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20 Myths of Wi-Fi Interference (Cisco)

Read the full list here.

  • Myth #1: "The only interference problems are from other 802.11 networks."
  • Myth #2: "My network seems to be working, so interference must not be a problem." 
  • Myth #3: "I did an RF sweep before deployment. So I found all the interference sources."
  • Myth #4: "My infrastructure equipment automatically detects interference."
  • Myth #5: "I can overcome interference by having a high density of access points."
  • Myth #6: "I can analyze interference problems with my packet sniffer." 
  • Myth #7: "I have a wireless policy that doesn't allow interfering devices into the premises."
  • Myth #8: "There is no interference at 5 GHz."
  • Myth #9: "I'll hire a consultant to solve any interference problems I run into."
  • Myth #10: "I give up. RF is impossible to understand."
  • Myth #11: "Wi-Fi interference doesn't happen very often."
  • Myth #12: "I should look for interference only after ruling out other problem sources."
  • Myth #13: "There's nothing I can do about interference if I find it."
  • Myth #14: "There are just a few easy-to-find devices that can interfere with my Wi-Fi."
  • Myth #15: "When interference occurs, the impact on data is typically minor."
  • Myth #16 "Voice data rates are low, so the impact of interference on voice over Wi-Fi should be minimal." 
  • Myth #17: "Interference is a performance problem, but not a security risk."
  • Myth #18: "802.11n and antenna systems will work around any interference issues."
  • Myth #19: "My site survey tool can be used to find interference problems."
  • Myth #20: "RF analysis tools are too bulky and too expensive."


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