--- vzdump.bak	2010-11-25 04:44:49.000000000 +0300
+++ vzdump	2015-12-28 17:05:07.317340049 +0400
@@ -717,6 +717,19 @@
 		debugmsg ('info', "final sync $dir to $tmpdir", \*LOG);
 		run_command (\*LOG, $synccmd);
 
+		# attempt to up NETDEVs (802.1q interfaces can be exists)
+		# https://forum.openvz.org/index.php?t=msg&th=9865&goto=43129&S=86b58eb6f1cf262d5dd563aabe3df093#msg_43129
+		my $conffile = "$vzconf->{confdir}/${opt_vpsid}.conf";
+		my @ifaces_cfg=`cat $conffile | grep "^NETDEV="`;
+		foreach my $iface_str (@ifaces_cfg) {
+		  $iface_str =~ s/NETDEV=//;
+		  $iface_str =~ s/\"//g;
+		  my @ifaces = split /\s/, $iface_str;
+		  foreach my $iface (@ifaces) {
+		     system ("ifup $iface");
+		  }
+		}
+
 		if ($stopve eq 'stop') {
 		    debugmsg ('info', "restarting vps", \*LOG);
 		    run_command (\*LOG, "$vzctl start $vpsid");