diff --git a/mtce-common/src/common/alarmUtil.h b/mtce-common/src/common/alarmUtil.h
index c2f7faed..49430740 100644
--- a/mtce-common/src/common/alarmUtil.h
+++ b/mtce-common/src/common/alarmUtil.h
@@ -2,7 +2,7 @@
 #define __ALARMUTIL_H__
 
 /*
- * Copyright (c) 2013, 2016 Wind River Systems, Inc.
+ * Copyright (c) 2013, 2016, 2024 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
@@ -31,6 +31,7 @@
 
 #define SWERR_ALARM_ID       ((const char *)"200.000") /* Do No Use */
 #define LOCK_ALARM_ID        ((const char *)"200.001")
+#define MTCALIVE_ALARM_ID    ((const char *)"200.003")
 #define ENABLE_ALARM_ID      ((const char *)"200.004")
 #define MGMNT_HB_ALARM_ID    ((const char *)"200.005")
 #define PMOND_ALARM_ID       ((const char *)"200.006")
diff --git a/mtce-common/src/common/fitCodes.h b/mtce-common/src/common/fitCodes.h
index 91009e42..d5a0480c 100644
--- a/mtce-common/src/common/fitCodes.h
+++ b/mtce-common/src/common/fitCodes.h
@@ -120,6 +120,7 @@
 #define FIT_CODE__FORCE_LOCK_HOST                    (32)
 #define FIT_CODE__UNLOCK_HOST                        (33)
 #define FIT_CODE__FAIL_SWACT                         (34)
+#define FIT_CODE__FAIL_PXEBOOT_MTCALIVE              (35)
 
 #define FIT_CODE__FM_SET_ALARM                       (40)
 #define FIT_CODE__FM_GET_ALARM                       (41)
diff --git a/mtce-common/src/common/nodeBase.h b/mtce-common/src/common/nodeBase.h
index 5a14eeb9..3fc4e867 100755
--- a/mtce-common/src/common/nodeBase.h
+++ b/mtce-common/src/common/nodeBase.h
@@ -223,6 +223,10 @@ typedef enum
 #define MTC_JSON_SEVERITY      "severity"
 #define MTC_JSON_SENSOR        "sensor"
 #define MTC_JSON_PROCESS       "process"
+#define MTC_JSON_FEATURES      "features"
+
+/* Used by the mtcCLient with the MTC_JSON_FEATURES label above */
+#define MTC_PXEBOOT_MTCALIVE   "pxeboot_mtcAlive"
 
 /* Mtce Info Keys */
 #define MTCE_INFO_KEY__BMC_PROTOCOL "bmc_protocol"
@@ -614,6 +618,7 @@ typedef struct
 #define MTC_SERVICE_PMOND               (0xB00BF00D)
 #define MTC_SERVICE_HWMOND              (0xF00BF00D)
 #define MTC_SERVICE_HEARTBEAT           (0xBABEF00D)
+#define MTC_SERVICE_MTCCLIENT           (0xABCDF00D)
 
 /** process to process loopback command */
 #define MTC_EVENT_LOOPBACK              (0x01010101)
diff --git a/mtce/src/alarm/alarm.h b/mtce/src/alarm/alarm.h
index a9895ac4..f20e640a 100644
--- a/mtce/src/alarm/alarm.h
+++ b/mtce/src/alarm/alarm.h
@@ -2,7 +2,7 @@
 #define __INCLUDE_ALARM_H__
 
 /*
- * Copyright (c) 2016-2017 Wind River Systems, Inc.
+ * Copyright (c) 2016-2017, 2024 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
@@ -14,38 +14,17 @@
   */
 
 #include "nodeBase.h"
-#include "nodeUtil.h"      /* for ... common utilities                     */
-
+#include "nodeUtil.h"     /* for ... common utilities             */
+#include "alarmUtil.h"    /* for ... common alarm definitions     */
 #include "msgClass.h"     /* for ... msgClassSock type definition */
 
 /* external APIs */
 #include "fmAPI.h"
 
-#define ENTITY_PREFIX        ((const char *)"host=")
-
 #define MAX_ALARM_REQ_PER_MSG                (4)
 #define MAX_ALARM_REQ_MSG_SIZE               (500)
 #define MAX_ALARM_REQ_SIZE                   (MAX_ALARM_REQ_PER_MSG*MAX_ALARM_REQ_MSG_SIZE)
 
-#define SWERR_ALARM_ID       ((const char *)"200.000") /* Do No Use */
-#define LOCK_ALARM_ID        ((const char *)"200.001")
-#define ENABLE_ALARM_ID      ((const char *)"200.004")
-#define MGMNT_HB_ALARM_ID    ((const char *)"200.005")
-#define PMOND_ALARM_ID       ((const char *)"200.006")
-#define SENSOR_ALARM_ID      ((const char *)"200.007") /* Sensor read alarm ; i.e. the sensor read value bad  */
-#define CLSTR_HB_ALARM_ID    ((const char *)"200.009")
-#define BM_ALARM_ID          ((const char *)"200.010")
-#define CONFIG_ALARM_ID      ((const char *)"200.011")
-#define CH_COMP_ALARM_ID     ((const char *)"200.013") /* Combo Host Compute Failure - on last Controller     */
-#define SENSORCFG_ALARM_ID   ((const char *)"200.014") /* Sensor configuration alarm ; i.e. could not add     */
-#define SENSORGROUP_ALARM_ID ((const char *)"200.015") /* Sensor Group Read Error                             */
-#define LUKS_ALARM_ID        ((const char *)"200.016") /* LUKS volume failure alarm                           */
-
-#define EVENT_LOG_ID         ((const char *)"200.020")
-#define COMMAND_LOG_ID       ((const char *)"200.021")
-#define STATECHANGE_LOG_ID   ((const char *)"200.022")
-#define SERVICESTATUS_LOG_ID ((const char *)"200.023") /* log used to report service failure events against   */
-
 
 /** Heartbeat Alarm Abstract Reference IDs */
 typedef enum
@@ -85,17 +64,6 @@ int  alarm_log          ( string hostname, const char * id_ptr, string entity );
 #else
 
