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APPENDIX D - Tips for success when networking Agility units
Agility units use multiple strategies to minimize the amount of data that they send across networks. However, data overheads
can be quite high, particularly when very high resolution video is being transferred, so it is important to take steps to maximize
network efficiency and help minimize data output. The tips given in this section have been proven to produce very beneficial
results.
SUMMARY OF STEPS
• Choose the right kind of switch.
• Create an efficient network layout.
• Configure the switches and devices correctly.
CHOOSING THE RIGHT SWITCH
switches are what bind all of the hosts together in the subnet. However, they are all not created equally, so choose
carefully. In particular look for the following:
• Gigabit (1000Mbps) or faster Ethernet ports,
• Support for
• Support for
up to 9216-byte size,
• High bandwidth connections between switches, preferably Fiber Channel.
• Look for switches that perform their most onerous tasks (e.g.
) using multiple dedicated processors (ASICS).
• Ensure the maximum number of concurrent ‘snoopable groups’ the switch can handle meets or exceeds the number of Agility
transmitters that will be used to create multicast groups.
• Check the throughput of the switch: Full duplex, 1Gbps up- and down- stream speeds per port.
• Use the same switch make and model throughout a single subnet.
• You also need a
switch. Ensure that it can operate efficiently as an
CREATING AN EFFICIENT NETWORK LAYOUT
Network layout is vital. The use of
also introduces certain constraints, so take heed:
• Keep it flat. Use a basic line-cascade structure rather than a pyramid or tree arrangement.
• Keep the distances between the switches as short as possible.
• Ensure sufficient bandwidth between switches to eliminate bottlenecks.
• Where the IPATH Agility Controller is used to administer multiple Agility transceivers, ensure the IPATH Agility Controller and all
Agility units reside in the same subnet.
• Do not use VGA converters, instead replace VGA video cards in older systems with suitable DisplayPort or HDMI replacements.
Converters cause Agility TX units to massively increase data output.
• Wherever possible, create a private network.