C H A PT E R 1 Overview The FastHub 116T is an unmanaged 16-port 100BaseT Class II repeater for workgroups and server farms. It is a member of an extended network system of stackable, modular LAN and WAN products that increase LAN performance, connect remote offices and users, and provide secure access. Figure 1-1 shows the network system units.
Feature Summary Feature Summary The FastHub has 16 fixed 100BaseTX ports (with an alternative uplink port for connecting to other 100BaseTX hubs). Table 1-1 summarizes the FastHub features. Table 1-1 Feature Summary Feature Description Compatibility • IEEE 802.3u Class II repeater compliant. • Compatible with the 100BaseT standard for interoperability with other 100BaseT products. Performance 100-Mbps peak and aggregate throughput.
Front Panel Description Front Panel Port Connectors H10260 Figure 1-2 RPS 1x 2x 3x 4x 5x 6x 7x 8x 9x 10x 11x 12x 13x 14x 15x 16x 16 MODE 100BaseTX ports 100BaseTX uplink port Ports 1x through 16x have their transmit (TD) and receive (RD) pairs internally crossed. Standard Category 5 UTP crossover cable is required when connecting these ports to another hub, switch, or router (unless you are connecting to the uplink port on another FastHub or 100BaseT hub).
Front Panel Description LEDs You can use the FastHub LEDs to monitor network activity and performance. Figure 1-3 shows the location of the LEDs and the Mode button. Figure 1-3 LEDs and Mode Button Port status LEDs Redundant power system LED System status LED 1x 2x 3x 4x H9261 H9909 Port mode LED Mode Collision button LED RPS LED The redundant power system LED shows the status of the RPS (see Table 1-2).
Front Panel Description SYSTEM LED The system status LED shows whether the FastHub is powered up and provides an indication of any problem with the main system board of the FastHub (see Table 1-3). Note The system status LED and RPS LED are used together to isolate internal power supply or RPS problems. See the “Verifying and Troubleshooting Your Installation” section in the “Installing the FastHub” chapter for detailed information.
Front Panel Description Port Mode LED The port mode LED indicates the STAT (port status), UTL (bandwidth utilization), and ID (unit identification) modes. Note Port 16 (the uplink port) uses the port 16x LED. STAT Mode In port status mode, port LEDs show individual port status (see Table 1-5). Table 1-5 Port Status LED Description Color Port Status Off No link (link down). Green Link operational (with no activity). Flashing green Link operational (with activity).
Front Panel Description UTL Mode In utilization mode, bandwidth usage is shown for the FastHub. The port LEDs show the current bandwidth and the peak bandwidth usage that occurred since the last reset. The far-right solid green LED denotes the peak bandwidth that was recorded since the last reset. All LEDs to the left of the solid green LED operate in a scalable pattern, flashing green from left to right, to show the current bandwidth utilization.
Rear Panel Description Mode Button To change the mode being displayed by a port LED, press the Mode button to highlight in sequence each of the modes: STAT, UTL, and ID. The Mode button is independent of the Collision LED. When the desired mode is selected, release the button to make the change. As long as you hold the Mode button down, the mode does not change. The selected mode remains on for 30 seconds before returning to the default mode of STAT (port status).
Examples of Using the FastHub Examples of Using the FastHub This section describes several possible network configurations using the FastHub. Workgroups You can create 100-Mbps workgroups by interconnecting FastHubs (FastHub 116T, FastHub 216T, and FastHub 300 series), as shown in Figure 1-5.
Examples of Using the FastHub Server Farms Using the FastHub, you can create 100-Mbps server farms to increase centralized and decentralized server performance, as shown in Figure 1-6.
Examples of Using the FastHub Extended Network System A system of routers, switches, and hubs can be combined to create a high-performance network that extends beyond the main office LAN to connect to branch offices, remote sites, mobile users, and the Internet. Figure 1-7 is an application for an extended network system.
Examples of Using the FastHub 1-12 FastHub 116T Installation Guide
