IPV4 vs IPV6 and cloudflare

Russkil
Investigator
Investigator

‎09-02-2025 10:26 AM

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?

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3 REPLIES 3
JimM11
Brilliant Contributor
Brilliant Contributor

‎09-02-2025 04:31 PM - edited ‎09-02-2025 04:32 PM

@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? 

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NEILGUNN
Investigator
Investigator

‎31-05-2025 05:16 PM

Hi Russkil

I'm not sure if my issue (https://community.ee.co.uk/t5/Broadband-Landline/Very-slow-response-from-one-website-on-Windows-PC-i...) is the same as you are describing. I use a service that uses CLOUDFLARE and have been having a lot of connectivity issues when accessing from my Windows PC (timeouts). All other websites etc fine.

After a lot of calls to EE (apparently nothing wrong) and a trawl around the CLOUDFLARE community I've seen that others are having similar issues when accessing CLOUDFLARE serves applications accessed from EE/BT broadband. IPv6 seems to be mentioned a lot and switching it off on my SH2 has pretty much cured the problem.

I switched IPv6 back on - problem returns, off and it works fine.

I'm not sure where the problem lies EE/BT or Cloudflare ...but so far I'm not getting anybody interested in solving it!

Frustrated...

Neil

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Russkil
Investigator
Investigator
In response to NEILGUNN

‎31-05-2025 07:40 PM

https://community.ee.co.uk/t5/Mobile-Data/ee-mobile-network-congestion/m-p/1505292#M159124 -using combination of ns lookup and winmtr version 1.0 (has ipv6 support) you can clearly see what issue i had over mobile data.

the winmtr is likely to point the finger. if you have control of the cloudflare instance you can turn off ipv6 i believe

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