I have the same issue too, but cannot confirm it's related to the interface being down:
# ifconfig wlan0 down; ip token set ::2 dev wlan0; ifconfig wlan0 up RTNETLINK answers: Invalid argument -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to iproute2 in Ubuntu. https://bugs.launchpad.net/bugs/1777010 Title: ip token set, results in: Invalid argument Status in iproute2 package in Ubuntu: Confirmed Bug description: Hi, I can't set any ipv6 token with ip command. It seems that it has a bug. Also it is not possible to set it with netplan (see bug #1737976) ~# ip token list token :: dev enp1s0 token :: dev enp2s0 token :: dev ovpn0 token :: dev br0 ~# ip token set ::2a:2a:2a:2a/64 dev br0 RTNETLINK answers: Invalid argument ~# ip token set ::2a/64 dev br0 RTNETLINK answers: Invalid argument ~# ip token set ::beef dev br0 RTNETLINK answers: Invalid argument It seems, that this Bug is really old?! https://bbs.archlinux.org/viewtopic.php?id=202757 This is really fatal, because I cant set a static ip. My prefix get mixed from my provider every x days. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: iproute2 4.15.0-2ubuntu1 ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18 Uname: Linux 4.15.0-23-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 Date: Fri Jun 15 01:26:04 2018 InstallationDate: Installed on 2018-06-12 (2 days ago) InstallationMedia: Ubuntu-Server 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: iproute2 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/iproute2/+bug/1777010/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
