>I have a Dell PowerEdge 2900 2 x 2.5Ghz Quad Core, 16GB RAM, and 2 x
>Broadcom
> NIC's (pre-installed). Hyper-V Server Core 2008 x64 is running on the Host
> and I updated the Broadcom drivers manually on the server core to latest
> from
> Dell.
>
> NIC 1 - 192.168.0.40 - (Broadcom BCM5708C NetXtreme II GigE NDIS VBD
> Client)
> Dedicated to Management (No Virtual Network)
> NIC 2 - 192.168.0.41 (BCM5708#2-LAN-02) Dedicated to Virtual Machines
>
> From any Windows 2003 Server (Hardware, not virtual), file transfers from
> 192.168.0.41\c$ are very fast while file transfers from 192.168.0.40\c$
> are
> very slow. Fast = 350Mb < 2 minutes, Slow 350Mb > 100 minutes.
>
> All Management features work perfectly on either interface, and data
> transfers from Windows Vista x32 SP1 are very fast on both of the Hyper-V
> Server NIC interfaces. Problem seems to be related to data transfers from
> a
> Windows 2003 R2 SP2 machine.
>
> Originally I was using primary NIC as host for VM's, but network transfer
> speed of VM was also extremly slow until I changed the connection from NIC
> 1
> to NIC 2.
>
> NIC 1 is configured with DNS and Default Gateways. NIC 2 is NOT
> configured
> with DNS or Default Gateways.
>
> Any ideas would be most appreciated.
>
> Thank you

> Thanks Charlie,
>
> Could you please clarify? When you say turn off advanced features on the
> physical NIC are you talking about the Hyper-V Server Core NIC? or the
> Windows 2003 NIC? If you are talking about Hyper-V Server Core do you ahve
> a
> link explaining how to do this from the command line as I don't have a GUI
> to
> easily complete this task. It is strange it happens with 1 NIC and not the
> other when they are basically the same.
>
> Another note, I noticed when transferring files from different operating
> systems revealed different results
> Transfer 350 Mb File
>
> Windows 2003 R2 SP2 --> Hyper-V Server 2008 core NIC 1 = 100 Minutes
> Windows 2003 R2 SP2 --> Hyper-V Server 2008 core NIC 2 = 2 Minutes
> Vista SP1 - Hyper-V Server 2008 core NIC 1 - 1.5 minutes
> Vista SP1 - Hyper-V Server 2008 core NIC 2 - 50 seconds
> XP Pro SP3 - Hyper-V Server 2008 core NIC 1 = 11 minutes
> XP Pro SP3 - Hyper-V Server 2008 core NIC 2 = 50 seconds
>
> Thank you,
>
> Jeromy

> Thanks for the update Charlie,
>
> Again, I'm not quite clear wheather the registry changes should be made on
> the Windows 2008 Server or the Windows 2003/xp systems. It would be
> difficult
> to make this change on ALL XP/2K3 systems, but if that is the only
> solution...
>
> I ran these commands on the Hyper-V 2008 Server Core:
> netsh int ip set global taskoffload=disabled
> netsh int tcp set global RSS=disabled
> netsh interface tcp set global autotuninglevel=disabled
> netsh int tcp set global chimney=disabled
>
> Results:
> netsh int tcp show global
>
> TCP Global Parameters
> ----------------------------------------------
> Receive-Side Scaling State : disabled
> Chimney Offload State : disabled
> Receive Window Auto-Tuning Level : disabled
> Add-On Congestion Control Provider : ctcp
> ECN Capability : disabled
> RFC 1323 Timestamps : disabled
>
> Also verified Registry Changes (remote registry management)
>
> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
> "EnableTCPA"=dword:00000000
> "EnableRSS"=dword:00000000
> "DisableTaskOffload"=dword:00000001
>
> Restarted Hyper-V 2008 Server Core and still have same problem with
> transfer
> files from Hyper-V Server to W2K3 and XP clients but not vista. Again,
> Hyper-V Server has 2 NIC's; 192.168.0.40 NIC1 Slow speed, 192.168.0.41
> NIC2
> Fast speed.
>
> Were these changes supposed to be made on the Hyper-V Server or made on
> the
> W2K3/XP Systems?
>
> NOTE: One of the XP Systems is a virtual machine on Virtual PC 2007 and
> the
> same problems show up there.
>
> Thank you,
> Jeromy

> Charlie,
>
> I modified the registry of a W2K3 Server and it didn't fix the problem. I
> decided to double check my managed switch and the port the server was
> plugged
> into was configured for 100 FD, I changed it to "Auto" and it resolved the
> problem.
>
> Goes to show me 1. check physical connection, 2. check switch
> configuration,
> 3. check NIC configuration...
>
> Thank you so much for your assistance
>
> I will reconfigure my servers back to their default settings to determine
> if
> the transfer speed is resolved with the switch reconfiguration only. I
> will
> post again if setting my configurations back cause problems with
> performance.
>
> Thank you,
> Jeromy G.