I cannot verify this is working on bionic with ipv6 static addresses.
root@ubuntu:~# lsb_release -rd
Description: Ubuntu 18.04.3 LTS
Release: 18.04
root@ubuntu:~# cat /etc/cloud/build.info
build_name: server
serial: 20191021
root@ubuntu:~# uname -a
Linux ubuntu 4.15.0-66-generic #75-Ubuntu SMP Tue Oct 1 05:24:09 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux
root@ubuntu:~# apt-cache policy netplan.io
netplan.io:
Installed: 0.98-0ubuntu1~18.04.1
Candidate: 0.98-0ubuntu1~18.04.1
Version table:
*** 0.98-0ubuntu1~18.04.1 500
500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
100 /var/lib/dpkg/status
0.40.1~18.04.4 500
500 http://security.ubuntu.com/ubuntu bionic-security/main amd64
Packages
0.36.1 500
500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
root@ubuntu:~# apt-cache policy systemd
systemd:
Installed: 237-3ubuntu10.31
Candidate: 237-3ubuntu10.31
Version table:
*** 237-3ubuntu10.31 500
500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
100 /var/lib/dpkg/status
237-3ubuntu10.29 500
500 http://security.ubuntu.com/ubuntu bionic-security/main amd64
Packages
237-3ubuntu10 500
500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
root@ubuntu:~# cat /etc/netplan/50-cloud-init.yaml
# This file is generated from information provided by
# the datasource. Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
version: 2
ethernets:
interface0:
dhcp4: true
match:
macaddress: '52:54:00:12:34:00'
set-name: interface0
interface1:
dhcp4: false
dhcp6: false
addresses:
- 192.168.1.2/24
- 2001:4800:78ff:1b:be76:4eff:fe06:1000/64
match:
macaddress: '52:54:00:12:34:02'
mtu: 6666
ipv6-mtu: 5634
set-name: interface1
accept-ra: false
dhcp6-overrides:
use-mtu: false
link-local: [ ]
root@ubuntu:~# ip link show interface1
3: interface1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 6666 qdisc fq_codel state
UP mode DEFAULT group default qlen 1000
link/ether 52:54:00:12:34:02 brd ff:ff:ff:ff:ff:ff
# sysctl net.ipv6.conf.interface1.mtu
net.ipv6.conf.interface1.mtu = 6666
root@ubuntu:~# cat /run/systemd/network/10-netplan-interface1.link
[Match]
MACAddress=52:54:00:12:34:02
[Link]
Name=interface1
WakeOnLan=off
MTUBytes=6666
root@ubuntu:~# cat /run/systemd/network/10-netplan-interface1.network
[Match]
MACAddress=52:54:00:12:34:02
Name=interface1
[Network]
LinkLocalAddressing=no
Address=192.168.1.2/24
Address=2001:4800:78ff:1b:be76:4eff:fe06:1000/64
IPv6AcceptRA=no
IPv6MTUBytes=5634
# journalctl -o short-precise -b 0 | egrep -i "(MTU|interface1)"
Oct 23 21:28:47.968910 ubuntu kernel: virtio_net virtio3 interface1: renamed
from ens6
Oct 23 21:28:50.636014 ubuntu systemd-networkd[670]: Ignoring
/run/systemd/network/10-netplan-interface1.network, because it's not a regular
file with suffix .netdev.
Oct 23 21:28:50.636090 ubuntu systemd-networkd[670]: Ignoring
/run/systemd/network/10-netplan-interface1.link, because it's not a regular
file with suffix .netdev.
Oct 23 21:28:50.636706 ubuntu systemd-networkd[670]: Ignoring
/run/systemd/network/10-netplan-interface1.link, because it's not a regular
file with suffix .network.
