Index: lede/package/base-files/files/etc/hotplug.d/net/00-sysctl
===================================================================
--- lede.orig/package/base-files/files/etc/hotplug.d/net/00-sysctl
+++ lede/package/base-files/files/etc/hotplug.d/net/00-sysctl
@@ -6,4 +6,6 @@ if [ "$ACTION" = add ]; then
 		sed -ne "/^[[:space:]]*net\..*\.$DEVICENAME\./p" "$CONF" | \
 			sysctl -e -p - | logger -t sysctl
 	done
+
+	[ -f /sbin/smp.sh ] && /sbin/smp.sh
 fi