Chromecast HD 'No Internet' message and IPv6

[Sgr99]

I have a wierd problem with my Chromecast HD connecting to an EE router via an EE extender. The Chromecast keeps giving a notification that it's lost its internet connection when it hasn't (the Chromecast very briefly says 'No Internet' in the status area then the notfication pops up). This message pops up every couple of minutes or so and ruins anything I'm watching but mainky in YouTube. Google doesn't want to know saying it's an EE problem as it doesn't happen when I connect via my phone's mobile hotspot (connected to the same wifi) or if I turn the extender off and connect to the main router (very poor signal as oppsoed to excellent with the extender on). When I look at the device in the router Hub Manager My Network, the device has hundreds of IpV6 GUAs which doesn't happen with other devices....see pics. Anyone come across and resolved this?

[DarrenDev]

@Sgr99 your broadband is incredibly unstable, and running below expected speeds. Add to this the 58 devices you have connected to your hub (most of them connected to the downstairs extender), and it's fair to say the extender is being pushed to its limits.

Someone from the hub team is taking a look to see if they can provide any input, but it's recommended that you raise a fault for the broadband via the helpdesk to help out.

[Sgr99]

Thanks Darren

I have two extenders but as you say they all seem to default to one. Any help would be useful.

Shaun

[Sgr99]

Hello

As an update I have had a fault engineer around, not sure what he did but he spent 10 mins, alas the issue still occurred. Ive been sent a replacement extender....again same issue. I am at a loss as to why this is happening. 

As a test, I plugged the chromecast HD into my PC monitor so it connects directly to the router and this issue does not replicate. There are no mulitple GUAs as in the pic above....I know the extender it usually connects to may have a lot iof things connected (home automation stuff) but this setup (with no additional devices) has worked for two years. This issue only being a recent thing. 

Whats next?

Regards

Shaun

[Peter_W]

Thanks for the update here, @Sgr99.

Have you always had this many devices connected to the extenders, or has there been a recent change to how your network is setup that would coincide with the timescales of when you've been noticing these issues?

Have you ever tried moving the location of the extender so it's closer to your main Hub, just to see if this can improve the overall stability?

Peter

[Sgr99]

Thanks Peter

Same number of devices as always. This only started arounf July time. The signal to the router is good according to the EE app (!?) and the Chromecast HD says the signal to the extender is excellent. 

There a lot of weird things going on on the networking side.....the router says I have a number if wired devices when they are actually connected to extenders....

As I say the streaming doesn't stop on the Chromecast HD it just keeps telling me its lost the internet connection every 4-5 mins...it's disrupting my enjoyment  lol.

Shaun

[Sgr99]

Not sure if this has any relevance....I don't seem to be able to turn IPv6 off on the router....is SLAAC the same as Stateless...?

https://www.reddit.com/r/Chromecast/comments/124y7de/ipv6_wifi_drop_outs_chromecast_with_google_tv/

Way above my knowledge base....:(