Łukasz,
I wanted to do another try, but this time stay with the initial Debian installation, that is not alter /etc/network/interfaces file. So this time I just built Bookworm, then upgraded to Sid. Good news is I still cannot replicate your issue. Hopefully the issue was because of the non sid sources. All the best with your fault finding, and thanks for the fun of running up a couple of VMs. I really enjoy how VMs make testing easy. Below is my checking after building the Bookworm VM, to upgrading to sid, and then checking once again. George. # cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). source /etc/network/interfaces.d/* # The loopback network interface auto lo iface lo inet loopback # The primary network interface allow-hotplug enp1s0 iface enp1s0 inet dhcp # ip -6 a 1: lo: mtu 65536 state UNKNOWN qlen 1000 inet6 ::1/128 scope host noprefixroute valid_lft forever preferred_lft forever 2: enp1s0: mtu 1500 state UP qlen 1000 inet6 fe80::5054:ff:fe95:9109/64 scope link valid_lft forever preferred_lft forever # journalctl | grep -i ipv6 Jul 31 20:06:07 debsid1 kernel: Segment Routing with IPv6 Jul 31 20:06:07 debsid1 kernel: In-situ OAM (IOAM) with IPv6 Jul 31 20:06:07 debsid1 kernel: mip6: Mobile IPv6 =============================================================================== # nano /etc/apt/sources.list deb https://ftp.debian.org/debian/ sid contrib main non-free non-free-firmware # deb-src https://ftp.debian.org/debian/ sid contrib main non-free non-free-firmware # apt update && apt full-upgrade -y # systemctl reboot # cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). source /etc/network/interfaces.d/* # The loopback network interface auto lo iface lo inet loopback # The primary network interface allow-hotplug enp1s0 iface enp1s0 inet dhcp # ip -6 a 1: lo: mtu 65536 state UNKNOWN qlen 1000 inet6 ::1/128 scope host noprefixroute valid_lft forever preferred_lft forever 2: enp1s0: mtu 1500 state UP qlen 1000 inet6 fe80::5054:ff:fe95:9109/64 scope link proto kernel_ll valid_lft forever preferred_lft forever # journalctl | grep -i ipv6 Jul 31 20:06:07 debsid1 kernel: Segment Routing with IPv6 Jul 31 20:06:07 debsid1 kernel: In-situ OAM (IOAM) with IPv6 Jul 31 20:06:07 debsid1 kernel: mip6: Mobile IPv6 Jul 31 20:41:06 debsid1 kernel: Segment Routing with IPv6 Jul 31 20:41:06 debsid1 kernel: In-situ OAM (IOAM) with IPv6 Jul 31 20:41:06 debsid1 kernel: mip6: Mobile IPv6 On Wednesday, 31-07-2024 at 18:15 Łukasz Kalamłacki wrote: Hi, Are you able to reproduce at your side? You can verify this on VirtualBox even without DHCPv6 server. In normal circumstances you should get timeout on dhclient but the BUG causes that Debian should end immediately without timeout and with the error mentioned in the first post in syslog. So are you able to reproduce at your side? Best regards, Łukasz śr., 31 lip 2024 o 10:06 George at Clug napisał(a): Łukasz, I wonder if the issue is that you are missing "non-free-firmware" which provides the non-free drivers for things like sound, network and WiFI devices? (Hopefully you only have 'sid' sources and no sources for other versions, for example 'bookworm' or 'backports') It could help to at least add "non-free-firmware" even if there is another issue? https://gist.github.com/hakerdefo/124a37ca927018f8b52a72e316d160fa#file-sources-list Debian Sid (Unstable) complete sources.list deb https://ftp.debian.org/debian/ sid contrib main non-free non-free-firmware # deb-src https://ftp.debian.org/debian/ sid contrib main non-free non-free-firmware Uncomment the deb-src line, if you want to enable the source repos. George. On Wednesday, 31-07-2024 at 16:33 Łukasz Kalamłacki wrote: > Hi, > > I added only this to sources list: > > deb http://deb.debian.org/debian/ sid main contrib non-free > > and nothing else > > Best regards, > Łukasz > > śr., 31 lip 2024 o 00:50 George at Clug napisał(a): > > > > > > > On Wednesday, 31-07-2024 at 06:01 Łukasz Kalamłacki wrote: > > > Hello, > > > > > > > > > I detected and issue with Debian SID and DHCP for IPv6. > > > > > > > > > In my network I use DHCPv6 server which works fine on stable versions of > > > Debian or Trixie but when I add to sources.list sid source and do update > > > > Please let us know what you have added and also what you have in > > "sources.list sid source" > > > > Did you add something (or change?) something to /etc/apt/sources.list ? > > > > Did you change anything else? > > > > George. > > > > > > > > > and upgrade I get and error that: > > > > > > "Link local ipv6 for interface is not configured" in syslog and > > > systemctl is reporting failed networking service and only ipv4 > > > addressing is available. > > > > > > > > > configuration in /etc/network/interfaces > > > > > > auto enp0s3 > > > > > > iface enp0s3 inet dhcp > > > > > > iface enp0s3 inet6 dhcp > > > > > > > > > What is interesting when the system is already running I can do: > > > > > > dhclient -6 enp0s3 > > > > > > and I get ipv6 address correctly > > > > > > > > > The problem is reproducible on Virtualbox: just install testing Debian > > > and add sid to source.list and do update/upgrade in apt. > > > > > > > > > The issue is very strange because during upgrade to SID I do not see > > > installation of any networking packages. > > > > > > > > > What do you think? > > > > > > > > > Best regards, > > > > > > Łukasz > > > > > > > > > > >