User manual SMC 6724L2

[. . . ] TigerSwitch 10/100 24-Port Fast Ethernet Switch N N N N N N N N N N N 24 10BASE-T/100BASE-TX auto MDI/MDI-X ports Optional 1000BASE-X or 100BASE-FX modules 8. 8 Gbps of aggregate bandwidth Non-blocking switching architecture Spanning Tree Protocol Up to eight port trunks Port mirroring for non-intrusive analysis QoS support for two-level priority Full support for VLANs with GVRP IP Multicasting with IGMP Snooping Manageable via console, Web, SNMP/RMON Installation Guide SMC6724L2 TigerSwitch 10/100 Installation Guide From SMC's Tiger line of feature-rich workgroup LAN solutions 6 Hughes Irvine, CA 92618 Phone: (949) 707-2400 November 2001 Pub. However, no responsibility is assumed by SMC for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SMC. SMC reserves the right to change specifications at any time without notice. [. . . ] The figure below illustrates a TigerSwitch connecting multiple segments with fiber cable. Warehouse Headquarters 1 2 3 4 5 6 7 8 9 10 11 12 Link Status Link 1 2 3 4 5 6 7 8 9 10 11 12 M1 COL ACT FDX 100M 13 14 15 16 17 18 19 20 21 22 23 24 M2 Tiger Switch 10/100 6724L2 Power SNMP Status Console 1 2 3 4 5 6 7 8 9 10 11 12 Link Status Link Status 13 14 15 16 17 18 19 20 21 22 23 24 M2 1 2 3 4 5 6 7 8 9 10 11 12 M1 COL ACT FDX 100M Power Tiger Switch 10/100 6724L2 SNMP Status Console Gigabit Link (550 meters) Status 13 14 15 16 17 18 19 20 21 22 23 24 13 14 15 16 17 18 19 20 21 22 23 24 . . . 100 Mbps Link (2 km) Research & Development 1 2 3 4 5 6 7 8 9 10 11 12 Link Status Link Status 13 14 15 16 17 18 19 20 21 22 23 24 M2 1 2 3 4 5 6 7 8 9 10 11 12 M1 COL ACT FDX 100M Remote Switch 1 2 3 4 5 6 7 8 9 10 11 12 Link Status Link Status 13 14 15 16 17 18 19 20 21 22 23 24 M2 1 2 3 4 5 6 7 8 9 10 11 12 M1 COL ACT FDX 100M Power Tiger Switch 10/100 6724L2 SNMP Status Console 13 14 15 16 17 18 19 20 21 22 23 24 Power Tiger Switch 10/100 6724L2 SNMP Status Console 13 14 15 16 17 18 19 20 21 22 23 24 Server Farm . . . . . . 10/100 Mbps Segments Figure 2-2. Collapsed Backbone Using Fiber Cable 2-3 NETWORK PLANNING Making VLAN Connections VLANs can be based on port groups, or each data frame can be explicitly tagged to identify the VLAN group it belongs to. When using port-based VLANs, ports can either be assigned to one specific group or to all groups. A single switch can be easily configured to support several VLAN groups for various organizational entities (such as Finance and Marketing). When you expand port-based VLANs across several switches, you need to make a separate connection for each VLAN group. This approach is, however, inconsistent with the Spanning Tree Protocol, which can easily segregate ports that belong to the same VLAN. When VLANs cross separate switches, it is therefore better to use VLAN tagging. This allows you to assign multiple VLAN groups to the "trunk" ports (that is, tagged ports) connecting different switches. R&D VLAN 1 Tagged Ports 1 2 3 4 5 6 7 8 9 10 11 12 Link Status Link Status 13 14 15 16 17 18 19 20 21 22 23 24 M2 1 2 3 4 5 6 7 8 9 10 11 12 M1 COL ACT FDX 100M Power Tiger Switch 10/100 6724L2 SNMP Status Console 13 14 15 16 17 18 19 20 21 22 23 24 Untagged Ports VLAN unaware switch Marketing Tagged Port VLAN aware switch R&D Finance Testing Finance VLAN 2 Testing VLAN 3 VLAN 4 VLAN 3 VLAN 1 VLAN 2 Figure 2-3. Making VLAN Connections Note: When connecting to a switch that does not support IEEE 802. 1Q VLAN tags, use untagged ports. 2-4 CONNECTIVITY RULES Connectivity Rules When adding hubs (repeaters) to your network, please follow the connectivity rules listed below for Ethernet or Fast Ethernet. However, note that because switches break up the path for connected devices into separate collision domains, you should not include the switch or connected cabling in your calculations for cascade length involving other devices. 1000 Mbps Gigabit Ethernet Collision Domain Maximum Fiber Optic Cable Distance for 1000BASE-SX Fiber Size 62. 