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Server 2012 R2 Network Keeps Dropping with Hyper-V Installed

Posted on 2014-09-19
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Last Modified: 2014-11-12
Setting up a new Hyper-V Server and I am running into an issue with the network connections.

12 NIcs all Broadcom NetExtreme Nics
HP Proliant DL560 Gen 8

I have the NICs separated in 4 teams using server 2012 r2 teaming
the OS team is currently only one enabled.
We are using IP4 only.

With Hyper-V not installed I am able to assign a static IP to the Teamed Nic connect to the internet ping resources etc...
When i install the hyper-v role thats when things get messy.  The NIc will connect for 30 seconds then the network will change from domain network to Public it will claim issues with the gateway and the DNS servers will not connect. All cables are connected properly and there are no issues with the switches as i have 20 plus other servers connected without any problems.  Looking for ideas to fix these network issues so i can continue configuring my VMs
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Question by:AFRITSupport
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12 Comments
 
LVL 58

Accepted Solution

by:
Cliff Galiher earned 500 total points
ID: 40333827
Broadcom strikes again. Make sure you have the latest drivers and NIC firmware. Disable TOE. If these are not 10G NICs, disable VMQ as well.
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Author Comment

by:AFRITSupport
ID: 40333842
awesome disabling VMQ did the trick that i will test and see if i need to disable TOE, unless you reccomend disabling TOE anyway and if i do should it be both ipv4 and ipv6?
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LVL 58

Expert Comment

by:Cliff Galiher
ID: 40333849
You'll get better performance with TOE disabled. Yes to disabling it on both v4 and v6.
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Author Comment

by:AFRITSupport
ID: 40333866
also should i disable the toe and vmq on the teams also?
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LVL 58

Expert Comment

by:Cliff Galiher
ID: 40333869
No need. The tam is a virtual adapter and both TOE and VMQ are physical constructs. The team will abide by the underlying settings on the physical adapters.
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Author Comment

by:AFRITSupport
ID: 40333886
ok what about disabling the toe for ipv4 and ipv6
0
 
LVL 58

Expert Comment

by:Cliff Galiher
ID: 40333888
I answered that above. Yes to both.
0
 

Author Comment

by:AFRITSupport
ID: 40333892
i disabled toe for ipv4 but left ipv6 it looks like the same issues are occuring again.
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Author Comment

by:AFRITSupport
ID: 40333893
i will try this now and let you know
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Author Comment

by:AFRITSupport
ID: 40337031
it still appears to be having the same issue and loses connectivity. not sure what else to do.
0
 

Assisted Solution

by:AFRITSupport
AFRITSupport earned 0 total points
ID: 40337675
OK as an update i believe i resolved the issue thanks to some research and your method. I downloaded the latest drivers from HP which is the same version on the broadcom site and also updated the firmware of the NICs.  This changed the adapters to HP NICs rather then broadcom. Now when i checked the configuration settings by default now the TOE and VMQ is disabled. Everything seems to be working as it should at the moment.
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Author Closing Comment

by:AFRITSupport
ID: 40347432
Figured out there was more than just disabling configuration settings
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