Unifi network WiFi slow

[Velvis]

I setup a complete Ubiquiti network about 5 months ago. No complaints. They called me in because they are experience poor performance over zoom. When I got there webpages barely loaded. I did a speedtest on her Mac and it was 20/15 (they have 300/300 service). I tested my Surface Go 2 and got 45/20.
Using ethernet both of the computers tested around 300/300. (I had her restart her Mac as well.) Others in the office are having similar issues but I wasn't able to look at those computers yet.

The network consists of a USG, Cloud Key 2, Unifi 48 port switch, a few Unifi 5 port switches, and 3 nanoHDs.

She is the only one on that nanoHD near her office.

I looked though the Unifi dashboard and didnt see anything out of place.

Any suggestions?

Thanks!

 

[YeOldeStonecat]

Assuming APs are tuned nicely, the standard stuff like staggered channels on 2.4 (so AP1 on 1, AP2 on 6, AP3 on 11 for example).
Port Isolation on for the switch ports facing the APs
IGMP snooping enabled on the LAN?
Block LAN to WAN multicast enabled on the SSID?
Enable multicast enhancement IGMPv3 enabled on the SSID?

Also, routing, firewall, settings, note what is under CONNTRACK...and turn off all. At least SIP and H.323. Just note, if you use other VoIP (like phones), if they got impacted..so you can start sliding back the settings.

 

[Markverhyden]

I'm asking since you didn't mention. Did you turn off everything, including ISP modem, and then turn it all on again. That's fixed many a problem. I know someone who also had a similar problem with a relatively newly install Unifi setup. I'll see if he might shed some light.

 

[HCHTech]

What is the wifi environment like there? As @YeOldeStonecat says, tuning is important - what other networks are competing in the space? Do the APs all have home runs to the switch or are you "meshing"?

Two things you get with Ubiquiti - a ton of information from their interfaces, you just have to know what to look for.....and if that fails, support. Search through their KBs - Call them up and explain the problem - having them drag you through the obvious candidates will help educate you on their equipment and software. I learned more from those early support calls when I first started using their stuff than any other single source.

Lastly, if the problem were Zoom-specific, look to see if they have a UDP Flood Protection setting. Here is a technote I have about Sonicwall settings - something similar may apply for Ubiquiti:

-=-=-=-=-=-

Sonicwall's "UDP Flood Protection" setting can affect performance for video calls w/Zoom, Teams, etc.

To change this, go to Firewall Settings, Flood Protection, Click on the UDP button.

You can uncheck the "Enable UDP Flood Protection" box altogether, or you can leave it enabled (recommended) and increase the threshold value. The default is 1,000, but a 5,000 or 10,000 setting helps alleviate traffic issues for video calls.

-=-=-=-=-=-

 

[thecomputerguy]

I have had some success in similar situations with Ubiquiti equipment by going out and factory resetting everything and doing the setup all over again including firmware updates.