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NetXtreme II User Guide
January 2010
Broadcom Corporation
Page 240 Microsoft Virtualization with Hyper-V Document ENGSRVT52-CDUM100-R
SINGLE NETWORK ADAPTER
Windows Server 2008
When configuring a NetXtreme II network adapter on a Hyper-V system, be aware of the following:
• An adapter that is to be bound to a virtual network should not be configured for VLAN tagging through the driver’s
advanced properties. Instead, Hyper-V should manage VLAN tagging exclusively.
• Since Hyper-V does not support Jumbo Frames, it is recommended that this feature not be used or connectivity issues
may occur with the child partition.
• The Locally Administered Address (LAA) set by Hyper-V takes precedence over the address set in the adapter’s
advanced properties.
• A TOE-enabled network adapter that is bound to a Hyper-V virtual network will report TOE as an offload capability in
BACS; however, TOE will not work. This is a limitation of Hyper-V. Hyper-V does not support TOE.
• In an IPv6 network, a team that supports CO and/or LSO and is bound to a Hyper-V virtual network will report CO and
LSO as an offload capability in BACS; however, CO and LSO will not work. This is a limitation of Hyper-V. Hyper-V does
not support CO and LSO in an IPv6 network.
Windows Server 2008 R2
When configuring a NetXtreme II network adapter on a Hyper-V system, be aware of the following:
• An adapter that is to be bound to a virtual network should not be configured for VLAN tagging through the driver’s
advanced properties. Instead, Hyper-V should manage VLAN tagging exclusively.
• The Locally Administered Address (LAA) set by Hyper-V takes precedence over the address set in the adapter’s
advanced properties.
• The LSO and CO features in the guest OS are independent of the network adapter properties.
• To allow jumbo frame functionality from the guest OS, both the network adapter and the virtual adapter must have
jumbo frames enabled. The Jumbo MTU property for the network adapter must be set to allow traffic of large MTU from
within the guest OS. The jumbo packet of the virtual adapter must be set in order to segment the sent and received
packets.