After a successful "dnf systemd upgrade" F30->F31, I'm finding that a few of my machines which use systemd-networkd instead of NetworkManager are no longer autoconfiguring IPv6 addresses. I also noticed that even though NetworkManager is disabled, it is initiated in early boot, which I'm not sure is related.
It appears as though the system isn't assigning the link-local address and therefore can't communicate via IPv6. If anyone has any pointers on where to begin, I'd appreciate it. Thanks. -A
Both systems below use the following /etc/systemd/network/10-wired-dhcp.network:
[Match] Name=en*
[Network] DHCP=yes IPv6PrivacyExtensions=yes
A system that IS working with systemd-networkd displays the following debug output:
eno1: New device has no master, continuing without eno1: Flags change: +UP +LOWER_UP +RUNNING +MULTICAST +BROADCAST eno1: Link 2 added eno1: udev initialized link eno1: State changed: pending -> initialized eno1: Saved original MTU: 1500 eno1: Remembering foreign address: fe80::f64d:30ff:fe6e:2cf5/64 (valid forever) eno1: Gained IPv6LL eno1: Remembering route: dst: ff00::/8, src: n/a, gw: n/a, prefsrc: n/a, scope: global, table: local, proto: boot, type: unicast eno1: Remembering route: dst: fe80::f64d:30ff:fe6e:2cf5/128, src: n/a, gw: n/a, prefsrc: n/a, scope: global, table: local, proto: kernel, type: local eno1: Remembering route: dst: fe80::/64, src: n/a, gw: n/a, prefsrc: n/a, scope: global, table: main, proto: kernel, type: unicast eno1: Remembering updated address: fe80::f64d:30ff:fe6e:2cf5/64 (valid forever) eno1: Updating remembered route: dst: fe80::f64d:30ff:fe6e:2cf5/128, src: n/a, gw: n/a, prefsrc: n/a, scope: global, table: local, proto: kernel, type: local eno1: Link state is up-to-date eno1: found matching network '/etc/systemd/network/10-wired-dhcp.network' Setting '/proc/sys/net/ipv6/conf/eno1/disable_ipv6' to '0' eno1: IPv6 successfully enabled Setting '/proc/sys/net/ipv6/conf/eno1/proxy_ndp' to '0' Setting '/proc/sys/net/ipv6/conf/eno1/use_tempaddr' to '2' Setting '/proc/sys/net/ipv6/conf/eno1/accept_ra' to '0' eno1: Started LLDP. eno1: Setting address genmode for link eno1: Acquiring DHCPv4 lease eno1: Discovering IPv6 routers eno1: State changed: initialized -> configuring eno1: Acquiring DHCPv6 lease on NDisc request
Another system that is not working displays the following debug output (note the missing Remembering foreign address and Gained IPv6LL lines):
eno1: New device has no master, continuing without eno1: Flags change: +UP +LOWER_UP +RUNNING +MULTICAST +BROADCAST eno1: Link 2 added eno1: udev initialized link eno1: State changed: pending -> initialized eno1: Saved original MTU: 1500 eno1: Remembering route: dst: ff00::/8, src: n/a, gw: n/a, prefsrc: n/a, scope: global, table: local, proto: boot, type: unicast eno1: Link state is up-to-date eno1: found matching network '/etc/systemd/network/10-wired-dhcp.network' eno1: IPv6 successfully enabled eno1: Started LLDP. eno1: Setting address genmode for link eno1: Acquiring DHCPv4 lease eno1: State changed: initialized -> configuring