User manual SMC 6924VFNMM

[. . . ] TigerSwitch 100 Stackable Fast Ethernet Switch N N N N N N N N N N N 24 100BASE-FX VF-45 ports Optional 100BASE-FX or 1000BASE-X modules Optional stack module for linking up to four units 8. 8 Gbps of aggregate switch bandwidth Support for redundant power unit Up to five port trunks per switch Port mirroring for non-intrusive analysis QoS support for two-level priority Full support for IEEE 802. 1Q VLANs IP Multicasting with IGMP Snooping Manageable via console, Web, SNMP/RMON Installation Guide SMC6924VF TigerSwitch 100 Installation Guide From SMC's Tiger line of feature-rich workgroup LAN solutions 6 Hughes Irvine, CA 92618 Phone: (949) 707-2400 June 2001 Pub. # F2. 47 150727-102 R01 Information furnished by SMC Networks, Inc. (SMC) is believed to be accurate and reliable. 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. [. . . ] The TigerSwitch can serve as a collapsed backbone, providing direct connectivity for a widespread LAN. The 100 Mbps single-mode fiber module can be used to interconnect remote Fast Ethernet segments. While the Gigabit module can 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 100 stack connecting multiple segments with fiber cable. Headquarters Warehouse 4 Status Activity 1 Status Activity 1 Gigabit Links (550 meters) 3 2 1 Status Activity 1 Server Farm 100 Mbps Fiber (2 kilometers) Remote Switch Remote Switch Status Activity 1 . . . Research & Development 4 3 4 4 2 1 100 Mbps Segments . . . . . . . . . Figure 2-3. Collapsed Backbone Using Fiber Cable 2-4 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 any number of groups. Port-based VLANs are suitable for small networks. 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 Status Activity Tagged Ports Untagged Ports VLAN unaware switch Marketing Tagged Port 1 Finance VLAN 2 Testing VLAN aware switch R&D 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, or 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 Optic Cable Distance 1000BASE-T Cat. 5, 5e 100-ohm UTP 100 m (328 ft) RJ-45 Maximum 1000BASE-SX Fiber Optic Cable Distance Fiber Size 62. 5/125 micron MMF 50/125 micron MMF Fiber Bandwidth 160 MHz/km 200 MHz/km 400 MHz/km 500 MHz/km Maximum Cable Length 7-722 ft. (2-550 m) Maximum 1000BASE-LX Fiber Optic Cable Distance 1000BASE-LX Fiber Specifications Fiber Diameter 50/125 micron MMF 9/125 micron SMF Fiber Bandwidth 400 MHz/km 500 MHz/km N/A Cable Length Range 2 - 550 m (7 - 1805 ft) 2 - 550 m (7 - 1805 ft) 2 - 550 m (7 - 1805 ft) 2 m - 5 km (7 - 16, 404 ft) 62. 5/125 micron MMF 160 MHz/km Note: Although maximum cable length for 100BASE-FX fiber depends on the duplex mode, the maximum length for 1000BASE-SX fiber is the same for both half and full duplex. 2-6 NETWORK PLANNING 100 Mbps Fast Ethernet Collision Domain Maximum 100BASE-FX Fiber Optic Cable Distance 100BASE-FX 100BASE-FX 50/125 or 62. 5/125 micron core multimode fiber (MMF) Full duplex Full duplex 2 km (1. 24 miles) SC or ST 10 km (6. 21 miles) SC or ST 9/125 9 micron core single-mode fiber (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 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. ) 2-7 NETWORK PLANNING Maximum Fast Ethernet Cable Distance Cable Type Twisted Pair Fiber Connecting Any two devices Switch to switch, server or PC Half duplex Full duplex 412 m (1, 351. 4 ft. ) 2 km (1. 24 mi. ) Max. Distance 100 m (328 ft. ) 2-8 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 the attached port from being frequently partitioned due to the jamming packets. For network applications that require routing (such as when interconnecting dissimilar network types or distinct VLANs), you may have to attach the TigerSwitch 100 units directly to a router or Layer 3 switch (such as the SMC6724L3). 2-9 NETWORK PLANNING 2-10 CHAPTER 3 INSTALLING THE SWITCH Selecting a Site TigerSwitch 100 units can be mounted in a standard 19-inch equipment rack or on a flat surface. Be sure to follow the guidelines below when choosing a location. [. . . ] IEEE 802. 1Q VLAN Tagging--Defines Ethernet frame tags which carry VLAN information. It allows switches to assign endstations to different virtual LANs, and defines a standard way for VLANs to communicate across switched networks. IEEE 802. 3 Defines carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications. Glossary-3 GLOSSARY IEEE 802. 3ab Defines CSMA/CD access method and physical layer specifications for 1000BASE-T Gigabit Ethernet. IEEE 802. 3u Defines CSMA/CD access method and physical layer specifications for Fast Ethernet. [. . . ]