 
-typedef struct
-{
-    SFmAlarmDataT alarm ;
-    string         name ;
-    string instc_prefix ; /* Instance prefix i.e. "=sensor." or "=process." */
-    string critl_reason ;
-    string minor_reason ;
-    string major_reason ;
-    string clear_reason ;
-} alarmUtil_type ;
-
 typedef struct
 {
     string  alarmid   ;
@@ -133,10 +101,6 @@ echo "${STR}" | socat - ${PROTOCOL}:${ADDRESS}:${port}
 void             alarmData_init ( void );
 alarmUtil_type * alarmData_getAlarm_ptr ( string alarm_id_str );
 
-/* in alarmUtil.cpp */
-// EFmAlarmSeverityT mtcAlarm_state ( string hostname, alarm_id_enum id );
-
-
 /* in alarmHdlr.cpp */
 int alarmHdlr_request_handler ( char * msg_ptr );
 
@@ -144,21 +108,6 @@ void alarmMgr_queue_clear ( void );
 void alarmMgr_queue_alarm (queue_entry_type entry);
 void alarmMgr_service_queue(void);
 
-/* Clear all alarms against this host */
-void alarmUtil_clear_all ( string hostname );
-
-/**
- *  Query the specified alarm severity level.
- *  Severity levels are specified in fmAPI.h
- **/
-EFmAlarmSeverityT alarmUtil_query ( string hostname,
-                                    string identity,
-                                    string instance );
-
-int alarmUtil_query_identity ( string          identity,
-                               SFmAlarmDataT * alarm_list_ptr,
-                               unsigned int    alarms_max );
-
 int alarmUtil_clear        ( string hostname, string alarm_id, string entity );
 int alarmUtil_critical     ( string hostname, string alarm_id, string entity, FMTimeT & timestamp );
 int alarmUtil_major        ( string hostname, string alarm_id, string entity, FMTimeT & timestamp );
diff --git a/mtce/src/common/nodeClass.cpp b/mtce/src/common/nodeClass.cpp
index 4d5e7d47..f9e2fe36 100755
--- a/mtce/src/common/nodeClass.cpp
+++ b/mtce/src/common/nodeClass.cpp
@@ -19,7 +19,7 @@
 #include <errno.h>  /* for ENODEV, EFAULT and ENXIO */
 #include <unistd.h> /* for close and usleep */
 #include <algorithm>
-
+#include <json-c/json.h> /* for ... json_tokener_parse and other json utils */
 using namespace std;
 
 #ifdef  __AREA__
@@ -564,6 +564,11 @@ nodeLinkClass::node* nodeLinkClass::addNode( string hostname )
     ptr->mtcAlive_clstr = false ;
     ptr->mtcAlive_pxeboot = false ;
 
+    /* Assume the node's mtcClient does not support pxeboot mtcAlive
+     * messaging until that mtcClient reports that it does.
+     * This bool blocks the pxeboot_mtcAlive_monitor fsm. */
+    ptr->pxeboot_mtcAlive_supported = false ;
+
     /* These counts are incremented in the set_mtcAlive member
      * function and cleared in the reset progression handler. */
     ptr->mtcAlive_mgmnt_count = 0 ;
@@ -574,8 +579,9 @@ nodeLinkClass::node* nodeLinkClass::addNode( string hostname )
     for (int i = 0 ; i < MTCALIVE_INTERFACES_MAX ; i++)
     {
         ptr->mtcAlive_sequence[i] =
+        ptr->mtcAlive_loss_count[i] =
         ptr->mtcAlive_sequence_save[i] =
-        ptr->mtcAlive_sequence_miss[i] =
+        ptr->mtcAlive_miss_count[i] =
         ptr->mtcAlive_log_throttle [i] = 0 ;
     }
     ptr->pxeboot_mtcAlive_not_seen_log_throttle = 0 ;
@@ -1886,6 +1892,66 @@ int nodeLinkClass::alarm_compute_clear ( struct nodeLinkClass::node * node_ptr,
     return (PASS);
 }
 
+/*****************************************************************************
+ *
+ * Name       : alarm_mtcAlive_failure, alarm_mtcAlive_clear
+ *
+ * Purpose    : Generate a log and assert minor or clear alarm for mtcAlive
+ *              messaging failures.
+ *
+ * Assumptions: Degrade not supported for minor alarms.
+ *
+ * Limitations: Only pxeboot messaging is currently supported.
+ *              Need to introduce an network mtcAlive alarm array to track which
+ *              ones are active if/when it comes time to support alarming of
+ *              mtcAlive failures on other networks.
+ *
+ *****************************************************************************/
+int nodeLinkClass::alarm_mtcAlive_failure (  struct nodeLinkClass::node * node_ptr, int network )
+{
+    int rc = PASS ;
+    if ( network != PXEBOOT_INTERFACE )
+    {
+        slog ("%s mtcAlive alarm not supported for %s network",
+                  node_ptr->hostname.c_str(),
+                  get_iface_name_str(network));
+        rc = FAIL_INVALID_OPERATION ;
+    }
+    else if ( node_ptr->alarms[MTC_ALARM_ID__MTCALIVE] != FM_ALARM_SEVERITY_MINOR )
+    {
+        wlog ("%s minor %s mtcAlive messaging failure",
+                  node_ptr->hostname.c_str(),
+                  get_iface_name_str(network));
+
+        mtcAlarm_minor ( node_ptr->hostname, MTC_ALARM_ID__MTCALIVE );
+        node_ptr->alarms[MTC_ALARM_ID__MTCALIVE] = FM_ALARM_SEVERITY_MINOR ;
+    }
+    return (rc);
+}
+
+int nodeLinkClass::alarm_mtcAlive_clear (  struct nodeLinkClass::node * node_ptr, int network )
+{
+    int rc = PASS ;
+    if ( network != PXEBOOT_INTERFACE )
+    {
+        slog ("%s mtcAlive alarm not supported for %s network",
+                  node_ptr->hostname.c_str(),
+                  get_iface_name_str(network));
+        rc = FAIL_INVALID_OPERATION ;
+    }
+    else if ( node_ptr->alarms[MTC_ALARM_ID__MTCALIVE] != FM_ALARM_SEVERITY_CLEAR )
+    {
+        ilog ("%s minor %s mtcAlive messaging failure",
+                  node_ptr->hostname.c_str(),
+                  get_iface_name_str(network));
+
+        mtcAlarm_clear ( node_ptr->hostname, MTC_ALARM_ID__MTCALIVE );
+        node_ptr->alarms[MTC_ALARM_ID__MTCALIVE] = FM_ALARM_SEVERITY_CLEAR ;
+        node_ptr->mtcAlive_loss_count[network] = 0 ;
+    }
+    return (rc);
+}
+
 /** Host Operational State Change public member function */
 int nodeLinkClass::oper_subf_state_change ( string hostname, string newOperState )
 {
@@ -3086,6 +3152,7 @@ void nodeLinkClass::clear_service_readies ( struct nodeLinkClass::node * node_pt
             ilog ("%s clearing service ready events\n", node_ptr->hostname.c_str());
             node_ptr->hbsClient_ready = false ;
             node_ptr->pmond_ready     = false ;
+            node_ptr->mtcClient_ready = false ;
         }
     }
 }
@@ -3952,6 +4019,25 @@ int nodeLinkClass::set_clstr_hostaddr ( string & hostname, string & ip )
     return ( rc );
 }
 
