IPV4 vs IPV6 and cloudflare

[Russkil]

Using a Service that uses cloudflare which struggles to always keep connected. on making it work on my broadband i had to switch off IPv6 address allocation under http://192.168.1.254/IPv6.htm . it got me thinking why have i got to do this if EE are setting this as a Default setting on the Router(Firmware v0.44.00.04123-BT and Smarthub SH20A),

So looking at what EE are up to on there Broadband Router, there issuing out a IPV6 Address from the router to the Client machine then there is no onward travel from the router out to a IPV6 DNS Server as shown attached. Does this make sense to those that are more network savy to configure the router in this fashion?

Also when Im running https://speed.cloudflare.com/ on my phone through EE data im getting Network Quality scores that are BAD and poor any one else experiencing this?

[JimM11]

@Russkil It's a normal way to do it for ipV6 assignment, your pre defined EE DNS server is set as an ipV4 address primary and secondary server's no way you would ever be able to remember a ipV6 address, just way to long, why are you running speed test's with mobile data, are you checking 4g or 5g signal?