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Broadcom NIC Teaming avec Hyper-V R2

ayi

I have read a few contradictory articles regarding support or at least configuration with teaming of Broadcom NIC's and Hyper-V. I have a pair of Dell R805's with 4 Broadcom 5708 NIC's in them. I have teamed them up (one team for public connections and one for private connections) and I have installed Hyper-V. I am getting some intermittent connection issues though and I'm concerned that it might be due to the teaming. Basically I am wondering if anyone has successfully setup NIC teaming in the parent partition and used the teamed adapters through the Hyper-V switch. If so, what is the configuration/proper steps that you used to configure this. I have the server running Windows Server 2008 R2. Right now the server is in test mode, but my concern is that we won't see any issues until we move it into production and get some heavy traffic on the ports.

ayi

I have built 3 clusters using 3 Dell R805's and a Dell MD3000i SAN connected to one switch and had similar issues to what people are saying here. The fix was to disable "IPv4 Large Send Offload". Since doing this all clusters and 40 VM's have not missed a beat. (4 months now).

"Large Send Offload (LSO) is a feature provided by Broadcom network adapters that prevents an upper level protocol such as TCP from breaking a large data packet into a series of smaller packets with headers appended to them. The protocol stack need only generate a single header for a data packet as large as 64 KB, and the adapter hardware breaks the data buffer into appropriately-sized Ethernet frames with the correctly sequenced header (based on the single header originally provided)."

Below is a link to the full article.
http://www.sadikhov.com/forum/index.php?showtopic=132434