IPv6 DHCP6 - Request A Specific Network with PD size?
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I'm wondering if it's possible with DHCP6 to tell the server that you would like to have a specific subnet for the prefix size you're requesting. I'm having issues with Google Fiber right now where periodically my IPv6 subnet will randomly change and I'd like to at least attempt to send a hint of "hey I want this subnet along with this /56 you give me". I tried looking at the dhcp6.conf and whatnot but couldn't figure out if there was something obvious I was missing to send a hint for the subnet in addition to the PD size.
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That should happen normally, assuming your ISP supports it. I've had the same prefix for over 5 years, even though both my cable modem and the computer I run pfSense on have been replaced. There is a setting Do not allow PD/Address release on System / Advanced / Networking which should be checked to prevent release.
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@JKnott Yah I've got that checked but no dice. I'm having packet loss and there are several instances of Google Fiber having to reprovision or reboot my ONT and every time the IPv6 address changes, IPv4 sometimes too, it's really crappy.
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Sounds like your problem is with Google, not pfSense.
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@JKnott Yah but I'm still wondering if what I want to do is possible just in case. Send a subnet hint basically.
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It seems this is is what I'm looking for essentially but pfSense doesn't have anything yet at least sadly:
https://forum.netgate.com/topic/185114/does-pfsense-have-an-equivalent-feature-to-opnsense-s-ipv6-dynamic-hosts-or-negative-masks-in-iptablesEdit:
I found what I needed in opnsense and wish pfSense would bring it over too. Allow tracking of interfaces for the NPT6 table and it works just fine.
Set the inside to track the WAN and then in the NPT settings track the LAN prefix and it will nat if the WAN subnet offered changes.
