diff --git a/command/sol_cmds.hpp b/command/sol_cmds.hpp
index 3c3e23d..010a245 100644
--- a/command/sol_cmds.hpp
+++ b/command/sol_cmds.hpp
@@ -22,6 +22,45 @@
  */
 std::vector<uint8_t> payloadHandler(std::vector<uint8_t>& inPayload,
                                     const message::Handler& handler);
+
+constexpr uint8_t netfnTransport = 0x0C;
+constexpr uint8_t solActivatingCmd = 0x20;
+
+/** @struct ActivatingRequest
+ *
+ *  IPMI payload for SOL Activating command.
+ */
+struct ActivatingRequest
+{
+#if BYTE_ORDER == LITTLE_ENDIAN
+    uint8_t sessionState : 4;       //!< SOL session state.
+    uint8_t reserved : 4;           //!< Reserved.
+#endif
+
+#if BYTE_ORDER == BIG_ENDIAN
+    uint8_t reserved : 4;           //!< Reserved.
+    uint8_t sessionState : 4;       //!< SOL session state.
+#endif
+
+    uint8_t payloadInstance;        //!< Payload instance.
+    uint8_t majorVersion;           //!< SOL format major version
+    uint8_t minorVersion;           //!< SOL format minor version
+} __attribute__((packed));
+
+/** @brief SOL Activating Command.
+ *
+ *  This command provides a mechanism for the BMC to notify a remote application
+ *  that a SOL payload is activating on another channel.The request message is a
+ *  message that is asynchronously generated by the BMC. The BMC will not wait
+ *  for a response from the remote console before dropping the serial connection
+ *  to proceed with SOL, therefore the remote console does not need to respond
+ *  to this command.
+ *
+ *  @param[in] payloadInstance - SOL payload instance.
+ *  @param[in] sessionID - IPMI session ID.
+ */
+void activating(uint8_t payloadInstance, uint32_t sessionID);
+
 } // namespace command
 
 } // namespace sol