User manual SMC 9712GT/2

[. . . ] Each port on the switch supports auto MDI/MDI-X, which eliminates the need for crossover cables or uplink ports. The switch is plug-and-play; any port can be connected to a server, a hub, or a switch, using straight-through or crossover cable. FEATURES Complies with IEEE 802. 3, IEEE 802. 3u, IEEE 802. 3ab standards 24 ports for 10/100BASE-TX full- and half-duplex connections. 2 ports for 10/100 Mbps full/half-duplex and 1000 Mbps full-duplex connections. Store-and-forward switching eliminates error packets. [. . . ] With the 802. 1p QoS function, you can reserve bandwidth for important functions that require a lot of bandwidth or have a high priority, such as VoIP (Voice-over Internet Protocol), web browsing applications, or video conferencing. The switch has separate hardware queues on each physical port to which packets from various applications are mapped and priorities assigned. The illustration below shows how 802. 1p priority queuing is implemented on the switch. Figure 1: Mapping QoS on the Switch Tag untag 0 1 2 3 4 5 6 7 Priority Queue Weight Value TC0 1 TC1 2 There are two priority queues labeled TC0 and TC1. The untagged packets and the eight IEEE 802. 1p priority values (defined by the standard) are mapped to the two priority queues on the switch. TC1 has the highest priority of the two priority queues, while TC0 has the lowest priority. The SMC9712GT/2 switch uses Weighted Robin Round (WRR) for scheduling. The WRR queue-scheduling algorithm schedules all the queues in turn with every queue assured a certain service time. The default weight values of TC0 and TC1, are 1:16 ­ 12 ­ 2 HARDWARE DESCRIPTION This chapter describes the front panel, rear panel, and LED indicators of the switch. FRONT PANEL The front panel of SMC9712GT/2 consists of switch LED indicators, 24 10/100 Mbps RJ-45 ports and 2 10/100/1000 Mbps RJ-45 ports. Figure 2: SMC9712GT/2 Switch Front Panel 1 3 5 7 9 11 13 15 17 19 21 23 GIGA1 Power GIGA1 GIGA2 1 3 5 7 9 11 13 15 17 19 21 23 Link Act 100Mbps Link Act 100Mbps Link/Act 1000M 2 4 6 8 10 12 14 16 18 20 22 24 2 4 6 8 10 14 12 10/100Mbps 16 18 20 22 24 GIGA2 10/100/1000Mbps PORT AND SYSTEM STATUS LEDS The switch includes a display panel for key system and port indications that simplify installation and network troubleshooting. The LEDs, which are located on the front panel, are described in the following table. Table 1: System and Port Status LEDs LED Power Condition On Green Off Link/Act On/Flashing Green Off 100Mbps On Green Off Status The internal power supply is operating normally. Port has established a valid network connection. The port is operating at 10 Mbps. ­ 13 ­ Rear Panel CHAPTER 2 | Hardware Description Table 1: System and Port Status LEDs (Continued) LED 1000M Condition On Green Off Status The port is operating at 1000 Mbps. Connect the switch to a power source with the provided power cord. See "Powering On" on page 19. CAUTION: Avoid placing anything heavy on the switch. RACK INSTALLATION To install the switch in an EIA standard-sized, 19-inch rack, follow the instructions described below: 1. Secure the supplied rack-mounting brackets to each side of the switch with supplied screws, as illustrated in the following figure. Figure 5: Attaching Brackets ­ 18 ­ CHAPTER 3 | Installing the Switch Installation 2. Use suitable screws (not provided) to secure the brackets to the rack, as illustrated in the following figure. Figure 6: Mounting the Switch 3. Connect the switch to a power source with the provided power cord. See "Powering On" on page 19. POWERING ON The SMC9712GT/2 switch is powered by connecting to an AC power supply using a power cord. When powering on the switch, it automatically initializes and the LED indicators respond as follows: 1. All of the LED indicators flash momentarily for one second, which represents a resetting of the system. 2. The Power LED indicator turns on green. ­ 19 ­ CHAPTER 3 | Installing the Switch Connecting Network Devices CONNECTING NETWORK DEVICES The switch is designed to be connected to network cards in PCs and servers, as well as to other switches and hubs. CABLING GUIDELINES The RJ-45 ports on the switch support automatic MDI/MDI-X pinout configuration, so you can use standard straight-through twisted-pair cables to connect to any other network device (PCs, servers, switches, routers, or hubs). Each device requires an unshielded twisted-pair (UTP) cable with RJ-45 connectors at both ends. [. . . ] Use Category 5, 5e or 6 cable for 1000BASE-T connections, Category 5 or better for 100BASE-TX connections, and Category 3 or better for 10BASE-T connections. CONNECTING TO PCS, SERVERS, HUBS AND SWITCHES 1. Attach one end of a twisted-pair cable segment to the device's RJ-45 connector. 2. Attach the other end of the cable segment to an available port on the switch. Make sure each twisted pair cable does not exceed 100 meters (328 ft) in length. 3. [. . . ]