User manual SMC 6750L2

[. . . ] TigerSwitch 10/100 50-Port Layer 2 Switch 48 10BASE-T/100BASE-TX auto-MDI/MDI-X ports 2 auto-MDI/MDI-X 10/100/1000BASE-T combo ports with associated SFP slots Non-blocking switching architecture Support for redundant power unit Spanning Tree Protocol Up to six LACP or static 4-port trunks Layer 2/3/4 CoS support through four priority queues Full support for VLANs with GVRP IGMP multicast filtering and snooping Manageable via console, Web, SNMP/RMON Installation Guide SMC6750L2 TigerSwitch 10/100 Installation Guide From SMC's Tiger line of feature-rich workgroup LAN solutions 38 Tesla Irvine, CA 92618 Phone: (949) 679-8000 June 2002 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. [. . . ] This allows the TigerSwitch 100 to serve as a collapsed backbone, providing direct connectivity for a widespread LAN. A Gigabit SFP transceiver can also be used for a high-speed connection between floors in the same building, or to connect to other buildings in a campus setting. The figure below illustrates a TigerSwitch 10/100 connecting multiple segments with fiber cable. Headquarters Server Farm Remote Switch 25 26 1 2 3 4 5 6 13 14 15 16 17 18 Link Act Link Act 7 8 9 Self Test 10 11 12 Fan Status 19 20 21 22 23 24 1000BASE-SX MMF (500 m) Remote Switch 1 25 26 2 3 4 5 6 13 14 15 16 17 18 25 26 1 2 3 4 5 6 13 14 15 16 17 18 Link Act Link Act 7 8 9 Self Test 10 11 12 Fan Status 19 20 21 22 23 24 1000BASE-LX SMF (5 kilometers) 1 2 3 4 5 6 13 14 15 16 17 18 26 TigerStack II 10/100 6624M Console Power Fault Reset Clear 7 8 9 10 11 12 TigerStack II 10/100 6624M 25 19 20 21 22 23 24 Power Console Fault Reset Clear 7 8 9 10 11 12 19 20 21 22 23 24 10/100 Mbps Segments . . . . . . Figure 2-3. Collapsed Backbone Using Fiber Cable 2-4 SAMPLE APPLICATIONS 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 Untagged Ports VLAN unaware switch R&D Tagged Port VLAN aware switch Finance VLAN 2 Testing Marketing Finance Testing VLAN 3 VLAN 4 VLAN 3 VLAN 1 VLAN 2 Figure 2-4. Making VLAN Connections Note: When connecting to a switch that does not support IEEE 802. 1Q VLAN tags, use untagged ports. 2-5 NETWORK PLANNING Connectivity Rules When adding hubs (repeaters) to your network, please follow the connectivity rules listed below for Ethernet, Fast Ethernet, and Gigabit 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 1000BASE-T Gigabit Ethernet Cable Length Cable Type Maximum Cable Length Category 5, 5e 100-ohm UTP or STP 100 m (328 ft) Maximum 1000BASE-SX Fiber Optic Cable Distance Fiber Diameter 62. 5/125 micron multimode fiber (MMF) 50/125 micron MMF Fiber Bandwidth 160 MHz/km 200 MHz/km 400 MHz/km 500 MHz/km Cable Length Range 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 1000BASE-LX Fiber Optic Cable Distance Fiber Diameter Fiber Bandwidth Cable Length Range 2 m - 5 km (7-16, 404 ft) 9/125 micron single-mode N/A fiber (SMF) Note: Although maximum cable length for 100BASE-FX fiber depends on the duplex mode, the maximum length for 1000BASE-X fiber is the same for both half and full duplex. 2-6 CONNECTIVITY RULES 100 Mbps Fast Ethernet Collision Domain Maximum Fast Ethernet Cable Distance Type Cable Type Max. Cable Length 100 m (328 ft. ) 2 km (1. 24 miles) 20 km (12. 43 miles) 100BASE-TX Category 5 100-ohm UTP or STP 100BASE-FX 50/125 or 62. 5/125 micron core Multimode multimode fiber (MMF) 100BASE-FX 9/125 micron core single-mode fiber Single-Mode (SMF) 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 · 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) 2-7 NETWORK PLANNING 10 Mbps Ethernet Collision Domain 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) 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) 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 interrepeater links or IRLs. This distinction between populated and unpopulated segments is significant for coax networks only. 2-8 APPLICATION NOTES 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 between dissimilar network types, you can attach the TigerSwitch 10/100 units directly to a router. As a general rule the length of fiber optic cable for a single switched link should not exceed: · · Gigabit Ethernet -- 550 m (1805 ft) for multimode fiber or 5 km (16404 ft) for single-mode fiber. Fast Ethernet -- 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. 2-9 NETWORK PLANNING 2-10 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. The site should: · · · · · be at the center of all the devices you want to link and near a power outlet. be able to maintain its temperature within 0 to 50 °C (32 to 122 °F) and its humidity within 5% to 95%, non-condensing provide adequate space (approximately two inches) on all sides for proper air flow be accessible for installing, cabling and maintaining the devices allow the status LEDs to be clearly visible Make sure twisted-pair cable is always routed away from power lines, fluorescent lighting fixtures and other sources of electrical interference, such as radios and transmitters. [. . . ] Collision A condition in which packets transmitted over the cable interfere with each other. CSMA/CD CSMA/CD (Carrier Sense Multiple Access/Collision Detect) is the communication method employed by Ethernet, Fast Ethernet, or Gigabit Ethernet. End Station A workstation, server, or other device that does not forward traffic. 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. [. . . ]