dhcpcd (1:10.1.0-3) unstable; urgency=medium Please note that, as per upstream defaults, SLAAC uses privacy extensions. This can be changed to use EUI64 (hwaddr) instead via </etc/dhcpcd.conf>. Given how dhcpcd handles IPv4 and IPv6 stacks simultaneously, no separate inet6 line is needed in </etc/network/interfaces> as shown below. Since Debian 12 (Bookworm) dhcpcd uses Predictable Network Interface Names. Run 'sudo dmesg | grep -i renamed' to list available interface names. Before (dhclient for IPv4 and kernel SLAAC for IPv6): iface lan0 inet dhcp iface lan0 inet6 auto After (dhcpcd handles DHCPv4, DHCPv6, IPv4LL and SLAAC): iface enp4s0 inet dhcp -- Martin-Éric Racine <martin-eric.racine@iki.fi> Thu, 23 Jan 2025 16:16:52 +0200