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#dhcpv6

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Erik Nygren :verified:<p>I've published the -00 for a new IETF draft: <a href="https://hachyderm.io/tags/DHCPv6" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DHCPv6</span></a> Recommended <a href="https://hachyderm.io/tags/IPv6" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>IPv6</span></a> Address Option"</p><p><a href="https://datatracker.ietf.org/doc/html/draft-nygren-dhc-recommended-ipv6-address-00" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">datatracker.ietf.org/doc/html/</span><span class="invisible">draft-nygren-dhc-recommended-ipv6-address-00</span></a></p><p>The primary use-case for this is hosting, datacenter, and cloud environments that want to assign a /64 per host but which also want to ensure the host configures one or more addresses (such as for management and running services). Operators configuring servers in these environments want to be able to ensure that a host will be available on a given /128 (for ssh'ing into, putting into DNS as a service endpoint, etc) while DHCPv6-PD also means that the host is free to use the rest of the /64 for its own purposes (eg, containers, K8s pods, temporary addresses, etc).</p>
9pfs<p>For those who specialize in DHCPv6 and systemd: Is there a way to tell the DHCPv6 server "If this IP is available, just give me it, don't give me anything else", or at least get systemd to do that? I'm trying to make an oracle cloud instance running Arch+systemd-networkd that uses DHCPv6 for IP configuration only use one of two IPs assigned to the oracle instance, but leave the other one unused so I can do NDP proxying and route it to my laptop over wireguard, giving my laptop a public IPv6 address as a result, but it appears that oracle is forcing my VPS to use both IPv6 addresses, which is not what I want.<br>Redacted logs, for context:</p><p>Jun 18 06:08:27 somewhere systemd-networkd[-1]: eth0: DHCPv6 address 2000::4201/128 (valid for 1d 5<br>9min 59s, preferred for 23h 59min 59s)<br>Jun 18 06:08:27 somewhere systemd-networkd[-1]: eth0: DHCPv6 address 2000::1337/128 (valid for 1d 5<br>9min 59s, preferred for 23h 59min 59s)</p><p>Feel free to boost this for increased visibility if you wish, and if you know of any mailing lists or IRC channels I should ask on, please let me know.<br>Relevant tags to try to help people who might know something see this:<br><a href="https://tilde.zone/tags/dhcp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dhcp</span></a> <a href="https://tilde.zone/tags/ipv6" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ipv6</span></a> <a href="https://tilde.zone/tags/systemd" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>systemd</span></a> <a href="https://tilde.zone/tags/oracle" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>oracle</span></a> <a href="https://tilde.zone/tags/dhcpv6" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dhcpv6</span></a> <a href="https://tilde.zone/tags/networking" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>networking</span></a> <a href="https://tilde.zone/tags/systemdnetworkd" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>systemdnetworkd</span></a> <a href="https://tilde.zone/tags/systemd" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>systemd</span></a>-networkd</p>
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