+int nodeLinkClass::set_pxeboot_mtcAlive_support ( string hostname, bool state )
+{
+    int rc = FAIL_HOSTNAME_LOOKUP ;
+    nodeLinkClass::node* node_ptr = nodeLinkClass::getNode ( hostname );
+    if ( node_ptr != NULL )
+    {
+        if ( state != node_ptr->pxeboot_mtcAlive_supported )
+            mtcAliveStageChange (node_ptr, MTC_MTCALIVE__START);
+
+        dlog ("%s pxeboot mtcAlive %s supported",
+                  node_ptr->hostname.c_str(),
+                  state ? "is" : "is not");
+
+        node_ptr->pxeboot_mtcAlive_supported = state ;
+        rc = PASS ;
+    }
+    return ( rc );
+}
+
 string nodeLinkClass::get_hostname ( string hostaddr )
 {
     if (( hostaddr == LOOPBACK_IPV6 ) ||
@@ -4197,7 +4283,7 @@ void nodeLinkClass::set_mtcAlive ( struct nodeLinkClass::node * node_ptr, unsign
             }
             if ( state_change )
             {
-                ilog ("%s mtcAlive received from %s network with uptime:%d ; seq:%d",
+                ilog ("%s mtcAlive received from %s network with uptime:%d ; seq:%d ; state change",
                           node_ptr->hostname.c_str(),
                           get_iface_name_str(iface),
                           node_ptr->uptime,
@@ -4208,22 +4294,32 @@ void nodeLinkClass::set_mtcAlive ( struct nodeLinkClass::node * node_ptr, unsign
             {
                 if ( sequence < node_ptr->mtcAlive_sequence[iface]+1 )
                 {
-                    wlog ("%s mtcAlive received from %s network with uptime:%d ; out-of-sequence ; expect:%d detect:%d ; correcting",
-                              node_ptr->hostname.c_str(),
-                              get_iface_name_str(iface),
-                              node_ptr->uptime,
-                              node_ptr->mtcAlive_sequence[iface]+1,
-                              sequence);
+                    // Don't warn log for mtcClient restart cases.
+                    // ... indicated by a very low sequence number.
+                    if ( sequence > 2 )
+                    {
+                        wlog ("%s mtcAlive received from %s network with uptime:%d ; out-of-sequence ; expect:%d detect:%d ; correcting",
+                                  node_ptr->hostname.c_str(),
+                                  get_iface_name_str(iface),
+                                  node_ptr->uptime,
+                                  node_ptr->mtcAlive_sequence[iface]+1,
+                                  sequence);
+                    }
                 }
                 else
                 {
-                    wlog ("%s mtcAlive received from %s network with uptime:%d ; missed %d mtcalive msgs ; expect:%d detect:%d ; correcting",
-                              node_ptr->hostname.c_str(),
-                              get_iface_name_str(iface),
-                              node_ptr->uptime,
-                              sequence-(node_ptr->mtcAlive_sequence[iface]+1),
-                              node_ptr->mtcAlive_sequence[iface]+1,
-                              sequence);
+                    // Don't warn log for mtcAgent restart cases.
+                    // ... indicated by expecting 1 and detecting a large number.
+                    if ( node_ptr->mtcAlive_sequence[iface] > 0 )
+                    {
+                        wlog ("%s mtcAlive received from %s network with uptime:%d ; missed %d mtcAlive msgs ; expect:%d detect:%d ; correcting",
+                                  node_ptr->hostname.c_str(),
+                                  get_iface_name_str(iface),
+                                  node_ptr->uptime,
+                                  sequence-(node_ptr->mtcAlive_sequence[iface]+1),
+                                  node_ptr->mtcAlive_sequence[iface]+1,
+                                  sequence);
+                    }
                 }
             }
             else
@@ -5659,7 +5755,8 @@ void nodeLinkClass::manage_heartbeat_minor ( string hostname, iface_enum iface,
 /** Interface to declare that a key service on the
   * specified host is up, running and ready */
 int nodeLinkClass::declare_service_ready  ( string & hostname,
-                                            unsigned int service )
+                                            unsigned int service,
+                                            string feature_list )
 {
     nodeLinkClass::node * node_ptr = nodeLinkClass::getNode ( hostname );
     if ( node_ptr == NULL )
@@ -5667,6 +5764,58 @@ int nodeLinkClass::declare_service_ready  ( string & hostname,
         wlog ("%s Unknown Host\n", hostname.c_str());
         return FAIL_UNKNOWN_HOSTNAME ;
     }
+    else if ( service == MTC_SERVICE_MTCCLIENT )
+    {
+
+        if ( ! feature_list.empty() )
+        {
+            /* features is expected to be a list - ["feature 0", "feature 1", ..."] */
+            struct json_object *json_obj = json_tokener_parse(feature_list.data());
+            if ( json_obj != NULL )
+            {
+                /* how many featiures are present ? */
+                int features = json_object_array_length(json_obj);
+
+                dlog ("%s %s offers %d features", hostname.c_str(), MTC_SERVICE_MTCCLIENT_NAME, features);
+
+                for ( int f = 0 ; f < features ; f++ )
+                {
+                    /* get the first element at index 0 */
+                    struct json_object *feature_obj_ptr = json_object_array_get_idx(json_obj, f);
+
+                    /* convert each element to a string */
+                    string feature = json_object_get_string(feature_obj_ptr);
+                    dlog ("mtcClient feature %d: %s", f, feature.c_str());
+                    if ( feature == MTC_PXEBOOT_MTCALIVE )
+                    {
+                        dlog ("%s %s supports pxeboot mtcAlive", hostname.c_str(), MTC_SERVICE_MTCCLIENT_NAME);
+                        set_pxeboot_mtcAlive_support (hostname, true);
+                    }
+                }
+                /* free the json object */
+                json_object_put(json_obj);
+            }
+            else
+            {
+                dlog ("%s json object is NULL", hostname.c_str());
+            }
+        }
+        else
+        {
+            dlog ("%s feature list is empty", hostname.c_str());
+        }
+
+        if ( node_ptr->mtcClient_ready == false )
+        {
+            ilog ("%s %s ready %s", hostname.c_str(),
+                                    MTC_SERVICE_MTCCLIENT_NAME,
+                                    node_ptr->pxeboot_mtcAlive_supported ? "; with pxeboot mtcAlive support" : "");
+            node_ptr->mtcClient_ready = true ;
+        }
+        if ( node_ptr->pxeboot_mtcAlive_supported )
+            send_mtc_cmd ( node_ptr->hostname, MTC_REQ_MTCALIVE, PXEBOOT_INTERFACE );
+        return (PASS);
+    }
     else if ( service == MTC_SERVICE_PMOND )
     {
         node_ptr->pmond_ready = true ;
@@ -9580,7 +9729,7 @@ void nodeLinkClass::mem_log_mtcalive_pxeboot ( struct nodeLinkClass::node * node
                 this->pxeboot_network_provisioned ? 'Y' : 'N',
                 node_ptr->mtcAlive_pxeboot        ? 'Y' : 'N',
                 node_ptr->mtcAlive_timer.ring     ? 'Y' : 'N',
-                node_ptr->mtcAlive_sequence_miss  [PXEBOOT_INTERFACE],
+                node_ptr->mtcAlive_miss_count     [PXEBOOT_INTERFACE],
                 node_ptr->mtcAlive_sequence       [PXEBOOT_INTERFACE],
                 node_ptr->mtcAlive_sequence_save  [PXEBOOT_INTERFACE]);
 
