IBM 8668 Hardware Maintenance Manual - Page 96
Ethernet ports, USB-port connectors, Configuring the Ethernet controllers
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USB-port connectors: Each USB port has an external connector on the rear of the server for attaching USB-compatible devices. 1 4 The following table shows the pin-number assignments for the USB-port connectors on the rear of your server. Table 4. USB-port connector pin-number assignments Pin Signal 1 +5 V VCC 2 -Data 3 +Data 4 Ground Ethernet ports The server comes with an integrated Ethernet controller. This controller provides an interface for connecting to 10-Mbps or 100-Mbps networks and provides full-duplex (FDX) capability, which enables simultaneous transmission and reception of data on the Ethernet local area network (LAN). To access the Ethernet ports, connect a Category 3, 4 or 5 unshielded twisted-pair (UTP) cable to the RJ-45 connector on the rear of your server. Note: The 100BASE-TX Fast Ethernet standard requires that the cabling in the network be Category 5 or higher. Configuring the Ethernet controllers: When you connect your server to the network, the Ethernet controllers automatically detect the data-transfer rate (10 Mbps or 100 Mbps) on the network and then set the controllers to operate at the appropriate rate. In addition, if the Ethernet ports that your server is connected to support auto-negotiation, the Ethernet controllers will set the appropriate duplex state. That is, the Ethernet controllers will adjust to the network data rate, whether the data rate is standard Ethernet (10BASE-T), Fast Ethernet (100BASE-TX), half duplex (HDX), or full duplex (FDX). The controllers support half-duplex (HDX) and full-duplex (FDX) modes at both speeds. The Ethernet controllers are PCI Plug and Play devices. You do not need to set any jumpers or configure the controllers for your operating system before you use the Ethernet controllers. However, you must install a device driver to enable your operating system to address the Ethernet controllers. The device drivers are provided on the ServerGuide CDs. Failover for redundant Ethernet: The IBM 10/100 Ethernet Adapter or the IBM 10/100 EtherJet™ PCI family of adapters are optional redundant network interface cards (NICs) that you can install in your server. If you install this NIC and connect it to the same logical segment as the primary Ethernet controller, you can configure the server to support a failover function. You can configure either one of the integrated Ethernet controllers or the NIC as the primary Ethernet controller. In failover mode, if the primary Ethernet controller detects a link failure, all Ethernet traffic associated with it is switched to the redundant (secondary) controller. This 88 Hardware Maintenance Manual: xSeries 232, Type 8668