diff --git a/nodes/rx300.py b/nodes/rx300.py
index b429862..58c2316 100644
--- a/nodes/rx300.py
+++ b/nodes/rx300.py
@@ -1,5 +1,11 @@
 # To be put into Colocation.
 
+# To use the serial console in iRMC, set up grub as follows:
+# GRUB_TIMEOUT=30
+# GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0,115200 console=tty0"
+# GRUB_TERMINAL=serial
+# GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"
+
 nodes['rx300'] = {
     'hostname': '172.19.138.26',
     'bundles': {