[FS#681] Prefix Delegation is Broken (both ULA-Prefix and DHCPv6-PD Prefix)

[LEDE Bugs]

The following task has a new comment added:

FS#681 - Prefix Delegation is Broken (both ULA-Prefix and DHCPv6-PD Prefix)
User who did this - Arjen de Korte (arjendekorte)

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If you want to support Android devices with IPv6 in your network, stateful + stateless is needed. Despite popular demand, Android refuses to implement DHCPv6, so you need SLAAC for those. Also note that as of now, DHCPv6 in Windows 10 is *still* broken (although a fix should be available in the Creators Update that is about to be released.

On Linux boxes, you may still get the desired behavior with stateful + stateless by preferring a the non-privacy address for outgoing connections:

  sysctl -w net.ipv6.conf.en0.use_tempaddr=1

Or by switching of privacy extensions completely:

  sysctl -w net.ipv6.conf.en0.use_tempaddr=0
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=681#comment2335