3Com 3C990B-TX-M User Manual

Contents

3Com 3C990B-TX-M User Manual Manual pdf 13 page image

3C990B Client and Server NIC Features5 Desktop Management Interface (DMI) 2.0 — Enables managed computers and netcomputers to report details about themselves and their peripheral devices across thenetwork to a DMI 2.0-compliant management application. Remote System Alerts (heartbeat packets) — Can signal a possible computer powerloss or theft. Remote Control — Lets you troubleshoot and resolve system issues across the network. Keep-Alive — Prevents the computer workstation address from being aged-out ofswitch router tables. Hot Plug NIC Installation — Lets you add a new NIC or remove and replace a NICwithout turning off power to the computer. Flow Control Features — prevents the loss of packets by keeping the input buffers of adevice from overflowing. Offline Diagnostics — Provides offline diagnostics programs for configuring, testing,and troubleshooting NICs. 3Com DynamicAccess Advanced Server Features (for 3C990BSVR server NICs only) —Improved network performance, management, and control.Windows 2000 Offload FeaturesThe 3C990B NIC supports Windows 2000 offload features in an IP environment. TheWindows 2000 offload features are designed to enhance the Windows 2000 operatingsystem capabilities by off-loading key TCP/IP networking and security tasks from theWindows 2000 operating system: IPSec Offload — reduces CPU utilization by allowing the 3XP processor and a cryptochip on the NIC to perform data encryption operations. (For more information, seeChapter 4, “Installing and Configuring Data Encryption Offloads.”) TCP Segmentation Offload — reduces CPU utilization by allowing the 3XP processoron the NIC to perform segmentation of TCP packets. IP and TCP Checksum Offload — reduced CPU utilization by allowing the 3XP processoron the NIC to perform the checksum calculation of TCP/IP and UDP/IP packets. 802.1P Packet Priority Offload — reduces CPU utilization by allowing the 3XP processoron the NIC to perform the insertion of the 802.1Q tag header into the packet.For more information on enabling and disabling offloads for Windows 2000, see “UsingWindows 2000 Offload Features” on page 52.Remote Wake-UpRemote Wake-Up provides the ability to remotely power-on a network computer for after-hours administration. When the PC is in sleep mode and receives a wake-up packet(Magic Packet frame) through the LAN, the NIC turns on the power to the PC. RemoteWake-Up also requires using a desktop management application that is able to generate aMagic Packet Remote Wake-Up signal.NOTE: The 3C990B NIC is shipped with the IPSec offload capability disabled. Tolearn about enabling IPSec offloads, see Chapter 4, “Installing and ConfiguringData Encryption Offloads.”NOTE: Windows 2000 does not allow IPSec offloads and TCP Segmentationoffloads for the same session. Though all offload types may be enabled, TCPSegmentation offloading will not occur during an IPSec session.