Dell Emulex Family of Adapters - Manual (Page 593)

Emulex Drivers for Windows User Manual P010077-01A Rev. A
3. Configuration
NIC Driver Configuration
593
Enhanced
Transmission
Selection Disabled (default)
Enabled Windows Server 2008
Windows Server 2008 R2
Windows Server 2012
Windows Server 2012 R2
Notes:
• For OCe11102 UCNAs
only.
• ETS is not supported in
conjunction with VMQ
technology. ETS is not
available if SR-IOV is
enabled.
If ETS is enabled, the driver filters
transmit packets based on the
802.1p priority tag into multiple
separate transmit rings. The
network switch should be
configured for ETS to group
priorities into a priority group (or
traffic class). Each priority group
may be assigned a QoS bandwidth
limit. For example, one network
priority may to support priority
flow control to achieve loss-less
network traffic. Using separate
hardware interfaces in the driver
allows each priority to progress at
a different rate, or pause
temporarily without affecting the
other priorities.
When ETS is enabled, all
configurations regarding
bandwidth and priority flow
control should be performed on
the network switch. The adapter
will learn the configuration using
the DCBx protocol.
Flow Control Disabled
RX and TX Enabled (default)
Rx Enable/Tx Disable
Tx Enable/Rx Disable Windows Server 2008
Windows Server 2008 R2
Windows Server 2012
Windows Server 2012 R2 Flow control is almost always
advantageous to avoid packet
drops on the network. The switch
or network peer must also have
flow control enabled.
The IEEE 802.3x Ethernet
specification defines a control
frame between peers that can
request a pause in packet
transmissions. This allows one
system to request a temporary
halt of all incoming traffic when
receive buffer space is exhausted.
The network device may be
configured to respond to pause
frames (Rx Enable) and/or to send
pause frames (Tx Enable).
IP Checksum
Offload (IPv4) Disabled
RX and TX Enabled (default)
RX Enabled
TX Enabled Windows Server 2008
Windows Server 2008 R2
Windows Server 2012
Windows Server 2012 R2 This offloads the transmit and/or
receive IPv4 checksum
computation.
Offloading checksums increases
system efficiency.
Table 3-3 Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, and Windows Server 2012 R2 NIC
Driver Options (Continued)
Option Name Acceptable Values
Supported Operating
Systems
Definition