HP StorageWorks 2/24 FW 07.00.00/HAFM SW 08.06.00 McDATA Products in a SAN Env - Page 214

Physical Planning Considerations 5 Routing Fiber-Optic Cables 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 illustrate port numbering and logical port 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. 5-8 McDATA Products in a SAN Environment - Planning Manual