Oct 23 21:28:50.640507 ubuntu systemd-networkd[670]: interface7: Saved original
MTU: 1500
Oct 23 21:28:50.642454 ubuntu systemd-networkd[670]: interface6: Saved original
MTU: 1500
Oct 23 21:28:50.643050 ubuntu systemd-networkd[670]: interface5: Saved original
MTU: 1500
Oct 23 21:28:50.643629 ubuntu systemd-networkd[670]: interface4: Saved original
MTU: 1500
Oct 23 21:28:50.644214 ubuntu systemd-networkd[670]: interface3: Saved original
MTU: 1500
Oct 23 21:28:50.644939 ubuntu systemd-networkd[670]: interface2: Saved original
MTU: 1500
Oct 23 21:28:50.645025 ubuntu systemd-networkd[670]: interface1: New device has
no master, continuing without
Oct 23 21:28:50.645107 ubuntu systemd-networkd[670]: interface1: Flags change:
+MULTICAST +BROADCAST
Oct 23 21:28:50.645175 ubuntu systemd-networkd[670]: interface1: Link 3 added
Oct 23 21:28:50.645456 ubuntu systemd-networkd[670]: interface1: udev
initialized link
Oct 23 21:28:50.647448 ubuntu systemd-networkd[670]: interface1: Saved original
MTU: 6666
Oct 23 21:28:50.648100 ubuntu systemd-networkd[670]: interface0: Saved original
MTU: 1500
Oct 23 21:28:50.648670 ubuntu systemd-networkd[670]: lo: Saved original MTU: 0
Oct 23 21:28:50.655303 ubuntu systemd-networkd[670]: interface1: Interface name
change detected, interface1 has been renamed to ens6.
Oct 23 21:28:50.655431 ubuntu systemd-networkd[670]: ens6: Interface name
change detected, ens6 has been renamed to interface1.
Oct 23 21:28:50.675541 ubuntu systemd-networkd[670]: interface1: Link state is
up-to-date
Oct 23 21:28:50.675782 ubuntu systemd-networkd[670]: interface1: found matching
network '/run/systemd/network/10-netplan-interface1.network'
Oct 23 21:28:50.677101 ubuntu systemd-networkd[670]: interface1: Bringing link
up
Oct 23 21:28:50.677242 ubuntu systemd-networkd[670]: interface1: IPv6
successfully enabled
Oct 23 21:28:50.683588 ubuntu systemd-networkd[670]: interface1: Link does not
request DHCPv6 prefix delegation
Oct 23 21:28:50.686958 ubuntu systemd-networkd[670]: interface1: Flags change:
+UP +LOWER_UP +RUNNING
Oct 23 21:28:50.687472 ubuntu systemd-networkd[670]: interface1: Started LLDP.
Oct 23 21:28:50.687554 ubuntu systemd-networkd[670]: interface1: Gained carrier
Oct 23 21:28:50.687842 ubuntu systemd-networkd[670]: interface1: Setting
addresses
Oct 23 21:28:50.697061 ubuntu systemd-networkd[670]: interface1: Updating
address: 192.168.1.2/24 (valid forever)
Oct 23 21:28:50.698167 ubuntu systemd-networkd[670]: interface1: Addresses set
Oct 23 21:28:52.021563 ubuntu systemd-networkd[670]: interface1: Adding
address: fe80::5054:ff:fe12:3402/64 (valid forever)
Oct 23 21:28:52.021588 ubuntu systemd-networkd[670]: interface1: Gained IPv6LL
Oct 23 21:28:52.053025 ubuntu systemd-networkd[670]: interface1: Updating
address: 2001:4800:78ff:1b:be76:4eff:fe06:1000/64 (valid forever)
Oct 23 21:28:52.053125 ubuntu systemd-networkd[670]: interface1: Configured
Oct 23 21:28:52.056906 ubuntu systemd-networkd-wait-online[691]: managing:
interface1
Oct 23 21:28:52.216772 ubuntu systemd-networkd-wait-online[691]: managing:
interface1
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https://bugs.launchpad.net/bugs/1671951
Title:
networkd should allow configuring IPV6 MTU
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