HP UX 11i v2 Networking Software Attach Cable Guides & Cables, Cable Routing and Bend Limits

Attach Cable Guides & Cables

The HP Fabric cables are high performance impedance-controlled cables with protective shielding, and due to the thickness and stiffness of the cables, HP recommends that Cable Guides be installed prior to attaching cables to minimize stress on the connectors for both switch and HCA cabling.

Figure 4-12 Cable Guide with Cables

Copper cables for InfiniBand should be securely attached to the rack enclosure. HP recommends the use of a HP E7723B Cable Guide Installation Kit mounted in a horizontal fashion as depicted below in Figure 4-12 “Cable Guide with Cables”. A second Cable Guide is in the kit and it can be installed in the horizontal or vertical position to better guide & support the cables for either the switch or HCA. Cable Guide Installation Instructions are provided as a separate document included with the Cable Guides.

Bundles of cables should not be “tie-wrapped” with a tie-gun. These fasteners create pinch points on the cables that can crush the dielectric material and create impedance discontinuities. Rather, cables should be bundled using velcro strapping or other less compressive bundling techniques.

Cable Routing and Bend Limits

Pre-form the cables to the bent condition prior to installation if possible. This reduces any undue strain at the plug/receptacle connection at the time of installation.

Handling or installing an HP Fabric technology cable in a manner that results in a tight bend radius or excessive twisting can result in immediate or latent failure of the cable. The following table and sketch show the minimum bend radius to prevent problems with the cables.

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