HP A3724A Service and User Manual (Short- and Long-Wave) - Page 21
Cascaded Long-Wave Hub Topology
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Product Description Cascaded Long-Wave Hub Topology Cascaded FC-AL, non-OFC, model L10 long-wave hubs use the long-wave port for the hubto-hub connection. The maximum supported distance between cascaded long-wave hubs with single-mode 9 micron cable is 3 km. The maximum distance between a server and FCAL devices on cascaded long-wave hubs is, therefore, 4000 meters (500 m + 3000 m + 500 m). Under certain conditions, cascaded long-wave hubs are supported up to 10,000 meters (10 km) (see page 105 for more information). The 10-km capability only applies to long-wave hubs connected to HP-UX servers. Caution When cascading long-wave hubs, only connect long-wave ports to long-wave ports or short-wave ports to short-wave ports. Ports 1 through 9 on each long-wave hub are for connections to FC-AL devices. Ports 1 through 9 can also be used in a cascaded configuration; however, the maximum distance between hubs decreases from 3000 meters to 500 meters. Figure 6 Example Topology: Cascaded Long-Wave Hubs HP-UX Server or HP NetServer 500 m NOTE: Connecting HP-UX servers and HP NetServers to the same hub is NOT a supported configuration. model L10 hub Maximum distance between server and FC-AL device = 4000 m NOTE: Under certain conditions, the maximum distance between an HP-UX server and FC-AL device can be 11,000 m. 3000 m (long-wave port to long-wave port only) model L10 hub ..... ..... FC-AL Devices 500 m FC-AL Devices Supported Topologies 19