diff --git a/experimental/saiexperimentaldasheni.h b/experimental/saiexperimentaldasheni.h
index c41119448..ba91b4b55 100644
--- a/experimental/saiexperimentaldasheni.h
+++ b/experimental/saiexperimentaldasheni.h
@@ -518,6 +518,15 @@ typedef enum _sai_eni_attr_t
      */
     SAI_ENI_ATTR_OUTBOUND_ROUTING_GROUP_ID,
 
+    /**
+     * @brief Action parameter is HA flow owner
+     *
+     * @type bool
+     * @flags CREATE_AND_SET
+     * @default false
+     */
+    SAI_ENI_ATTR_IS_HA_FLOW_OWNER,
+
     /**
      * @brief End of attributes
      */
diff --git a/experimental/saiexperimentaldashha.h b/experimental/saiexperimentaldashha.h
index 75332a27a..42024fca1 100644
--- a/experimental/saiexperimentaldashha.h
+++ b/experimental/saiexperimentaldashha.h
@@ -129,6 +129,15 @@ typedef enum _sai_ha_set_attr_t
      */
     SAI_HA_SET_ATTR_DP_CHANNEL_IS_ALIVE,
 
+    /**
+     * @brief Action parameter SAI vendor driven HA switchover wait time ms
+     *
+     * @type sai_uint32_t
+     * @flags CREATE_AND_SET
+     * @default 0
+     */
+    SAI_HA_SET_ATTR_DPU_DRIVEN_HA_SWITCHOVER_WAIT_TIME_MS,
+
     /**
      * @brief End of attributes
      */
@@ -263,6 +272,50 @@ typedef enum _sai_ha_scope_attr_t
      */
     SAI_HA_SCOPE_ATTR_FLOW_RECONCILE_NEEDED,
 
+    /**
+     * @brief Action parameter VIP v4
+     *
+     * @type sai_ip_address_t
+     * @flags CREATE_AND_SET
+     * @default 0.0.0.0
+     */
+    SAI_HA_SCOPE_ATTR_VIP_V4,
+
+    /**
+     * @brief Action parameter VIP v6
+     *
+     * @type sai_ip_address_t
+     * @flags CREATE_AND_SET
+     * @default 0.0.0.0
+     */
+    SAI_HA_SCOPE_ATTR_VIP_V6,
+
+    /**
+     * @brief Action parameter admin state
+     *
+     * @type bool
+     * @flags CREATE_AND_SET
+     * @default false
+     */
+    SAI_HA_SCOPE_ATTR_ADMIN_STATE,
+
+    /**
+     * @brief Action parameter activate role
+     *
+     * @type bool
+     * @flags CREATE_AND_SET
+     * @default false
+     */
+    SAI_HA_SCOPE_ATTR_ACTIVATE_ROLE,
+
+    /**
+     * @brief Action parameter DASH HA state
+     *
+     * @type sai_dash_ha_state_t
+     * @flags READ_ONLY
+     */
+    SAI_HA_SCOPE_ATTR_DASH_HA_STATE,
+
     /**
      * @brief End of attributes
      */
diff --git a/experimental/saiswitchextensions.h b/experimental/saiswitchextensions.h
index afa6e0e4d..418f86895 100644
--- a/experimental/saiswitchextensions.h
+++ b/experimental/saiswitchextensions.h
@@ -90,6 +90,9 @@ typedef enum _sai_ha_scope_event_t
 
     /** Flow reconcile is needed */
     SAI_HA_SCOPE_EVENT_FLOW_RECONCILE_NEEDED,
+
+    /** DPU driven HA split brain detected */
+    SAI_HA_SCOPE_EVENT_SPLIT_BRAIN_DETECTED,
 } sai_ha_scope_event_t;
 
 /**
@@ -109,6 +112,9 @@ typedef struct _sai_ha_scope_event_data_t
     /** Flow version */
     sai_uint32_t flow_version;
 
+    /** HA state */
+    sai_dash_ha_state_t ha_state;
+
 } sai_ha_scope_event_data_t;
 
 /**
diff --git a/experimental/saitypesextensions.h b/experimental/saitypesextensions.h
index 578ab74b4..26594c766 100644
--- a/experimental/saitypesextensions.h
+++ b/experimental/saitypesextensions.h
@@ -145,5 +145,38 @@ typedef enum _sai_dash_ha_role_t
 
 } sai_dash_ha_role_t;
 
+/**
+ * @brief Defines a list of enums for dash_ha_state
+ */
+typedef enum _sai_dash_ha_state_t
+{
+    SAI_DASH_HA_STATE_DEAD,
+
+    SAI_DASH_HA_STATE_CONNECTING,
+
+    SAI_DASH_HA_STATE_CONNECTED,
+
+    SAI_DASH_HA_STATE_INITIALIZING_TO_ACTIVE,
+
+    SAI_DASH_HA_STATE_INITIALIZING_TO_STANDBY,
+
+    SAI_DASH_HA_STATE_PENDING_STANDALONE_ACTIVATION,
+
+    SAI_DASH_HA_STATE_PENDING_ACTIVE_ACTIVATION,
+
+    SAI_DASH_HA_STATE_PENDING_STANDBY_ACTIVATION,
+
+    SAI_DASH_HA_STATE_STANDALONE,
+
+    SAI_DASH_HA_STATE_ACTIVE,
+
+    SAI_DASH_HA_STATE_STANDBY,
+
+    SAI_DASH_HA_STATE_DESTROYING,
+
+    SAI_DASH_HA_STATE_SWITCHING_TO_STANDALONE,
+
+} sai_dash_ha_state_t;
+
 #endif /* __SAITYPESEXTENSIONS_H_ */
 
diff --git a/meta/aspell.en.pws b/meta/aspell.en.pws
index 8252e9bc1..2ce5ab705 100644
--- a/meta/aspell.en.pws
+++ b/meta/aspell.en.pws
@@ -179,6 +179,7 @@ structs
 sublayer
 subnet
 subnets
+switchover
 SysFS
 syslog
 timespec