diff -Naur /usr/lib/python3/dist-packages/provisioningserver/drivers/power/ipmi.py.original /usr/lib/python3/dist-packages/provisioningserver/drivers/power/ipmi.py
--- /usr/lib/python3/dist-packages/provisioningserver/drivers/power/ipmi.py.original	2017-08-10 15:48:38.714878652 +0200
+++ /usr/lib/python3/dist-packages/provisioningserver/drivers/power/ipmi.py	2017-08-10 15:49:05.084809221 +0200
@@ -176,7 +176,7 @@
             'mac_address', "Power MAC", scope=SETTING_SCOPE.NODE)
     ]
     ip_extractor = make_ip_extractor('power_address')
-    wait_time = (4, 8, 12)
+    wait_time = (4, 8, 12, 16, 32)
 
     def detect_missing_packages(self):
         if not shell.has_command_available('ipmipower'):