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DELL T610 Broadcom NetXtreme II NIC can't detect on MS Hyper-V Virtual Machine.
How can I do?
It sounds like you need to install the virtual machine integration components. Then the drivers for the network adapter will be in your Server 2003 installation.
You probably need to add the NIC as a emulated/legacy network adapter instead of as an synthetic network adapter. Installing the virtual guest services should allow a synthetic adapter to be recognized as well.
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