Hello Orvais,
we will contact our serice partner next week and let them do a proper analysis of the situation and hopefuly get to fix this.
Something i noticed today after i installed v10.3.1 and disabled Weak SNR Supression / Safety Net, the aps seemed to choose their channels pretty bad:
I instantly got a high amount of Channel Interference messages in XIQ. But why are they doing this? I thought there would be some sort of automation which prevends such bad channel selection. Or is this the “normal case” after doing a reboot on all aps? Never noticed this before.
Edit: never mind. They now set their channels much better. Guess they need their time to check neighbors, etc.
Hi Florian,
Water blocks radio waves in general; it happens to be particularly good at absorbing radio waves near 2.4 GHz frequency. If you have shelves full of water bottles/boxes, they would cause signal loss but NOT Co-Channel Interference (CCI).
In Co-Channel Interference, APs on the same channel will hear each other and defer. For example, if AP-1 on channel 6 hears the preamble transmission of a nearby AP-2, also transmitting on channel 6, AP-1 will defer and cannot transmit at the same time. Likewise, all the clients associated to AP-1 must also defer transmission if they hear the preamble transmission of AP-2. All these deferrals create medium contention overhead and consume valuable airtime because you have two basic service sets on the same channel that can hear each other.
Co-Channel interfence can’t be completely avoided but it can be managed with a proper WiFi design.
1- In some cases, you can move SSIDs away from 2.4GHz to 5GHz, 5GHz will provide a lot more channels and there will be a lot less chance of CCI.
2- In other cases, turning off 2.4GHz radios on some APs help. If the coverage is good, turning some 2.4GHz radios off on the APs will help reduce CCI. Before this is done, a proper site survey should be conducted to detrmine which 2.4GHz radios can be turned off to avoid converage holes.
3- Another major cause of CCI is the WiFI clients themeselves, more importantly the ones always on the move, but this can’t be avoided in your environment.
I would recommend you to contact the system integrator and ask them to perform a WiFi survey to determine the best way of reducing CCI in your network. They might need to change some AP placements/reduce the no. of 2.4GHz radios/implement a better channel plan etc. But there is a way to manage the CCI.
Let us know if you need further assistance.
Regards,
Ovais
