https://community.three.co.uk/t5/Broadband/NR-5103-IPV-6-or-IPV/m-p/9722#M1350 <P>By default the NR5103E firmware is set to IPv4 + IPv6 Dualstack.</P><P>I've seen some mention that certain issues can be resolved by setting to IPv4 only but I've not had any issues personally, however my NR5103E is in IP Passthrough mode to my Deco PX50 units which have IPv6 disabled by default.</P> Tue, 14 Feb 2023 12:33:25 GMT crypt0ninja 2023-02-14T12:33:25Z https://community.three.co.uk/t5/Broadband/NR-5103-IPV-6-or-IPV/m-p/9709#M1344 <P>Should the router be set to IPV 4 only or 4 and 6&nbsp;</P> Mon, 13 Feb 2023 21:44:48 GMT https://community.three.co.uk/t5/Broadband/NR-5103-IPV-6-or-IPV/m-p/9709#M1344 Dazzar 2023-02-13T21:44:48Z https://community.three.co.uk/t5/Broadband/NR-5103-IPV-6-or-IPV/m-p/9722#M1350 <P>By default the NR5103E firmware is set to IPv4 + IPv6 Dualstack.</P><P>I've seen some mention that certain issues can be resolved by setting to IPv4 only but I've not had any issues personally, however my NR5103E is in IP Passthrough mode to my Deco PX50 units which have IPv6 disabled by default.</P> Tue, 14 Feb 2023 12:33:25 GMT https://community.three.co.uk/t5/Broadband/NR-5103-IPV-6-or-IPV/m-p/9722#M1350 crypt0ninja 2023-02-14T12:33:25Z https://community.three.co.uk/t5/Broadband/NR-5103-IPV-6-or-IPV/m-p/9761#M1357 <P>Thanks mine was set to 4 when it arrived&nbsp;</P> Thu, 16 Feb 2023 02:09:16 GMT https://community.three.co.uk/t5/Broadband/NR-5103-IPV-6-or-IPV/m-p/9761#M1357 Dazzar 2023-02-16T02:09:16Z