--- pve-container/src/Makefile.lxcnetdelbr	2017-10-23 12:42:08.225637829 +0300
+++ pve-container/src/Makefile	2017-10-23 12:43:27.853741072 +0300
@@ -39,6 +39,7 @@ install: pct lxc-pve.conf lxc-pve-presta
 	install -m 0755 pve-update-lxc-config ${SBINDIR}
 	install -d ${LXC_SCRIPT_DIR}
 	install -m 0755 lxcnetaddbr ${LXC_SCRIPT_DIR}
+	install -m 0755 lxcnetdelbr ${LXC_SCRIPT_DIR}
 	install -m 0755 pve-container-stop-wrapper ${LXC_SCRIPT_DIR}
 	install -d -m0755 ${SERVICEDIR}
 	install -m0644 pve-container@.service ${SERVICEDIR}/
--- pve-container/src/lxcnetdelbr.lxcnetdelbr	2017-10-23 12:42:08.265637880 +0300
+++ pve-container/src/lxcnetdelbr	2017-10-23 12:42:08.265637880 +0300
@@ -0,0 +1,23 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+exit 0 if $ENV{LXC_NAME} && $ENV{LXC_NAME} !~ /^\d+$/;
+
+use PVE::Network;
+
+die "got unexpected argument count\n" if scalar(@ARGV) != 5;
+
+my ($vmid, $arg2, $arg3, $type, $iface) = @ARGV;
+
+die "got unexpected argument ($arg2 != net)\n" if $arg2 ne 'net';
+die "got unexpected argument ($arg3 != down)\n" if $arg3 ne 'down';
+die "got unexpected argument ($type != veth)\n" if $type ne 'veth';
+die "got unexpected environment" if $vmid ne $ENV{LXC_NAME};
+die "missing vmid parameter\n" if !$vmid;
+die "missing iface parameter\n" if !$iface;
+
+PVE::Network::tap_unplug($iface);
+
+exit 0;