Google Android isn't supporting DHCPv6 and USG is missing RDNSS

FrankLauer · March 2021

Today I learned that Android Phones don't support DHCPv6.

And indeed when I have such a phone and sniff with Whireshark I can't see any DHCPv6 requests. Therefore this is the reason why the phone can't get the DNS server addresses for IPv6.

With Windows and Linux systems everything works well, they request after a RA further information by DHCPv6.

As far a I understand Google is supporting to receive DNS addresses only by RA:

https://en.wikipedia.org/wiki/Comparison_of_IPv6_support_in_operating_systems

https://www.nullzero.co.uk/android-does-not-support-dhcpv6-and-google-wont-fix-that/

How can I configure a Zywall USG 110/210 to support this behaviour of Android phones ?

FrankLauer · March 2021

Do you plan to support RDNSS for advertising DNS servers by neighbor discovery in router advertisements as described in RFC6106 ?

https://tools.ietf.org/html/rfc6106

Here's an example of Cisco:

configure terminal

interface lan1

ipv6 nd ra dns server 2000::1 1000 sequence 0

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3650/software/release/16-12/configuration_guide/ipv6/b_1612_ipv6_3650_cg/configuring_ipv6_unicast_routing.html

PS: You should really improve the forum software to insert code styled text.

Zyxel_Can · March 2021

Hi @FrankLauer,

Thanks for your suggestion. Currently, we don’t support those features.

I will put your suggestion into Ideas category for future development evaluation.

Thanks.

Best regards.

FrankLauer · June 2023

Any news about this feature?

Google Android isn't supporting DHCPv6 and USG is missing RDNSS

Active · Last Updated April 2021

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