I am looking for some help getting IPv6 configured properly on a Fedora 27 system. I have one system which was installed fresh with Fedora 27, that system is working properly, it receives both IPv4 and IPv6 addresses assigned by my router (running latest LEDE release). I have a second system which receives the expected IPv4 address but does not receive an IPv6 address.
I notice that on the working system NetworkManager shows two instances of dhcp client: $ systemctl status NetworkManager ● NetworkManager.service - Network Manager Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled) ... CGroup: /system.slice/NetworkManager.service ├─10930 /usr/sbin/NetworkManager --no-daemon ├─10991 /sbin/dhclient -d -q -sf /usr/libexec/nm-dhcp-helper -pf /var/run/dhclient-enp0s25.pid -lf /var/lib/Netwo └─11106 /sbin/dhclient -d -q -6 -N -sf /usr/libexec/nm-dhcp-helper -pf /var/run/dhclient6-enp0s25.pid -lf /var/li
On the system with no working IPv6 address the second entry which begins "/sbin/dhclient -d -q -6" is not present: CGroup: /system.slice/NetworkManager.service ├─9804 /usr/sbin/NetworkManager --no-daemon ├─9872 /sbin/dhclient -d -q -sf /usr/libexec/nm-dhcp-helper -pf /var/run/dhclient-enp3s4f0.pid -lf /var/lib/Netwo └─9875 /sbin/dhclient -d -q -sf /usr/libexec/nm-dhcp-helper -pf /var/run/dhclient-enp3s4f1.pid -lf /var/lib/Netwo
(In both cases the dhclient arguments are truncated, ran off the edge of my terminal)
This is from the ifcfg file for the primary interface, it seems to have the correct IPv6 settings, at least I do not see anything obviously different than the working system:
# IPv4 settings BOOTPROTO=dhcp # Not sure this is needed, doc says PPP only DEFROUTE=yes IPV4_FAILURE_FATAL=yes PEERDNS=yes PEERROUTES=yes
# IPv6 settings IPV6INIT=yes IPV6_AUTOCONF=yes IPV6_DEFROUTE=yes IPV6_FAILURE_FATAL=no #IPV6_ADDR_GEN_MODE=stable-privacy #IPV6_PRIVACY=rfc3041 #IPV6_PRIVACY_PREFER_PUBLIC_IP=yes IPV6_PEERDNS=yes IPV6_PEERROUTES=yes DHCPV6C=yes
# Firewall settings ZONE=FedoraWorkstation
One thing odd that I note in the messages file:
NetworkManager[9804]: <warn> [1520343008.2540] dhcp6 (enp3s4f1): request timed out NetworkManager[9804]: <info> [1520343008.2542] dhcp6 (enp3s4f1): state changed unknown -> timeout NetworkManager[9804]: <info> [1520343008.2638] dhcp6 (enp3s4f1): canceled DHCP transaction, DHCP client pid 9916 NetworkManager[9804]: <info> [1520343008.2638] dhcp6 (enp3s4f1): state changed timeout -> done
enp3s4f1 is a secondary interface, I may not have the DHCPv6 server setup correctly to hand out addresses on that interface. I see no dhcp6 messages for enp3s4f0. Is there a bug that would cause dhcp6 client to stop if the first interface timed out rather than moving on to the next interface?
thanks for any help, Chris C