@@ -9590,9 +9739,10 @@ void nodeLinkClass::mem_log_mtcalive_pxeboot ( struct nodeLinkClass::node * node
 void nodeLinkClass::mem_log_alarm1 ( struct nodeLinkClass::node * node_ptr )
 {
     char str[MAX_MEM_LOG_DATA] ;
-    snprintf (&str[0], MAX_MEM_LOG_DATA, "%s\tAlarm List:%s%s%s%s%s\n",
+    snprintf (&str[0], MAX_MEM_LOG_DATA, "%s\tAlarm List:%s%s%s%s%s%s\n",
                node_ptr->hostname.c_str(),
                node_ptr->alarms[MTC_ALARM_ID__LOCK    ] ? " Locked"   : " .",
+               node_ptr->alarms[MTC_ALARM_ID__MTCALIVE] ? " mtcAlive" : " .",
                node_ptr->alarms[MTC_ALARM_ID__CONFIG  ] ? " Config"   : " .",
                node_ptr->alarms[MTC_ALARM_ID__ENABLE  ] ? " Enable"   : " .",
                node_ptr->alarms[MTC_ALARM_ID__CH_COMP ] ? " Compute"  : " .",
diff --git a/mtce/src/common/nodeClass.h b/mtce/src/common/nodeClass.h
index 9536f00f..3f5a7825 100755
--- a/mtce/src/common/nodeClass.h
+++ b/mtce/src/common/nodeClass.h
@@ -335,9 +335,22 @@ private:
         /* tracks the sequence number of the last <iface> mtcAlive message */
         unsigned int mtcAlive_sequence     [MTCALIVE_INTERFACES_MAX] ;
         unsigned int mtcAlive_sequence_save[MTCALIVE_INTERFACES_MAX] ;
-        unsigned int mtcAlive_sequence_miss[MTCALIVE_INTERFACES_MAX] ;
+        unsigned int mtcAlive_miss_count   [MTCALIVE_INTERFACES_MAX] ;
         unsigned int mtcAlive_log_throttle [MTCALIVE_INTERFACES_MAX] ;
 
+        /* mtcAlive miss, loss, alarm and log throttle definitions */
+        #define PXEBOOT_MTCALIVE_MONITOR_RATE_SECS     (MTC_ALIVE_TIMER*2) // monitor every 10 seconds
+        #define PXEBOOT_MTCALIVE_LOSS_THRESHOLD        (6)  // 6 misses or 1 minute if back-2-back
+        #define PXEBOOT_MTCALIVE_LOSS_ALARM_THRESHOLD  (2)  // 2 losses before recovery is 2 minutes
+        #define PXEBOOT_MTCALIVE_NOT_SEEN_LOG_THROTTLE (60) // not seen log every 10 minutes
+        #define PXEBOOT_MTCALIVE_LOSS_LOG_THROTTLE     (60) // loss log every 10 minutes
+
+        /* used to debounce mtcAlive loss alarm */
+        unsigned int mtcAlive_loss_count   [MTCALIVE_INTERFACES_MAX] ;
+
+        /* indicates boolean support for pxeboot mtcAlive messaging */
+        bool pxeboot_mtcAlive_supported ;
+
         /* pxeboot mtcAlive monitor log throttles */
         int pxeboot_mtcAlive_not_seen_log_throttle ;
         int pxeboot_mtcAlive_loss_log_throttle ;
@@ -661,6 +674,9 @@ private:
         /** Host degraded due to loss of Process Monitor running flag */
         bool pmon_degraded ;
 
+        /* Maintenance Client Ready */
+        bool mtcClient_ready ;
+
         /** Process Monitor Ready flag and degrade list */
         bool pmond_ready ;
 
@@ -1139,6 +1155,9 @@ private:
     int alarm_compute_clear   ( struct nodeLinkClass::node * node_ptr, bool force );
     int alarm_compute_failure ( struct nodeLinkClass::node * node_ptr , EFmAlarmSeverityT sev );
 
+    int alarm_mtcAlive_clear  (  struct nodeLinkClass::node * node_ptr, int network );
+    int alarm_mtcAlive_failure(  struct nodeLinkClass::node * node_ptr, int network );
+
     void clear_subf_failed_bools ( struct nodeLinkClass::node * node_ptr );
     void clear_main_failed_bools ( struct nodeLinkClass::node * node_ptr );
     void clear_hostservices_ctls ( struct nodeLinkClass::node * node_ptr );
@@ -1496,6 +1515,9 @@ public:
     /* set the pxeboot network address for any hostname */
     int set_pxeboot_hostaddr ( string hostname, string ip );
 
