Appendix H. LAN and Switch Cable Installation andManagement ProceduresThis section describes the procedures you must follow when installing administrative LAN and switchcables. Failure to follow these procedures may damage network components. The objectives of theseprocedures are to:v Provide switch cables with continuous support and strain reliefv Minimize the possibility of pin damage to the SNI portsv Form consistent cable groups that comply with EMC certificationv Maintain efficient coolingPlanning information for switch cable installation is detailed in ″Appendix D. Cabling the pSeries HPS″ ofthe eServer Cluster 1600: pSeries High Performance Switch Planning, Installation, and Service Guide.Cable Installation and ManagementProcedure ConceptsIn some configurations, cables that are not properly supported have damaged the associated connectors.However, connector damage can be prevented by following the procedure described in this section. Thisprocedure must be used for installing I/O cables, administrative LAN cables, and switch cables in a M/T7040-W42 frame. This procedure is written for a frame that is fully populated with pSeries 655 nodes. Ifthe frame you are installing is not fully populated, adjust this procedure as needed.A high-level workflow for cable installation is as follows:1. Install frame2. Route all signal cables up through the tailgate3. Separate cables into groups for nodes on the left side of the frame and for nodes on the right side ofthe frameNote: Switch cables must not be connected to SNIs or switch port connection cards until the weightof each cable is fully supported.4. Make certain that switch cable groupings do not interfere with PCI adapter slots5. Make certain that the cable bend radius allows clearance for closing the rear door but is not so sharpthat it places excessive strain on the cable or the associated connectors6. Cable the frame starting with the upper nodes and working down7. Apply tailgate support for the cables from left to right8. Figure 6 on page 170 shows a block diagram of a properly cabled tailgateCable Management BracketFigure 1 on page 162 shows the tailgate assembly (refer to ″Cable management bracket and standardframe extenders″ in the Parts Catalog of the eServer Cluster 1600: pSeries High Performance SwitchPlanning, Installation, and Service Guide for part numbers).161
