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Advanced Settings for Intel® PRO/10GbE Server Adapters


Last Reviewed: 13-Sep-2017
Article ID: 000007219

You can change the settings in the Advanced tab to customize how the adapter handles:

  • QoS packet tagging
  • Jumbo Frames
  • Offloading
  • Other capabilities

This page applies only to adapters that have PRO/10GbE in their name. For other 10 gigabit adapters, see Advanced Settings for Intel® 10 Gigabit Server Adapters.

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

Advanced settings

  • Interrupt moderation

    Allows the adapter to moderate interrupts.

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

    Supported Operating System Windows Server 2008*
    Default Enabled
    Range Disabled
    Enabled
  • Interrupt moderation rate

    How often the controller generates interrupts.

    Moderating the frequency of interrupts makes it possible to optimize network throughput and CPU utilization. The default setting (Adaptive) adjusts the interrupt rates dynamically depending on traffic type and network usage. Choosing a different setting may improve network and system performance in certain configurations. Ensure you've installed Intel® PROSet for Windows* Device Manager. You can configure Interrupt Moderation Rate under Performance Options Properties.

    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 moderation setting for high interrupt may improve system performance. At low data rates, we recommend a moderation setting for lower interrupt because delayed interrupts cause latency.

    Supported Operating System Windows Server 2008*
    Default Adaptive
    Range Adaptive
    High
    Low
    Medium
    Off
  • IPv4 checksum offload

    Enables the adapter to verify the TCP/IP checksum on received packets (RX) and compute checksum on transmitted packets (TX).

    When you have installed Intel® PROSet for Windows* Device Manager, you can configure IPv4 Checksum Offload under TCP/IP Offloading Options properties. Enabling this feature may improve TCP/IP performance and reduce CPU utilization. With Offloading disabled, the operating system calculates and verifies the TCP/IP checksum.

    Supported Operating System Windows Server 2008*
    Default RX and TX Enabled
    Range Disabled
    RX and TX Enabled
    RX Enabled
    TX Enabled
  • Jumbo Frames

    Enables or disables Jumbo Frame capability.

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

    Jumbo frames put more data in each frame, sending out fewer frames to increase throughput and decrease CPU utilization. The standard Ethernet frame size is 1,514 bytes, while jumbo frames can contain 4,088, 9,014, or 16,128 bytes. Available settings vary depending on the specific adapter. In Windows* Server 2008, the setting is Jumbo Packet.

    Only enable jumbo frames if devices across the network support them and you configure them 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.

    Supported Adapters All
    Default Disabled
    Range

    Disabled (1,514 bytes)
    4,088 bytes
    9,014 bytes
    16,128 bytes
    (Set the switch 4 bytes higher for CRC, plus 4 bytes if using VLANs.)

    Note Not all adapters support 16,128 byte jumbo frames.
  • Large send offload (IPv4) and large send offload (IPv6)

    Offload the task of segmenting TCP messages into valid Ethernet frames.

    With Intel® PROSet for Windows* Device Manager installed, you can configure Large Receive Offload under the TCP/IP Offloading Options properties.

    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.

    Supported Operating System Windows Server 2008*
    Default Enabled
    Range Disabled
    Enabled
  • Locally administered address

    Overrides the initial MAC address with a user-assigned MAC address. To enter a new network address, type a 12-digit hexadecimal number in this box.

    .Note that in a team, Intel® PROSet uses either:

    • The team's LAA, if the team has an LAA configured
    • The permanent MAC address of the primary adapter, if the team does not have an LAA configured
    Intel PROSet does not use an adapter's LAA if:
    • The adapter is the primary adapter in a team
    • The team has an LAA
    Supported Adapters All
    Default None
    Range 0000 0000 0001 - FFFF FFFF FFFD
    Exceptions:
    • Do not use a multicast address (Least Significant Bit of the high byte = 1).
    • Do not use all zeros or all F's.
    Note Present Setting: Reverts to original network address of the adapter.
  • Log link state event enables logging these 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.

