No. That's the short of it.
Longer version starts with me setting up my new Ubuntu server and deciding to use netplan
to setup network interfaces. Nothing too big. Just a few bonds here and there. And all seemed fine until I tried to setup email and noticed the following message in syslog:
postfix/smtp[49721]: connect to alt1.aspmx.l.google.com[209.85.146.27]:25: Connection timed out
postfix/smtp[49721]: connect to aspmx5.googlemail.com[2607:f8b0:4002:c08::1b]:25: Network is unreachable
Once I double-checked, I noticed syslog was right - I only had link-local address assigned to interface. Ok, so DHCPv6 only turns on DHCP and not prefix delegation I use for my network. Easy-peasy, that's surely matter of just turning on the correct setting...
Or finding a matching bug. Yep, prefix delegation that's perfectly valid and well supported IPv6 address allocation method is not supported.
But ticket did solve my problem. As advised, I simply reverted to use networkd
(don't forget to use systemctl enable systemd-networkd
).
PS: Here are my networkd files that work with IPv6 PD.
/etc/systemd/network/10-bond0.netdev[NetDev]
Name=bond0
MACAddress=00:25:90:ba:31:40
Kind=bond
[Bond]
Mode=802.3ad
LACPTransmitRate=fast
MIIMonitorSec=100ms
TransmitHashPolicy=layer2+3
/etc/systemd/network/10-bond0.network[Match]
Name=bond0
[DHCP]
RouteMetric=100
UseMTU=true
[Network]
DHCP=yes
IPv6PrefixDelegation=yes
IPv6PrivacyExtensions=true
LinkLocalAddressing=ipv6
ConfigureWithoutCarrier=yes
/etc/systemd/network/11-eno1.network[Match]
PermanentMACAddress=00:25:90:ba:31:40
[Network]
Bond=lan
/etc/systemd/network/12-eno2.network[Match]
PermanentMACAddress=00:25:90:ba:31:41
[Network]
Bond=lan