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A.4 Configuring the switches and devices
The layout is vital but so too is the configuration:
• Enable IGMP Snooping on all L2 switches.
• Ensure that IGMP Fast-Leave is enabled on all switches with Agility units connected directly to them.
• Enable the L3 switch as an IGMP Querier.
• Enable Spanning Tree Protocol (STP) on all switches and importantly also enable portfast (only) on all switch ports that have
Agility units connected.
• If any hosts will use any video resolutions using 2048 horizontal pixels (e.g. 2048 x 1152), ensure that Jumbo Frames are
enabled on all switches.
• Choose an appropriate forwarding mode on all switches. Use Cut-through if available, otherwise Store and forward.
• Optimise the settings on the Agility transmitters:
• If moving video images are being shown frequently, then leave Frame Skipping at a low percentage and instead reduce the
Peak bandwidth limiter.
• Where screens are quite static, try increasing the Background Refresh interval and/or increasing the Frame skipping
percentage setting.
Make changes to the Agility transmitters one at a time, in small steps, and view typical video images so that you can attribute
positive or negative results to the appropriate control.
• Ensure that all Agility units are fully updated to the latest firmware version (at least v3.3).
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Appendices
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