    To investigate connection problems, click the Link Speed tab and run diagnostics.

  • Priority & VLAN

    Enables sending and receiving IEEE 802.3ac tagged frames, including:

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

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

    Note To configure VLANs on Intel® network adapters, you must install both:
    • Intel® PROSet for Windows Device Manager
    • Intel® Advanced Network Services (Intel® ANS)
    Supported Operating System Windows Server 2008*
    Default Priority and VLAN Enabled
    Range Priority and VLAN Disabled
    Priority and VLAN Enabled
    Priority Enabled
    LAN Enabled
  • Receive buffers

    Sets the number of receive buffers used by the adapter when copying data to memory.

    Increasing this value can enhance receive performance, but consumes system memory. When you have Intel® PROSet for Windows* Device Manager installed, configure receive buffers under Performance Options Properties.

    You may 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.

    Supported Operating Systems Windows Server 2008*
    Default 256
    Range 128
    192
    256
    320
    384
    448
    512
  • Offload receive IP checksum

    Enables the adapter to verify the IP checksum of incoming packets. This feature enhances reception performance and reduces CPU utilization.

    With Offloading disabled, the operating system verifies the IP checksum. With Offloading enabled, the adapter completes the verification for the operating system.

    Supported Operating Systems Windows Server 2003*, Server, Windows 2000*
    Default The default varies with the operating system.
    Range On
    Off
  • Offload receive TCP checksum

    Enables the adapter to verify the TCP or UDP checksum of incoming packets. This feature enhances reception performance and reduces CPU utilization.

    With Offloading disabled, the operating system verifies the TCP checksum. With Offloading enabled, the adapter completes the verification for the operating system.

    Supported Operating Systems Windows Server 2003, Server, Windows 2000
    Default The default varies with the operating system.
    Range On
    Off
  • Offload TCP segmentation

    Enables the adapter to offload the task of segmenting TCP messages into valid Ethernet frames. This feature enhances TCP transmit performance and reduces CPU utilization.

    With Offloading off, the operating system performs TCP segmentation. With Offloading on, the adapter completes the segmentation for the operating system.

    Default The default varies with the operating system.
    Range On
    Off
  • Offload transmit IP checksum

    Enables the adapter to compute the IP checksum of outgoing packets. This feature enhances IP transmit performance and reduces CPU utilization.

    With Offloading disabled, the operating system verifies the IP checksum. With Offloading enabled, the adapter completes the verification for the operating system.

    Supported Operating Systems Windows Server 2003*, Server, Windows 2000*
    Default On
    Range On
    Off
  • Offload transmit TCP checksum

    Enables the adapter to compute the TCP or UDP checksum of outgoing packets. This feature enhances TCP and UDP transmit performance and reduces CPU utilization.

    With Offloading disabled, the operating system verifies the TCP checksum. With Offloading enabled, the adapter completes the verification for the operating system.

    Supported Operating Systems Windows Server 2003*, Server, Windows 2000*
    Default On
    Range On
    Off
  • QoS packet tagging

    Enables the adapter to send and receive IEEE 802.3ac tagged frames, including 802.1p> QoS and 802.1Q VLAN indications.

    Supported Adapters All
    Default Disabled
    Range Enable
    Disabled
  • Receive descriptors

    Defines the number of data segments enabling the adapter to allocate received packets to memory. Depending on the size of the packet, each receive packet requires one or more receive descriptors.

    You may increase the number of receive descriptors if you notice a significant decrease in the performance of received traffic. If receive performance is not an issue, use the default setting appropriate to the adapter. The default setting is 256.

  • Transmit descriptors

    Defines the number of data segments enabling the adapter to track transmit packets in the system memory. Depending on the size of the packet, each transmit packet requires one or more transmit descriptors.

    You may increase the number of transmit descriptors if you notice a possible problem with transmit performance. Although increasing the number of Transmit Descriptors can enhance transmit performance, Transmit Descriptors do consume system memory. If transmit performance is not an issue, use the default setting of 512.

Related topic
Jumbo Frames and Jumbo Packets Notes