Users Manual
46
SERVICING and TROUBLE SHOOTING (Continued)
Lesson 2: Packet Addressing
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-
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unique. This is like the VIN on your car. No matter where you register your car, the VIN stays the same and is unlike that for any other
vehicle worldwide.
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for a vast array of interconnected networks. Similar to this is the license plate on a car. Rather than attempting to search for the car by
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then by license plate number within that country. RHAON acts as the license plate authority, if a CobraNet device (RHAON speaker, mixer,
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Packets addressed by MAC address are known as “Ethernet packets”. In addition to information about the source and destination and the
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limited to being LAN-only. The structure of an IP packet is very similar, in that it contains - among other information - a source address,
a destination address, and protocol type. For RHAON, the protocol types of UDP and TCP are the ones in heavy use. Building upon
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packet, the previous layer is left behind. Once a payload type is determined, just that payload is handed off to the appropriate handler.
To better understand what takes place when RHAON tells a loudspeaker “Set Gain to -10 dB”, think of Russian nested dolls. Your com-
puter will send out the whole doll, which contains an IP doll, which contains a UDP doll, which contains an SNMP doll, which contains the
message “Set Gain to -10 dB”. When a device sends out a piece of CobraNet audio, it sends out a whole doll, which contains a CobraNet
doll, which contains the piece of audio.
With CobraNet, since both devices have a ‘burnt-in’ MAC address, communication can happen right away. For SNMP communication
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there is a device called a ‘router’ that not only contains a network switch, but can also handle the assignment of IP addresses within its
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addresses, but the end result is still the same. Your router has a static IP address assigned to it, devices ask it for an IP, and the router
obliges. For this same reason you must assign a static IP address to your computer.
Troubleshooting Tips
Since RHAON relies on standard networking communications and hardware along with CobraNet, general networking and CobraNet
troubleshooting documents can also be of assistance in solving problems. Don’t throw away any documentation related to the network
switches or CobraNet source devices.
If you are familiar with CobraNet Discovery, you may also want to install and use it as a supplement to the RHAON Network Manager.
CobraNet Discovery is a network management program similar to the RHAON Network Manager. Both are invaluable in identifying and
solving network problems.
If you don’t have CobraNet Discovery, you can download it at no cost from our ftp site,
hftp://ftp.renkus-heinz.com/Software/CNDisco345.
exe
The Discovery program was also included on the RHAON CD you received with your loudspeaker.
Содержание CF Series RHAON
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