netplan cannot set IPv6 token

Bug #1737976 reported by Justin Coffman on 2017-12-13
This bug affects 12 people
Affects Status Importance Assigned to Milestone
nplan (Ubuntu)

Bug Description


netplan contains no configuration entry that allows one to statically configure the IPv6 host ID (low 64 bits) when autogenerated (DHCPv6 stateless, SLAAC) addressing is used.

This should map to the IPv6Token entry for systemd-networkd (man, [Network] section), and the ipv6.token entry for NetworkManager (

Release and package data:

> lsb_release -rd
Description: Ubuntu 17.10
Release: 17.10

> apt-cache policy nplan
  Installed: 0.30
  Candidate: 0.30
  Version table:
 *** 0.30 500
        500 artful/main amd64 Packages
        100 /var/lib/dpkg/status

Expected behavior:


# This file describes the network interfaces available on your system
# For more information, see netplan(5).
  version: 2
  renderer: networkd
      dhcp4: yes
      dhcp6: yes
      ipv6-token: '::2'

# netplan generate
# netplan apply

# ip -6 a (truncated)
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether aa:bb:cc:dd:ee:ff brd ff:ff:ff:ff:ff:ff
    inet brd scope global dynamic ens3
       valid_lft 85186sec preferred_lft 85186sec
    inet6 fd6d:beaa:e748:4b87::2/64 scope global mngtmpaddr noprefixroute dynamic
       valid_lft 2591803sec preferred_lft 604603sec
    inet6 fe80::a8bb:ccff:fedd:eeff/64 scope link
       valid_lft forever preferred_lft forever

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in nplan (Ubuntu):
status: New → Confirmed
Thomas (t.c) wrote :

thats again bad news with netplan :(
really need this!

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