ADDER AdderLink Infinity Manager - Appendix B: Troubleshooting; Video Image Issues (Blinding); Audio Output Issues (Crackle)

 sll




34
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 ALIF 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 ALIF 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ALIFtransmitters:
• Ifcolourqualityisimportant,thenleaveColourdepthat24bitsand
adjust other controls,
• Ifmovingvideoimagesarebeingshownfrequently,thenleaveFrame
Skipping at a low percentage and instead reduce the Peak bandwidth
limiter and Colourdepth.
• Wherescreensarequitestatic,tryincreasingtheBackgroundRefresh
interval and/or increasing the Frame skipping percentage setting.
Make changes to the ALIF 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ALIFunitsarefullyupdatedtothelatestrmwareversion(at
least v2.1).