10-02-2017 11:37 PM - edited 10-02-2017 11:40 PM
Trying to understand/solve a 5Ghz dissapearing issue.
I have installed many home wifi networks (over 50 homes) over the past few months and have realized I have a very specific issue that keeps repeating itself in many of the homes.
Currently I mostly use WAP750AC Acces points used in "Access Point" mode which are wired to the central router. Unfortunaly our home here are build with lots of hi density concreate and lots of steal reinforcement and so signal quality from one room to the next is very poor at the best of times. Thus we use multiple access points on the same floor in different rooms to make sure we have a consistant 5GHz coverage. We avoid 2.4GHz due to high home cluster building and too much cross channel interfernce from all the homes having big routers trying to boost signals everywhere (you can see most of the time over 50 wifi networks when using a "Wifi Analyzer"). 2.4GHz is only used when 5GHz is not possible. For 80% of the cases this works 100% and performance is amazing.
Now for the issue. If you have too many AP's in close proximity (about 3 AP units needed to covery weak spots), then from time to time the 5GHz radio with shutdown (dissapear) on the AP's (sometimes all and sometimes only individual AP's). What I have found is if I change the channel width from "Auto" (which mostly runs at 80MHz width) down to 40MHz width on all the AP's, then the 5GHz is stable and we have no issues.
Then recently we started using the RE6500 (with new 1.07 firmware can be used a "Access Point" mode) in combination with the WAP750AC's as the RE6500 gives us a few switch ports for wired devices. Now the above problem is worse and need to switch the channel width to 20MHz. In 99% of the time this will work but still have the occasional 5GHz dissapearing and need to restart the AP's.
Some points to consider which I need to mention:
My question is:
Sorry for the long message but need to try be very clear on the problem.
10-03-2017 01:14 PM - edited 10-03-2017 01:17 PM
My question is:
- Why does this happen? It could be that the "auto" channel setting is force the APs' to change to a channel that doesn't work in the locations country code. Another thing could be that you are setting all APs' to the same channel when specifying channels. I recommned alternating AP channels frequency by distance suing 2.4Ghz channels 3,6 for 40Mhz and 36,149 for 5Ghz 80Mhz.
- Does the unit have this functionality to shutdow 5GHz radio or is this a bug? AFAIK it only has the capability to change the channel in "auto" channel setting or if another FCC rule forces it to change like the 40Mhz co-existense rule which will auto drop the 2.4Ghz to 20Mhz if a SSID with 40Mhz is detected or DFS change channel on radar detection.
- Is it normal or only on Linksys? I think these days it happens with most manufactures except those that ignore the FCC rules.
- Can this be fixed on firmware level? Yes but you are already running the latest firmwares for your hardware. The WRT1900ACS router will allow you to use the advance open source firmware LEDE\OpenWRT, DD-WRT and McDebian for fine control over it's firmware and advance features. I've implemented WRT1900ACSs' with McDebian so I didn't have expensive licensing cost and the flexibility to do what I want with the unit. If your customer can afford expensive hardware and yearly licensing feases the Cisco Meraki would be best for those very rich.
- Is anyone else having the same issue? I don't see many reports of the WAP750AC or RE6500 having this issue in the forum with there recent firmware releases.
10-04-2017 01:16 AM
Thanks for the reponse. Trying to give more info below:
11-02-2017 08:53 AM
I am having this problem also. The 5Ghz band either drops power or dissapears all together if I have it set to 80 Mhz with AC. If i drop the band to A/N only (so no AC) then it becomes stable.
I have done wifi analyser test to make sure there are no other routers/APs using the same channels.
11-03-2017 09:53 PM
Manually selecting a channel/frequency does work sometime but have found that also to fail.
I am working with Linksys trying to get them to solve the issue but as no one so far can replicate the problem consistantly, so to have they not been able to replicate.
Where are you located and how many AP's are you using on the same network?
11-04-2017 01:09 AM
11-05-2017 08:19 AM
RE6500 has two issues accourding to me.
Would be interesting if you are experiencing the second point as well. Please have a look at the videos in this link and let me know if you can replicate the second point:
(Sent private message with Google link as I cannot do it here)
Here in Middle East we face this problem on all RE6500's with SKU "ME".
As for the WAP750AC, same issue for dissapearing 5GHz.