diff --git a/ipmi.md b/ipmi.md
index 2a377a3..65139c8 100644
--- a/ipmi.md
+++ b/ipmi.md
@@ -1,16 +1,25 @@
 # OEM-IPMI Commands to talk to Phosphor-pid-control
 
-## IPMI Command Specification
+## Sensor Data Pushing Advice
 
-The host needs the ability to send to the BMC, the margin information on the
-devices that it knows how to read that the BMC cannot. There is no command in
-IPMI that currently supports this use-case, therefore it will be added as an OEM
-command.
+For temperature sensors not reachable by the BMC, sensor readings can be
+pushed to the BMC from the host, by using the IPMI SDR as shared storage.
 
-The state of the BMC readable temperature sensors can be read through normal
-IPMI commands and is already supported.
+To do this, it is recommended that
+[ExternalSensor](https://github.com/openbmc/docs/blob/master/designs/external-sensor.md)
+be used. ExternalSensor can add virtual sensors to the IPMI SDR. The host
+can then write values to these virtual sensors, to keep them up to date. Thus,
+these sensors will become visible on the BMC, and can be used normally,
+similar to other temperature sensors already on the BMC.
 
-### OEM Set Control
+For temperature sensors on the BMC, including those added with
+ExternalSensor as mentioned above, these can be manipulated through
+normal IPMI commands, and are already supported. The same applies to fan RPM
+and PWM sensors. No additional OEM commands are required to use these.
+
+## IPMI OEM Command Specification
+
+### OEM Get/Set Control Mode
 
 A host tool needs to be able to set the control of the thermal system to either
 automatic or manual. When manual, the daemon will effectively wait to be told to
@@ -44,8 +53,8 @@
 ### OEM Get Failsafe Mode
 
 A host tool needs to be able to read back whether a zone is in failsafe mode.
-This setting is read-only because it's dynamically determined within Swampd per
-zone.
+This setting is read-only because it's dynamically determined within
+phosphor-pid-control per zone.
 
 Byte | Purpose      | Value
 ---- | ------------ | ----------------------------------