I'm in the process of setting up a new router, and it struck me that 802.11n has been out for almost 10 years now, and I don't have any b/g devices anymore.
That said, I've heard that all greenfield mode does is prevent b/g devices from connecting and slowing everyone else down, and that performance is the same as compatibility mode when only n/ac devices are connected. Is that true, or are there actual benefits to using it?
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Performance of greenfield mode will be slightly better because certain things won't be transmitted twice (like legacy preamble and HT preamble) but that does not have a significant negative effect on throughput.
There is another thing worth mentioning here - it's not about you not having b/g devices anymore - it's about any of the neighbors that have Wi-Fi networks overlapping with yours having b/d devices or not having them - their devices also "understand" RTS/CTS frames that are sent in mixed mode.
All in all - greenfield mode does not offer much in terms of performance gains but enabling it might cause issues even if legacy devices are being used on a different network (not yours but with overlapping or the same channel)Charles P. Jefferies, ALLurGroceries, Peon and 1 other person like this. -
Charles P. Jefferies likes this.
802.11n greenfield mode?
Discussion in 'Networking and Wireless' started by Peon, Sep 12, 2018.