+    /* set the state of this node's pxeboot mtcAlive support */
+    int set_pxeboot_mtcAlive_support ( string hostname, bool state );
+
     /** get hostname for any hostname */
     string get_hostname ( string hostaddr );
 
@@ -1732,6 +1754,13 @@ public:
      *  interface is on the 'lo' (localhost) interface. */
     bool pxeboot_network_provisioned ;
 
+    /** A boolean that is used to indicate whether this node supports
+     *  pxeboot mtcAlive messaging.
+     *  This is needed to support upgrades to nodes that don't support
+     *  this feature prior to their upgrade.
+     *  Assuming controllers are upgraded first.*/
+    bool pxeboot_mtcAlive_supported ;
+
     /** A debug bool hat allows cluster-host heartbeat failures to only
      *  cause host degrade rather than failure */
     bool clstr_degrade_only ;
@@ -1925,7 +1954,7 @@ public:
 
     /** Interface to declare that a key service on the
       * specified host is up, running and ready */
-    int declare_service_ready  ( string & hostname, unsigned int service );
+    int declare_service_ready  ( string & hostname, unsigned int service, string features="" );
 
     /** Process Monitor 'Clear' Event handler.
       *
diff --git a/mtce/src/maintenance/mtcAlarm.cpp b/mtce/src/maintenance/mtcAlarm.cpp
index be705d75..ce536cf1 100644
--- a/mtce/src/maintenance/mtcAlarm.cpp
+++ b/mtce/src/maintenance/mtcAlarm.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2017 Wind River Systems, Inc.
+ * Copyright (c) 2015-2017, 2024 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
@@ -64,6 +64,32 @@ void mtcAlarm_init ( void )
     snprintf( ptr->alarm.proposed_repair_action, FM_MAX_BUFFER_LENGTH,
               "Administratively unlock Host to bring it back in-service.");
 
+    /** pxeboot mtcAlive Alarm **************************************************/
+
+    ptr = &alarm_list[MTC_ALARM_ID__MTCALIVE];
+    memset  (&ptr->alarm, 0, (sizeof(SFmAlarmDataT)));
+    snprintf(&ptr->alarm.alarm_id[0], FM_MAX_BUFFER_LENGTH, "%s", LOCK_ALARM_ID);
+
+    ptr->name = "mtcAlive" ;
+    ptr->instc_prefix = "" ;
+
+    ptr->critl_reason =
+    ptr->major_reason =
+    ptr->minor_reason = "pxeboot network communication failure";
+    ptr->clear_reason = "pxeboot network communication recovered";
+
+    ptr->alarm.alarm_type         = FM_ALARM_COMM ;
+    ptr->alarm.probable_cause     = FM_ALARM_CAUSE_UNKNOWN;
+    ptr->alarm.inhibit_alarms     = FM_FALSE;
+    ptr->alarm.service_affecting  = FM_FALSE;
+    ptr->alarm.suppression        = FM_TRUE ;
+
+    ptr->alarm.severity           = FM_ALARM_SEVERITY_CLEAR ; /* Dynamic */
+    ptr->alarm.alarm_state        = FM_ALARM_STATE_CLEAR    ; /* Dynamic */
+
+    snprintf( ptr->alarm.proposed_repair_action, FM_MAX_BUFFER_LENGTH,
+              "Administratively Lock and Unlock host to recover. If problem persists, contact next level of support.");
+
     /** Enable Alarm ************************************************************/
 
     ptr = &alarm_list[MTC_ALARM_ID__ENABLE];
@@ -339,6 +365,7 @@ string _getIdentity ( mtc_alarm_id_enum id )
     switch ( id )
     {
         case MTC_ALARM_ID__LOCK:      return (LOCK_ALARM_ID);
+        case MTC_ALARM_ID__MTCALIVE:  return (MTCALIVE_ALARM_ID);
         case MTC_ALARM_ID__CONFIG:    return (CONFIG_ALARM_ID);
         case MTC_ALARM_ID__ENABLE:    return (ENABLE_ALARM_ID);
         case MTC_ALARM_ID__BM:        return (BM_ALARM_ID);
@@ -348,7 +375,7 @@ string _getIdentity ( mtc_alarm_id_enum id )
         case MTC_LOG_ID__COMMAND:     return (COMMAND_LOG_ID);
         case MTC_LOG_ID__STATECHANGE: return (STATECHANGE_LOG_ID);
         case MTC_LOG_ID__CONFIG:      return (CONFIG_LOG_ID);
-        default: return ("200.000");
+        default: return (SWERR_ALARM_ID);
     }
 }
 
diff --git a/mtce/src/maintenance/mtcAlarm.h b/mtce/src/maintenance/mtcAlarm.h
index e0ddf87e..abf63bd0 100644
--- a/mtce/src/maintenance/mtcAlarm.h
+++ b/mtce/src/maintenance/mtcAlarm.h
@@ -2,7 +2,7 @@
 #define __MTCALARM_H__
 
 /*
- * Copyright (c) 2015-2017 Wind River Systems, Inc.
+ * Copyright (c) 2015-2017, 2024 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
@@ -26,6 +26,7 @@ using namespace std;
 typedef enum
 {
     MTC_ALARM_ID__LOCK,
+    MTC_ALARM_ID__MTCALIVE,
     MTC_ALARM_ID__CONFIG,
     MTC_ALARM_ID__ENABLE,
     MTC_ALARM_ID__BM,
diff --git a/mtce/src/maintenance/mtcCompMsg.cpp b/mtce/src/maintenance/mtcCompMsg.cpp
index 3ec8b93b..c6f987dd 100755
--- a/mtce/src/maintenance/mtcCompMsg.cpp
+++ b/mtce/src/maintenance/mtcCompMsg.cpp
@@ -247,13 +247,20 @@ int mtc_service_command ( mtc_socket_type * sock_ptr, int interface )
         rc = PASS ;
         if ( msg.cmd == MTC_REQ_MTCALIVE )
         {
-            ilog ("mtcAlive request received from %s network", iface_name_ptr);
+            alog1 ("mtcAlive request received from %s network", iface_name_ptr);
             if ( interface == PXEBOOT_INTERFACE )
             {
                 alog2 ("pxeboot mtcAlive buffer: %s", &msg.buf[0]);
                 load_pxebootInfo_msg(msg);
+
+#ifdef WANT_FIT_TESTING
+                if ( ! daemon_want_fit ( FIT_CODE__FAIL_PXEBOOT_MTCALIVE ) )
+#endif
+                {
+                    send_mtcAlive_msg ( sock_ptr, ctrl_ptr->who_i_am, interface );
+                }
             }
-            return ( send_mtcAlive_msg ( sock_ptr, get_who_i_am(), interface ));
+            return (rc);
         }
         else if ( msg.cmd == MTC_MSG_INFO )
         {
@@ -749,6 +756,7 @@ int mtc_service_command ( mtc_socket_type * sock_ptr, int interface )
 int mtce_send_event ( mtc_socket_type * sock_ptr, unsigned int cmd , const char * mtce_name_ptr )
 {
     mtc_message_type event ;
+    ctrl_type *ctrl_ptr = get_ctrl_ptr();
 
