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Physical Planning Considerations
5
Routing Fiber-Optic
Cables
McDATA Products in a SAN Environment - Planning Manual
5-8
Follow a logical plan for routing fiber-optic cables to avoid confusing
connections during installation and operation. Route cables from the
access holes at the bottom of the Fabricenter equipment cabinet to
fabric element ports. When routing cables to ports be aware:
•
In a Fibre Channel Protocol (FCP) environment, ports are
numbered by physical port number.
•
In a fibre connection (FICON) environment, ports are numbered
by logical port address. The translation between physical port
number and logical port address varies by equipment type and
original equipment manufacturer (OEM).
Figure 3-17
and
Figure 3-18
addressing for the Intrepid 6140 Director. Although the figures depict
a UPM card map only for the Intrepid 6140 Director, physical port
numbers and logical port addresses can be extrapolated for other
switch products.
Leave enough slack in the cables to allow cable movement for FPM
card, UPM card, XPM card, LIM, or SFP optical transceiver removal
and replacement or possible rerouting of the cable to another port.
After cables are routed and connected, secure the cables to the sides
of the cabinet using cable ties provided. When routing fiber-optic
cables and estimating cable lengths, consider:
•
Cable routing inside the equipment cabinet to different port
locations, and installation position of the director or switch (top
or bottom of the cabinet). Plan for 1.0 meter (39.37 inches) of extra
cable for routing through restraint mechanisms and rerouting
cables to other ports.
•
Cable routing outside the equipment cabinet. Plan for 1.5 meters
(5 feet) of cable outside the cabinet to provide slack for service
clearance, limited cabinet movement, and inadvertent cable pulls.
•
Cabling distance to servers, storage devices, and directors (for
multiswitch fabric support).
The need for additional fiber-optic cabling could grow rapidly. More
cables may be required for connections to additional servers or
storage devices, or for connections to additional fabric elements as a
multiswitch fabric is developed. The director or switch may need to
be moved for more efficient connection to other units but still
maintain its original connections. To account for these possibilities,
consider installing excess fiber-optic cables.
illustrate port numbering and logical port
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