The settings listed in the "Advanced" tab enable you to customize how the adapter handles QoS packet tagging, Jumbo Frames, Offloading, and other capabilities.

This page does not apply to adapters that have PRO/10GbE in their name. For those adapters see Advanced Settings for Intel® PRO/10GbE Server Adapters.

NOTES:

• Some features might not be available depending on the operating system and the specific adapters installed.
• Advanced tab layout and feature availability is different when Intel® PROSet for Windows* Device Manager is installed.
• On screen help is available when Intel® PROSet for Windows* Device Manager is installed.

Available settings :
Flow Control
Header Data Split
Interrupt Moderation
Interrupt Moderation Rate
IPv4 Checksum Offload
Jumbo Packet
Large Receive Offload
Large Send Offload (IPv4)
Large Send Offload (IPv6)
Locally Administered Address
Log Link State Event
Low Latency Interrupts
Offload TCP Segmentation
Priority & VLAN
Receive Buffers
Receive Side Scaling
Receive Side Scaling Queues
TCP Checksum Offload(IPv4)
TCP Checksum Offload(IPv6)
Transmit Buffers
UDP Checksum Offload (IPv4)
UDP Checksum Offload (IPv6)

Flow Control enables adapters to generate or respond to flow control frames, which help regulate network traffic. Flow control is configured under Performance Options Properties when Intel® PROSet for Windows* Device Manager is installed.

A link partner can become overloaded if incoming frames arrive faster than the device can process them, and this results in the frames being discarded until the overload condition passes. The flow control mechanism overcomes this problem and eliminates the risk of lost frames.

If a potential overload situation occurs, the device generates a flow control frame, which forces the transmitting link partner to immediately stop transmitting and wait a random amount of time before trying to retransmit.

NOTE: For adapters to benefit from this feature, link partners must support flow control frames.

Interrupt Moderation allows the adapter to moderate interrupts.

When a packet arrives the adapter generates an interrupt which allows the driver to handle the packet. At greater link speeds, more interrupts are created, and CPU utilization also increases. This results in poor system performance. When you enable Interrupt Moderation, the interrupt rate is lower, and the result is better system performance.

Without interrupt moderation, CPU utilization increases at higher data rates because the system must handle a larger number of interrupts. Interrupt moderation causes the network driver to accumulate interrupts and send a single interrupt rather than a series of interrupts. At higher data rates, a high interrupt moderation setting may improve system performance. At low data rates, a lower interrupt moderation setting is preferred as delayed interrupts causes latency.

Enable Jumbo Packets only if devices across the network support them and are configured to use the same frame size. When setting up Jumbo Frames on other network devices, be aware that network devices calculate Jumbo Frame sizes differently. Some devices include the header information in the frame size while others do not.

Note: Intel adapters do not include header information in the frame size.

Large Receive Offload (IPv4) sets the adapter to offload the task of segmenting TCP messages into valid Ethernet frames. Large Receive Offload is configured under TCP/IP Offloading Options properties when Intel® PROSet for Windows* Device Manager is installed.

Because the adapter hardware is able to complete data segmentation much faster than operating system software, this feature may improve transmission performance. In addition, the adapter uses fewer CPU resources.

Because the adapter hardware is able to complete data segmentation much faster than operating system software, this feature may improve transmission performance. In addition, the adapter uses fewer CPU resources.

Note: In a team, Intel® PROSet uses either:

• The team's LAA if the team has an LAA configured, or
• The primary adapter's permanent MAC address if the team does not have an LAA configure
• Intel PROSet does not use an adapter's LAA if the adapter is the primary adapter in a team and the team has an LAA.

Log Link State Event enables the logging of the following link state changes to the system event log.

• LINK_UP_CHANGE
  Indicates that the adapter has established link.
• LINK_DOWN_CHANGE
  Indicates that the adapter has lost link.
• LINK_DUPLEX_MISMATCH
  Indicates a mismatch in duplex between the adapter and the link partner

Troubleshooting Tip : To investigate connection problems, click the Link Speed tab and run diagnostics. The Link Speed tab and diagnostics are only available when Intel® PROSet for Windows* Device Manager is installed.

Low Latency Interrupts option enables adapters to bypass interrupt moderation and immediately generate an interrupt when certain TCP packets arrive, allowing the system to handle the packet more quickly. Certain applications will have faster access to network data because of the reduced data latency.

Intel PROSet for Windows Device Manager must be installed to enable configuration of Low Latency Interrupts. Low Latency Interrupt properties are configurable within the Performance Options properties. To use Low Latency Interrupts check the Use Low Latency Interrupts checkbox and choose one of these options:

• Use for packets with TCP PSH flag: Any incoming packet with the TCP PSH flag will trigger an immediate interrupt. The PSH flag is set by the sending device.
• Use for these TCP ports: Every packet received on the specified ports will trigger an immediate interrupt. Up to 8 ports may be specified.

Note: If Low Latency Interrupts option is enabled, system CPU utilization may increase.

Offload TCP Segmentation enables the adapter to offload the task of segmenting TCP messages into valid Ethernet frames. Offload TCP Segmentation is configured under TCP/IP Offloading Options properties when Intel® PROSet for Windows* Device Manager is installed.

Because the adapter hardware is able to complete data segmentation much faster than operating system software, this feature may improve transmission performance. In addition, the adapter uses fewer CPU resources.

• 802.1p QoS (Quality of Service) tags for priority-tagged packets
• 802.1Q tags for VLANs

When this feature is enabled, tagged packets use the queue settings defined by the operating system's Priority Level Definition. Priority & VLAN is automatically enabled when you set up a VLAN on the VLAN tab. You cannot disable tagging because tagging is required for VLANs.

NOTE: Intel® PROSet for Windows Device Manager and Advanced Networking Services (ANS) must be installed to configure VLANs on Intel® network adapters.

You might choose to increase the number of Receive Buffers if you notice a significant decrease in the performance of received traffic. If receive performance is not an issue, use the default setting.

See the User Guide for additional information on Receive Side Scaling.

TCP Checksum Offload(IPv4) and TCP Checksum Offload(IPv6) enable the adapter to compute (Tx) or verify (Rx) the TCP checksum of packets. TCP Checksum Offload is configured under TCP/IP Offloading Options properties when Intel® PROSet for Windows* Device Manager is installed. This feature may improve performance and reduce CPU utilization. With Offloading enabled, the adapter computes or verifies the checksum for the operating system.

You might choose to increase the number of Transmit Buffers if you notice a significant decrease in the performance of transmitted traffic. If transmission performance is not an issue, use the default setting.

This applies to:

Intel® 10 Gigabit AF DA Dual Port Server Adapter Intel® 10 Gigabit AT Server Adapter Intel® 10 Gigabit CX4 Dual Port Server Adapter Intel® 10 Gigabit XF LR Server Adapter Intel® 10 Gigabit XF SR Dual Port Server Adapter Intel® 10 Gigabit XF SR Server Adapter