Comment 0 for bug 1718227

when network is configured with ifupdown, scripts in /etc/network/ifup.d/ were called on network being brought up and /etc/network/ifdown.d were called on network being brought down.

Any packages that shipped these hooks need to be verified to have the same functionality under a netplan configured system.

$ apt-file search /etc/network/if-up | sed 's,: .*,,' | sort -u
aiccu
aoetools
avahi-autoipd
avahi-daemon
bind9
chrony
clamav-freshclam
controlaula
epoptes-client
ethtool
guidedog
htpdate
ifenslave
ifmetric
ifupdown-extra
ifupdown-multi
ifupdown-scripts-zg2
isatapd
lprng
miredo
mythtv-backend
nslcd
ntpdate
openntpd
openresolv
openssh-server
openvpn
postfix
quicktun
resolvconf
sendmail-base
shorewall-init
sidedoor
slrn
slrnpull
tinc
ubuntu-fan
ucarp
uml-utilities
uruk
vlan
vzctl
wide-dhcpv6-client
wpasupplicant

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: netplan (not installed)
ProcVersionSignature: Ubuntu 4.12.0-11.12-generic 4.12.5
Uname: Linux 4.12.0-11-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: GNOME
Date: Tue Sep 19 10:53:08 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-07-23 (789 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: plan
UpgradeStatus: No upgrade log present (probably fresh install)