyper-V-Netvsc
Date: 9/24/2014 12:56:47 PM
Event ID: 14
Task Category: (1003)
Level: Information
Keywords:
User: N/A
Computer: DV-2012.
Description:
Miniport NIC 'Microsoft Hyper-V Network Adapter #2' network has changed
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Hyper-V-Netvsc" Guid="{152FBE4B-C7AD-4F68-BADA-A4FCC1464F6C}" />
<EventID>14</EventID>
<Version>0</Version>
<Level>4</Level>
<Task>1003</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000000</Keywords>
<TimeCreated SystemTime="2014-09-24T16:56:47.970324600Z" />
<EventRecordID>12354</EventRecordID>
<Correlation />
<Execution ProcessID="0" ThreadID="0" />
<Channel>System</Channel>
<Computer>DV-2012.</Computer>
<Security />
</System>
<EventData>
<Data Name="MiniportNameLen">36</Data>
<Data Name="MiniportName">Microsoft Hyper-V Network Adapter #2</Data>
</EventData>
</Event>