     int rc    = PASS ;
     int bytes = 0    ;
@@ -772,13 +780,21 @@ int mtce_send_event ( mtc_socket_type * sock_ptr, unsigned int cmd , const char
         event_info.append(MTC_JSON_SERVICE);
         event_info.append("\":\"");
         event_info.append(MTC_SERVICE_MTCCLIENT_NAME );
-        event_info.append("\"}");
+
+        event_info.append("\",\"active_controller_pxeboot_address\":\"");
+        event_info.append(ctrl_ptr->pxeboot_addr_active_controller);
+
+        event_info.append("\",\"");
+        event_info.append(MTC_JSON_FEATURES);
+        event_info.append("\":[\"");
+        event_info.append(MTC_PXEBOOT_MTCALIVE);
+        event_info.append("\"]}");
 
         size_t len =  event_info.length()+1 ;
         snprintf ( &event.hdr[0], MSG_HEADER_SIZE, "%s", get_mtce_event_header());
         snprintf ( &event.buf[0], len, "%s", event_info.data());
         bytes = ((sizeof(mtc_message_type))-(BUF_SIZE-len));
-        ilog ("%s %s ready", get_hostname().c_str(), MTC_SERVICE_MTCCLIENT_NAME);
+        dlog ("%s %s ready", get_hostname().c_str(), MTC_SERVICE_MTCCLIENT_NAME);
     }
     else if (( cmd == MTC_EVENT_AVS_CLEAR    ) ||
              ( cmd == MTC_EVENT_AVS_MAJOR    ) ||
@@ -849,10 +865,37 @@ int mtce_send_event ( mtc_socket_type * sock_ptr, unsigned int cmd , const char
     }
     else
     {
-       elog ("cannot send to null or failed socket (%s)",
+       elog ("cannot send to null or failed management network socket (%s)",
               get_interface_name_str (MGMNT_INTERFACE) );
        rc = FAIL_SOCKET_SENDTO ;
     }
+
+    // Only the events sent on the pxeboot network are:
+    // - ready event
+    if (( cmd == MTC_EVENT_MONITOR_READY ) &&
+        ( sock_ptr->pxeboot_tx_socket > 0 ) &&
+        ( !ctrl_ptr->pxeboot_addr_active_controller.empty()))
+    {
+        int flags = 0 ; // no tx flags
+        struct sockaddr_in hostAddr;
+        memset(&hostAddr, 0, sizeof(hostAddr));
+        print_mtc_message ( ctrl_ptr->pxeboot_addr_active_controller.data(), MTC_CMD_TX, event, get_interface_name_str(PXEBOOT_INTERFACE), false);
+        hostAddr.sin_addr.s_addr = inet_addr(ctrl_ptr->pxeboot_addr_active_controller.data());
+        hostAddr.sin_family = AF_INET;
+        hostAddr.sin_port   = htons(sock_ptr->mtc_tx_pxeboot_port);
+
+        ssize_t bytes_sent = sendto(sock_ptr->pxeboot_tx_socket, &event.hdr[0], bytes, flags,
+                                    (const struct sockaddr*)&hostAddr, sizeof(hostAddr));
+        if (bytes_sent <= 0)
+        {
+            elog ("failed to send %s to %s:%d on %s network (rc:%ld) (%d:%m)",
+                    get_mtcNodeCommand_str(event.cmd),
+                    ctrl_ptr->pxeboot_addr_active_controller.c_str(),
+                    hostAddr.sin_port,
+                    get_interface_name_str(PXEBOOT_INTERFACE),
+                    bytes_sent, errno);
+        }
+    }
     return rc ;
 }
 
diff --git a/mtce/src/maintenance/mtcCtrlMsg.cpp b/mtce/src/maintenance/mtcCtrlMsg.cpp
index 96f8ef8b..353fd130 100755
--- a/mtce/src/maintenance/mtcCtrlMsg.cpp
+++ b/mtce/src/maintenance/mtcCtrlMsg.cpp
@@ -443,6 +443,7 @@ int mtc_service_inbox ( nodeLinkClass   *  obj_ptr,
         string service = "" ;
         string sensor  = "" ;
         string process = "" ;
+
         hostname = "unknown" ;
 
         int rc1 = FAIL ;
@@ -493,7 +494,17 @@ int mtc_service_inbox ( nodeLinkClass   *  obj_ptr,
                 }
                 else if ( service == MTC_SERVICE_MTCCLIENT_NAME )
                 {
-                    ilog ("%s %s ready", hostname.c_str(), MTC_SERVICE_MTCCLIENT_NAME);
+                    string features= "" ;
+                    if ( jsonUtil_get_key_val(&msg.buf[0], MTC_JSON_FEATURES, features ) == PASS )
+                    {
+                        dlog ("%s %s features: %s", hostname.c_str(), service.c_str(), features.c_str());
+                    }
+                    else
+                    {
+                        ilog ("%s %s not offering feature list ; node may have upgrade pending",
+                                  hostname.c_str(), MTC_SERVICE_MTCCLIENT_NAME);
+                    }
+                    obj_ptr->declare_service_ready ( hostname, MTC_SERVICE_MTCCLIENT, features );
 
