Dell External OEMR R310 Technical Manual

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Contents

DellDell PowerEdge R310 Technical Guide 5411.16 IPv4 and IPv6 Large Send OffloadNormally, the TCP segmentation is done by the protocol stack. When you enable the Large Send Offloadproperty, the TCP segmentation can be done by the network adapter. The default setting for this property isEnabled.11.17 Jumbo MTUEnables the network adapter to transmit and receive oversized Ethernet frames that are greater than 1514bytes, but less than or equal to 9000 bytes in length (9600 bytes for network adapters that operate at 10Gbps). This property requires the presence of a switch that is able to process jumbo frames. This property isonly available for Broadcom NetXtreme II adapters.11.18 LSO and Jumbo FramesEnables the network adapter to transmit and receive oversized Ethernet frames that are greater than 1514bytes, but less than 9000 bytes in length. This property requires the presence of a switch that is able toprocess Jumbo frames. This information is available for some Broadcom® NetXtreme® adapters but is notavailable for all Broadcom NetXtreme II adapters.11.19 Wake-Up CapabilitiesEnables the network adapter to wake up from a low-power mode when it receives a network wakeup frame.Two types of wake-up frames are possible: Magic Packet™ and Wake Up Frame. This property is onlyavailable for Broadcom NetXtreme adapters.Both (default). Selects both Magic Packet and Wake Up Frame as wake-up frames.Magic Packet. Selects Magic Packet as the wake-up frame.None. Selects no wake-up frame.Wake Up Frame. Selects Wake Up Frame as the wake-up frame and allows the network adapter to wake thesystem when an event such as a ping or an Address Resolution Protocol (ARP) request is received. Thisoption works in conjunction with the operating system power mode saving and does not work if the PowerSave setting does not enable WOL.11.20 WOL SettingsSets the speed at which the network adapter connects to the network while the network adapter is in Wakeon LAN mode. By default, the WOL Speed property is set to Auto. This property is only available forBroadcom NetXtreme adapters.• 10 Mb. Sets the speed to 10 Mbit/s. This is the network speed when the system is in a standby modeawaiting a wakeup frame.• 100 Mb. Sets the speed to 100 Mbit/s.• Auto (default). Sets the speed for optimum network connection.11.21 Virtualization FunctionalityBroadcom has partnered with various VM vendors, including VMware®, to remove some of the virtualizationbottlenecks and improve system performance by providing additional features. Broadcom Ethernet networkcontrollers support stateless offloads such as TCP Checksum Offload (CSO), which enables network adaptersto compute TCP checksum on transmit and receive, and TCP Large Send Offload (LSO), which allows TCPlayer to build a TCP message up to 64 KB long and send it in one call down the stack through IP and theEthernet device driver, saving the host CPU from having to compute the checksum in a virtual environment.