Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




103 posts

Master Geek
+1 received by user: 27


Topic # 226161 23-Dec-2017 13:36
Send private message

Hi,

 

Keen to get some view’s on my Unifi setup and some questions around roaming.

 

I have a site with 5 x UVC UAP‑AC‑PRO and a couple of the Unifi outdoor AP’s, I’m running management on a VM on a QNAP server (it’s also running my UVC Camera DVR on a separate VM)

 

The site is in the country and remote so will not have interference issues, AP’s are set to no security (Reason being it’s just serving purely internet access)

 

My question is around roaming between AP’s, it seems that Fast Roaming and Zero Handoff require wireless security to be enabled which we want to avoid, often devices get stuck to 1 AP and wont roam to the next AP until either wireless is toggled on and off, or the signal fades to nothing, so not great for the likes of mobile voice over wifi, I’m also having issues with some devices getting stuck on 2.4Ghz instead of 5.8Ghz which of should provide better throughput (however we want 2.4Ghz enabled for the reach) the radios are set to preference 5.8Ghz, SSID’s are all the same.

 

 

 

Interested in people’s opinions around roaming and preferring 5.8Ghz?


Create new topic
174 posts

Master Geek
+1 received by user: 66


  Reply # 1924136 23-Dec-2017 16:24
Send private message

First of all wireless clients decide when to roam rather than the wireless network.  If you have roaming issues look at the following:

 

  • Are the access points too close to each other?
  • Are the radio transmit powers too high?
  • Are your minimum data rates too low?

As you make a wireless network more secure generally it will take wireless clients longer to connect or reconnect to a radio.

 

UniFi Fast Roaming is a proprietary system to try to reduce the amount of time it takes a wireless client connecting to a secure wireless network.  As you have implemented open authentication (no encryption) you don't have this issue.

 

UniFi Zero Handoff is a single channel architecture (SCA) system.   This means that each radio is on the same channel so the wireless client does not instigate roams from one radio to another.  The major promoter of SCA is Meru but in the few Meru deployments I have completed to get client stability the SCA options had to be disabled.

 

As a general rule the retry and error rates will be higher in the 2.4 GHz spectrum than 5 GHz.  For voice you need retry and error rates less than 2%.

 

I would recommend having a 5 GHz SSID; "Fast" for example; and a 2.4 GHz SSID; "Slow" for example.   Connect the devices that will be transmitting voice to the 5 GHz SSID and have all other devices connect to the 2.4 GHz SSID.   Do not implement Band Steering or load balancing on the 5 GHz radio as these features will cause voice quality drops as the wireless clients roam.   

 

 


26340 posts

Uber Geek
+1 received by user: 5918

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  Reply # 1924207 23-Dec-2017 17:42
One person supports this post
Send private message

Your AP doesn't support Zero Handoff anyway so that's not an option for you. This is only supported on the gen 1 UniFi hardware and nothing newer pretty much because it's a terrible solution in 90% of use cases.

 

If you want roaming to work well you'll need to perform a site survey and adjust power levels as appropriate to ensure coverage is optimal and you don't have significant overlap (ie in most cases reduce power levels), remembering that auto on UniFi = full power.

 

 

 

 


 
 
 
 


Try Wrike: fast, easy, and efficient project collaboration software
174 posts

Master Geek
+1 received by user: 66


  Reply # 1924241 23-Dec-2017 19:35
Send private message

I would start with a 14 dBm 2.4 GHz transmit power and 17 dBm for the 5 GHz.  You can adjust as required from there.

 

If you want voice services to work correctly you will need to complete an active survey to detect latency and jitter.  This requires a professional site survey application like AirMagnet Site Survey or Ekahau Site Survey Professional.


Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

ASB first bank in New Zealand to step out with Garmin Pay
Posted 23-May-2018 00:10


Umbrellar becomes Microsoft Cloud Solution Provider
Posted 22-May-2018 15:43


Three New Zealand projects shortlisted in IDC Asia Pacific Smart Cities Awards
Posted 22-May-2018 15:14


UpStarters - the New Zealand tech and innovation story
Posted 21-May-2018 09:55


Lightbox updates platform with new streaming options
Posted 17-May-2018 13:09


Norton Core router launches with high-performance, IoT security in New Zealand
Posted 16-May-2018 02:00


D-Link ANZ launches new 4G LTE Dual SIM M2M VPN Router
Posted 15-May-2018 19:30


New Panasonic LUMIX FT7 ideal for outdoor: waterproof, dustproof
Posted 15-May-2018 19:17


Ryanair Goes All-In on AWS
Posted 15-May-2018 19:14


Te Papa and EQC Minecraft Mod shakes up earthquake education
Posted 15-May-2018 19:12


Framing Facebook: It’s not about technology
Posted 14-May-2018 16:02


Vocus works with NZ Police and telcos to stop scam calls
Posted 12-May-2018 11:12


Vista Group signs Aeon Entertainment, largest cinema chain in Japan
Posted 11-May-2018 21:41


New Privacy Trust Mark certifies privacy and customer control
Posted 10-May-2018 14:16


New app FIXR connects vehicle owners to top Mechanics at best prices
Posted 10-May-2018 14:13



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.