diff --git a/command/session_cmds.hpp b/command/session_cmds.hpp
index 9737fdb..d5d394b 100644
--- a/command/session_cmds.hpp
+++ b/command/session_cmds.hpp
@@ -9,6 +9,10 @@
 
 constexpr uint8_t IPMI_CC_INVALID_PRIV_LEVEL = 0x80;
 constexpr uint8_t IPMI_CC_EXCEEDS_USER_PRIV = 0x81;
+// bits 30 & 31 (MSB) hold the instanceID, hence shifting by 30 bits
+constexpr uint8_t myNetInstanceSessionIdShiftMask = 30;
+// bits 6 & 7 (MSB) hold the instanceID, hence shifting by 6 bits
+constexpr uint8_t myNetInstanceSessionHandleShiftMask = 6;
 
 /**
  * @struct SetSessionPrivLevelReq
@@ -74,9 +78,6 @@
 std::vector<uint8_t>
     setSessionPrivilegeLevel(const std::vector<uint8_t>& inPayload,
                              const message::Handler& handler);
-
-constexpr uint8_t IPMI_CC_INVALID_SESSIONID = 0x87;
-
 /**
  * @struct CloseSessionRequest
  *