F30->F31 systemd-networkd no IPv6 autoconfiguration

[Anthony Joseph Messina <amessina@xxxxxxxxxxxx>]

I apologize if this isn't the right place to post this request for assistance.  I've attempted the Fedora User's list with no luck and would prefer to ask before filing a bug.

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


Both systems are running:
kernel-5.3.8-300.fc31.x86_64
systemd-243-4.gitef67743.fc31.x86_64
NetworkManager-1.20.4-1.fc31.x86_64


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

-- 
Anthony - https://messinet.com
F9B6 560E 68EA 037D 8C3D  D1C9 FF31 3BDB D9D8 99B6



_______________________________________________
systemd-devel mailing list
systemd-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/systemd-devel