topic Re: Chromebooks high latency and dropped connections in Aerohive Migrated Content

Chromebooks high latency and dropped connections

jmbmichael — Mon, 29 Jul 2019 22:37:14 GMT

We have noticed that all of our chromebooks are having connection issues. When pinging from a wired device all chromebooks have high ping rates and will randomly timeout. This is causing a major headache with online state testing as any kind of disruption in the connection causes the student to be kicked out of the test. This is only happening with chromebooks, windows laptops have perfect connections. After contacting aerohive for help numerous times over the past year all I ever get is they refer me to the chromebook guide which I have done all of that with no positive results. Is anyone else having these types of issues?

Re: Chromebooks high latency and dropped connections

dennisph — Tue, 30 Jul 2019 08:26:20 GMT

I have 6,600 Aerohive access points (AP130s) and probably 60,000 chromebooks in my school district and have no widespread issues like this. We have the occasional issue with state testing but nothing major that put me in hot seat. What access point are you using and what HiveOS? what switches do you use? Are you one access point per classroom?

Re: Chromebooks high latency and dropped connections

tandrews — Tue, 30 Jul 2019 19:31:58 GMT

I would also add... have you disabled interstation traffic? How are you handling auto updates on the Google Admin side?

Re: Chromebooks high latency and dropped connections

dennisph — Tue, 30 Jul 2019 19:40:29 GMT

Tony, I did the same thing i blocked mDNS from the chromebooks so they could not update and communicate with each other. the chromebooks multicast a lot to each other.

Re: Chromebooks high latency and dropped connections

jmbmichael — Tue, 30 Jul 2019 20:16:53 GMT

Dennis, we are still using on on premise controller on v 8.2r2c with AP's running anywhere from 6.2r1c - 8.2r2 depending on model. Mostly 230's but still some 120 and 121's around but it doesn't seem to matter the model. Network is pretty basic, all Extreme switches with chromebooks on their own vlan and everything configured according to aerohive's chromebook guide. Congestion isn't an issue either, I'm testing now with literally only a dozen or so devices active across the network and the AP that I'm testing this on only has my test chromebook attached and ping rates are still 150-1000ms with random timeouts in the mix.

Re: Chromebooks high latency and dropped connections

dennisph — Tue, 30 Jul 2019 23:59:07 GMT

Jason, I would probably run 8.2r6 on the AP230s and whatever 6.5r release they have for the AP121s but it does not sound like this is the problem. Is there any high cpu utilization on the Aerohive access point? are your switch ports access ports or trunk ports?

Re: Chromebooks high latency and dropped connections

jmbmichael — Wed, 31 Jul 2019 02:40:50 GMT

CPU utilization looks good, that is the reason we are running the older releases on the 120 and 121. We upgraded a few to a 6.5 release and the cpu spiked so high that we couldn’t even ssh to them and aerohive recommended staying in these older releases. Can anyone confirm a safe firmware on these 2 APs? Switch ports are are all tagged with wifi vlans

Re: Chromebooks high latency and dropped connections

jmbmichael — Thu, 01 Aug 2019 21:27:08 GMT

I was just told by aerohive that when pinging a chromebook it is normal to have these high ping rates and random timeouts because the chromebooks produce so much noise, and at this point there is nothing that will help any at all other than the couple of settings referred to in their chromebook guide. Could someone else run a ping from their desktop to a chromebook and let me know what you get? Thanks

Re: Chromebooks high latency and dropped connections

dennisph — Fri, 02 Aug 2019 00:19:59 GMT

I will be happy to check it out. What chromebooks are you using? is this a new roll out by the way or have you had them for a while? The chromebooks do produce alot of multicast mDNS traffic i block it in the firewall on the access but it was cause me high CPU utilization which you are not seeing.

Re: Chromebooks high latency and dropped connections

jmbmichael — Fri, 02 Aug 2019 00:35:27 GMT

This is not a new issue and it happens on every model that we have, Lenovo N23, dell 3180,etc. And we also have the firewall rules to block the mDNS traffic. Thanks

Re: Chromebooks high latency and dropped connections

dennisph — Fri, 02 Aug 2019 02:06:19 GMT

Here is what i get when I ping one of my chromebooks.