                     /* if this ready event is from the mtcClient of a
                      * controller that has valid bmc access info then
@@ -697,7 +708,9 @@ int send_mtc_cmd ( string & hostname, int cmd , int interface, string json_dict
                  * controller's pxeboot ip addresses so it knows where to send. */
                 obj_ptr->pxebootInfo_loader();
                 data = "{\"pxebootInfo\":{" ;
-                data.append ("\"address\":\"");
+                data.append ("\"");
+                data.append (CONTROLLER);
+                data.append ("\":\"");
                 data.append (obj_ptr->my_pxeboot_ip);
                 data.append ("\",\"");
                 data.append (CONTROLLER_0);
diff --git a/mtce/src/maintenance/mtcNodeComp.cpp b/mtce/src/maintenance/mtcNodeComp.cpp
index 3c25d760..f5bad581 100644
--- a/mtce/src/maintenance/mtcNodeComp.cpp
+++ b/mtce/src/maintenance/mtcNodeComp.cpp
@@ -337,6 +337,7 @@ int daemon_configure ( void )
 
         rc  = PASS ;
     }
+    daemon_load_fit();
     return (rc);
 }
 
@@ -1267,6 +1268,9 @@ int daemon_init ( string iface, string nodetype_str )
     ctrl.clstr_iface_provisioned = false ;
     ctrl.pxeboot_iface_provisioned = false ;
     ctrl.peer_ctrlr_reset.sync = false ;
+    ctrl.pxeboot_addr_c0 = "" ;
+    ctrl.pxeboot_addr_c1 = "" ;
+    ctrl.pxeboot_addr_active_controller = "" ;
 
     /* convert node type to integer */
     ctrl.nodetype = get_host_function_mask ( nodetype_str ) ;
@@ -1295,9 +1299,12 @@ int daemon_init ( string iface, string nodetype_str )
         }
         else
         {
-            // Ready to do pxeboot messaging
+            ilog ("Mgmnt iface : %s", ctrl.mgmnt_iface.c_str());
+
+            // Not on LO, assume pxeboot provisioning starting with it being
+            // equal to the management interface, until otherwise updated due
+            // to bonding or vlan modes.
             ctrl.pxeboot_iface = ctrl.mgmnt_iface ;
-            ilog ("Pxeboot iface %s", ctrl.pxeboot_iface.c_str());
             ctrl.pxeboot_iface_provisioned = true ;
         }
     }
@@ -1437,7 +1444,9 @@ void daemon_service_run ( void )
                          ctrl.peer_ctrlr_reset.audit_period );
     }
 
+    /* Send the mtcClient ready event and clear the periodic event counter */
     mtce_send_event ( sock_ptr, MTC_EVENT_MONITOR_READY, NULL );
+    ctrl.ready_event_counter = 0 ;
 
     /* lets go select so that the sock does not go crazy */
     dlog ("%s running main loop with %d msecs socket timeout\n",
@@ -1646,7 +1655,7 @@ void daemon_service_run ( void )
                 }
             }
         }
-        if ( ctrl.timer.ring == true )
+        if ( mtcTimer_expired ( ctrl.timer ) )
         {
             bool socket_reinit = true ;
 
@@ -1745,7 +1754,13 @@ void daemon_service_run ( void )
                 string who_i_am = _self_identify ( ctrl.nodetype_str );
             }
             alog1 ("sending mtcAlive on all provisioned mtcAlive networks");
-            send_mtcAlive_msg ( sock_ptr, ctrl.who_i_am, PXEBOOT_INTERFACE );
+
+#ifdef WANT_FIT_TESTING
+            if ( ! daemon_want_fit ( FIT_CODE__FAIL_PXEBOOT_MTCALIVE ) )
+#endif
+            {
+                send_mtcAlive_msg ( sock_ptr, ctrl.who_i_am, PXEBOOT_INTERFACE );
+            }
             send_mtcAlive_msg ( sock_ptr, ctrl.who_i_am, MGMNT_INTERFACE );
             if (( ctrl.clstr_iface_provisioned == true ) &&
                 ( mtc_sock.mtc_client_clstr_rx_socket != NULL ) &&
@@ -1801,6 +1816,22 @@ void daemon_service_run ( void )
                     _close_amon_sock ();
                 }
             }
+
+            // Purpose: mtcClient ready event audit
+            //
+            // Send the ready event every minute just in case the first
+            // process startup event was missed by the mtcAgent or
+            // the mtcAgent was restarted.
+            //.
+            // Needed to ensure that pxeboot mtcAlive messaging monitoring
+            // gets started over a mtcagent process restart.
+            if ( ++ctrl.ready_event_counter >= (MTC_MINS_1/MTC_ALIVE_TIMER) )
+            {
+
+                dlog ("sending mtcClient ready event");
+                mtce_send_event ( sock_ptr, MTC_EVENT_MONITOR_READY, NULL );
+                ctrl.ready_event_counter = 0 ;
+            }
         }
 
         /* service controller specific audits */
@@ -2388,8 +2419,9 @@ void load_mtcInfo_msg ( mtc_message_type & msg )
  *              Address can be empty of an unprovisioned controller.
  *
  *              { "pxebootInfo":{
- *                   "controller-0":"169.254.202.2",
- *                   "controller-1":"169.254.202.3"
+ *                   "controller"   : "169.254.202.2"
+ *                   "controller-0" : "169.254.202.2",
+ *                   "controller-1" : "169.254.202.3"
  *                 }
  *              }
  *
@@ -2398,18 +2430,43 @@ void load_mtcInfo_msg ( mtc_message_type & msg )
  ***************************************************************************/
 void load_pxebootInfo_msg ( mtc_message_type & msg )
 {
-    struct json_object *_obj = json_tokener_parse( &msg.buf[0] );
-    if ( _obj )
+    struct json_object *json_obj = json_tokener_parse( &msg.buf[0] );
+    if ( json_obj )
     {
         const char dict_label [] = "pxebootInfo" ;
         struct json_object *info_obj = (struct json_object *)(NULL);
-        json_bool json_rc = json_object_object_get_ex( _obj,
+        json_bool json_rc = json_object_object_get_ex( json_obj,
                                             &dict_label[0],
                                             &info_obj );
 
