diff --git a/lib/resource.txt b/lib/resource.txt
index 2d2ed87..a90b9c8 100755
--- a/lib/resource.txt
+++ b/lib/resource.txt
@@ -17,7 +17,9 @@
 ${MACHINE_TYPE}    palmetto
 ${DBUS_POLL_INTERVAL}      15s
 ${OPENBMC_REBOOT_TIMEOUT}   ${10}
-${IPMI_COMMAND}    Dbus             # Dbus/External
+# IPMI_COMMAND here is set to "External" by default. User
+# can override to "Dbus" from command line.
+${IPMI_COMMAND}    External
 
 # PDU related parameters
 ${PDU_TYPE}         ${EMPTY}
diff --git a/tox.ini b/tox.ini
index 827eedd..8b6aba8 100755
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@
     OPENBMC_USERNAME=root
     SYSLOG_IP_ADDRESS=127.0.0.1
     SYSLOG_PORT=514
-    IPMI_COMMAND=Dbus
+    IPMI_COMMAND=External
 whitelist_externals = *
 install_command = pip install {opts} {packages}
 deps = -r{toxinidir}/requirements.txt