Lab.gruppen NCG-PLM Network Configuration Manual
Also see for PLM Series PLM 10000Q: Supplementary guideUser manual addendumSpecificationsQuick start
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Contents
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10 PLM Series Network Configuration Guidemay be to place a group of local switches in each“zone”, which are first interconnected to form a “localarea network” (e.g. Stage Left). These area networksare then interconnected with a main backbone. Adifferent topology for the main backbone than thatof the local area network may be chosen, dependingon your specific application and resources.Figure 5.2.6 shows an example of a combined net-work utilizing both Star and Daisy Chained switchring topologies.5.3 Ethernet Cabling LimitationsThe maximum cable length allowed between anytwo devices on a network is defined by the Ethernetprotocol and is limited to 100 meters (330 feet) forcopper connections. The term “devices” includes:The host PC running the Dolby Lake Controller•PLM Edition softwareAny switch on the network•Any access point•Any PLM•Optical fiber can be used if longer distances areneeded. Multi-mode fiber supports up to 550 meters(1800 feet) and single mode supports even longer5.2.5 Dual daisy-chained switchesThis is a hybrid that combines the ease of wiringof the daisy chain topology with the 100% avoid-ance of SPF issues in the dual redundant star/spokeconfiguration (figure 5.2.5). It is simply two “daisychained switch” networks in parallel: the primary andsecondary networks are connected independentlyusing the dual redundant mode in the PLMs.If the control computer only has one networkcard, it can be connected to only one of thenetwork layers. The solution to this situationcan be as follows:Manually disconnect from the “blue“ network•layer and connect to the “red” network layerinstead if one or more PLMs are inaccessible viathe blue network (see figure 5.2.5). This can bedone easily by using a simple hardware switchbox.A more advanced solution would be to equip•the PC with two identical network cards andappropriate drivers so that it can be connectedto both networks simultaneously.5.2.6 Other combination networksIn larger system network topologies, a good solution1000Rack1000 100010001001001001000Rack10001001001001000Rack10001001001001000Rack1000 1000100010010010010001001001001000 1000 1000Rack1000 100010010010010001001001001000 1000 1000Rack100010010010010001001001001000 1000Figure 5.2.3: Daisy chained switchesFigure 5.2.5: Dual daisy chain switch topology5 NeTwORk CONNeCTIONS aND TOPOLOgIeS |
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