HP Surestore S10 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

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Supported Topologies
19
Product Description
Cascaded Long-Wave Hub Topology
Cascaded FC-AL, non-OFC, model L10 long-wave hubs use the long-wave port for the hub-
to-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 FC-
AL 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
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3000 m (long-wave port to long-wave port only)
500 m
500 m
FC-AL Devices
FC-AL Devices
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.
HP-UX Server
or
HP NetServer
NOTE: Connecting HP-UX
servers and HP NetServers
to the same hub is NOT
a supported configuration.
model L10 hub
model L10 hub