Monday, September 02, 2024

IPv6 static host address inside dynamic network

I'm trying to move from a static IPv6 network to a dynamic allocation from an
ISP. The hard part is that some of my hosts have secondary addresses for
specific services to use. I need to find a way to listen to router adverts
but then manually add an alias with a static lower 64 bits. Looking for
suggestions.

FreeBSD's recent rtsold has a -A option to run a script. I don't see anything
in slaacd or dhcpleased that seems to provide anything like that.

Let me know any thoughts you have. Ideally, not rolling my own tool to monitor
the interface for a changing primary IPv6 network.

- Chris

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