Re: ipv6: static ipv6 address with dynamic network address possible?

[Tim Woodall <debianuser@woodall.me.uk>]

On Mon, 1 Aug 2022, Lee wrote:

> Verizon FIOS finally rolled out IPv6 in my area.  yay!  I'd like for
> my Debian server to have a static IPv6 address.. same as I have for
> IPv4.  But how to do that?
>
> I have a Netgate firewall that does a dhcp6 request for a /56 from
> Verizon, then the firewall delegates a /64 to each internal subnet.
>
> I haven't been able to figure out how to assign a static address when
> the network part might [will] change.. so I've got everything using
> managed addresses (ie. dhcp6).  So effectively the server has a static
> address, but still.. I'd rather not depend on DHCPv6
>
> Thoughts on how2?
Not sure I exactly understand what you want but you can specify the
local part of an SLAAC ipv6 address thus:

iface eth0 inet6 auto
        pre-up echo 64 >/proc/sys/net/ipv6/conf/eth0/accept_ra_rt_info_max_plen
        pre-up ip token set ::0123:4567:a9ab:cdef/64 dev eth0

The accept_ra_rt_info_max_plen only matters if you want to receive
routes other than a default route.

Tim.