5/125 micron 50/125 micron Fiber Bandwidth 160 MHz/km 200 MHz/km 400 MHz/km 500 MHz/km Maximum Cable Length 2-220 m (7-722 ft) 2-275 m (7-902 ft) 2-500 m (7-1641 ft) 2-550 m (7-1805 ft) Maximum Fiber Optic Cable Distance for 1000BASE-LX Fiber Size 9/125 micron Fiber Bandwidth N/A Maximum Cable Length 2 m - 5 km (7 - 16404 ft) Maximum Cable Distance for 1000BASE-T Type Cat. 5, 5e 100-ohm UTP Connector RJ-45 Maximum Cable Length 100 m (328 ft) 2-5 NETWORK PLANNING 100 Mbps Fast Ethernet Collision Domain Type 100BASE-TX 100BASE-FX Multimode 100BASE-FX Single-Mode Cable Type Category 5 100-ohm UTP or STP 50/125 or 62. 5/125 micron core multimode fiber (MMF) 9/125 micron core single-mode fiber (SMF) Max. Cable Length 100 m (328 ft) 2 km (1. 24 miles) 20 km (12. 43 miles) SMC 3-2 Rule for Class II Repeaters Between any two PCs or other stations in the same 100BASE-TX collision domain, there may be: · · up to 3 link segments and up to 2 Class II repeaters (hubs) SMC 2-1 Rule for Class I Repeaters Between any two PCs or other stations in the same 100BASE-TX collision domain, there may be: · · up to 2 link segments and up to 1 Class I repeater (hub) Maximum Network Diameter Using Repeaters Repeater Type and Number 1 Class I 1 Class II 2 Class II Twisted Pair 100BASE-TX 200 m (656 ft) 200 m (656 ft) 205 m (672. 4 ft) 2-6 CONNECTIVITY RULES 10 Mbps Ethernet Collision Domain SMC 5-4-3 Rule Between any two PCs or other stations in the same 10 Mbps collision domain, there may be: · · · up to 5 link segments in series, up to 4 repeaters (hubs), up to 3 populated cable segments, that is, segments attached to two or more PCs (coax networks only). * * The remaining two segments are unpopulated; these are known as inter-repeater links or IRLs. This distinction between populated and unpopulated segments is significant for coax networks only. Maximum Ethernet Cable Distance Cable Type Twisted Pair, Categories 3, 4, 5 Thin Coax External Transceiver Drop Maximum Length 100 m (328 ft) 185 m (607 ft) 50 m (165 ft) 2-7 NETWORK PLANNING Application Notes 1. Full-duplex operation only applies to point-to-point access (such as when a switch is attached to a workstation, server or another switch). When the switch is connected to a hub, both devices must operate in half-duplex mode. When a switch is connected to a hub or any kind of shared media, remember to turn off back pressure to prevent jamming packets from being propagated thoughout the hub. For network applications that require routing (such as when interconnecting dissimilar network types or distinct VLANs), you may have to attach the TigerSwitch 10/100 units directly to a router or Layer 3 switch (such as the SMC6724L3). The multimode fiber modules are fitted with SC connectors, but you can attach an ST plug to the switch using SMC's optional SC-to-ST plug converter (Part Number: 99-012034-091, for 62. 5/125 micron cable only). If you do use an ST plug converter, be sure you run cable from the Rx (Tx) port on the module to the Tx (Rx) port on the target device. As a general rule: · The length of Gigabit fiber optic cable for a single switched link should not exceed 550 m (1805 ft) for multimode fiber or 5 km (16404 ft) for single-mode fiber. The length of 100BASE-FX fiber optic cable for a single switched link should not exceed 2 km (1. 24 miles) for multimode fiber or 20 km (2. 43 miles) for single-mode fiber. · However, power budget constraints must also be considered when calculating the maximum cable length for your specific environment. 2-8 CHAPTER 3 INSTALLING THE SWITCH Selecting a Site TigerSwitch 10/100 units can be mounted in a standard 19-inch equipment rack or on a flat surface. N The site should: · · be at the center of all the devices you want to link and near a power outlet. [. . . ] Collision A condition in which packets transmitted over the cable interfere with each other. CSMA/CD Carrier Sense Multiple Access/Collision Detect is the communication method employed by Ethernet and Fast Ethernet. End Station A workstation, server, or other device that does not act as a network interconnection. Glossary-2 Ethernet A network communication system developed and standardized by DEC, Intel, and Xerox, using baseband transmission, CSMA/CD access, logical bus topology, and coaxial cable. The successor IEEE 802. 3 standard provides for integration into the OSI model and extends the physical layer and media with repeaters and implementations that operate on fiber, thin coax and twisted-pair cable. [. . . ]