         if ( ( json_rc == true ) && ( info_obj ) )
         {
+            jlog ("%s: %s ", &dict_label[0], json_object_get_string(info_obj));
             struct json_object *ctrl_obj = (struct json_object *)(NULL);
+            json_rc = json_object_object_get_ex( info_obj, CONTROLLER, &ctrl_obj );
+            if (( json_rc == true ) && ( ctrl_obj ))
+            {
+                string active_controller = json_object_get_string(ctrl_obj);
+                if ( ctrl.pxeboot_addr_active_controller != active_controller )
+                {
+                    string prefix = "controller pxeboot address" ;
+                    if ( ctrl.pxeboot_addr_active_controller.empty() )
+                    {
+                        ilog ("%s: %s",
+                               prefix.c_str(),
+                               active_controller.c_str());
+                    }
+                    else
+                    {
+                        ilog ("%s: %s ; was %s",
+                               prefix.c_str(),
+                               active_controller.c_str(),
+                               ctrl.pxeboot_addr_active_controller.c_str());
+                    }
+                    ctrl.pxeboot_addr_active_controller = active_controller ;
+                }
+            }
+            // now get the individual controller addresses
             string pxeboot_addr_cx[CONTROLLERS] = {CONTROLLER_0, CONTROLLER_1};
             for (int c = 0 ; c < CONTROLLERS ; c++)
             {
@@ -2423,8 +2480,7 @@ void load_pxebootInfo_msg ( mtc_message_type & msg )
                 // get the current pxeboot address for the in loop controller
                 cur_pxeboot_addr = (controller == CONTROLLER_0) ? ctrl.pxeboot_addr_c0 : ctrl.pxeboot_addr_c1;
 
-                json_bool json_rc =
-                json_object_object_get_ex( info_obj, controller.data(), &ctrl_obj );
+                json_rc = json_object_object_get_ex( info_obj, controller.data(), &ctrl_obj );
                 if (( json_rc == true ) && (ctrl_obj))
                 {
                     jlog ("controller-x obj data: %s", json_object_get_string(ctrl_obj));
@@ -2477,7 +2533,7 @@ void load_pxebootInfo_msg ( mtc_message_type & msg )
             elog("Failed to parse '%s' from mtcAlive request message: %s",
                   &dict_label[0], &msg.buf[0]);
         }
-        json_object_put(_obj);
+        json_object_put(json_obj);
     }
     else
     {
diff --git a/mtce/src/maintenance/mtcNodeComp.h b/mtce/src/maintenance/mtcNodeComp.h
index a61a9317..01b8901d 100644
--- a/mtce/src/maintenance/mtcNodeComp.h
+++ b/mtce/src/maintenance/mtcNodeComp.h
@@ -102,6 +102,7 @@ typedef struct
     string       pxeboot_addr    ;
     string       pxeboot_addr_c0 ;
     string       pxeboot_addr_c1 ;
+    string       pxeboot_addr_active_controller ;
 
     // Assume address is learned to start even though it's likely not.
     // This enabled the first not learned log followed by a learned
@@ -147,6 +148,10 @@ typedef struct
     string mtcAgent_ip ;
 
     peer_ctrlr_reset_type peer_ctrlr_reset;
+
+    /* throttles sending the periodic mtcClient ready event. */
+    int ready_event_counter ;
+
 } ctrl_type ;
 
 ctrl_type * get_ctrl_ptr ( void );
diff --git a/mtce/src/maintenance/mtcNodeFsm.cpp b/mtce/src/maintenance/mtcNodeFsm.cpp
index df9a8d54..74fc1a0d 100755
--- a/mtce/src/maintenance/mtcNodeFsm.cpp
+++ b/mtce/src/maintenance/mtcNodeFsm.cpp
@@ -90,14 +90,15 @@ int nodeLinkClass::fsm ( struct nodeLinkClass::node * node_ptr )
      *   with mtcAlive debouncing
      */
     nodeLinkClass::online_handler ( node_ptr );
-
-    /*
-     * Always run the mtcAlive handler.
-     *
+    /* pxeboot_mtcAlive_monitor
      * - monitor host's mtcAlive messaging
      * - manage  host's mtcAlive missing alarm
-     */
-    nodeLinkClass::pxeboot_mtcAlive_monitor ( node_ptr );
+     *
+     * Don't monitor pxeboot mtcAlive messaging while the pxeboot network is
+     * not provisioned or that node has not yet reported that it supports
+     * pxeboot mtcAlive messaging */
+    if ( this->pxeboot_network_provisioned && node_ptr->pxeboot_mtcAlive_supported )
+        nodeLinkClass::pxeboot_mtcAlive_monitor ( node_ptr );
 
     if ( node_ptr->adminAction == MTC_ADMIN_ACTION__DELETE )
     {
@@ -106,7 +107,6 @@ int nodeLinkClass::fsm ( struct nodeLinkClass::node * node_ptr )
         return (PASS);
     }
 
-
     /* Run the config FSM if the configAction bool is set.
      * We keep this as a separate action unto itself so that
      * mtce can continue to service all other actions for the
diff --git a/mtce/src/maintenance/mtcNodeHdlrs.cpp b/mtce/src/maintenance/mtcNodeHdlrs.cpp
index 465c3750..7084dbab 100755
--- a/mtce/src/maintenance/mtcNodeHdlrs.cpp
+++ b/mtce/src/maintenance/mtcNodeHdlrs.cpp
@@ -3433,15 +3433,20 @@ int nodeLinkClass::offline_handler ( struct nodeLinkClass::node * node_ptr )
                     plog ("%s offline (external)\n", node_ptr->hostname.c_str());
                     node_ptr->offlineStage = MTC_OFFLINE__IDLE ;
                 }
-                else if ( !node_ptr->mtcAlive_mgmnt && !node_ptr->mtcAlive_clstr )
+                else if ( !node_ptr->mtcAlive_mgmnt && !node_ptr->mtcAlive_clstr && !node_ptr->mtcAlive_pxeboot )
                 {
                     if ( ++node_ptr->offline_search_count > offline_threshold )
                     {
                         node_ptr->mtcAlive_online = false ;
+                        node_ptr->mtcClient_ready = false ;
 
-                        // Clear all the mtcAlive_sequence numbers
+
+                        // Clear all the mtcAlive counts and sequence numbers
+                        node_ptr->mtcAlive_mgmnt_count = 0 ;
+                        node_ptr->mtcAlive_clstr_count = 0 ;
+                        node_ptr->mtcAlive_pxeboot_count = 0 ;
                         for (int i = 0 ; i < MTCALIVE_INTERFACES_MAX ; i++)
-                         node_ptr->mtcAlive_sequence[i] = 0;
+                            node_ptr->mtcAlive_sequence[i] = 0;
 
                         plog ("%s going offline ; (threshold (%d msec * %d)\n",
                                   node_ptr->hostname.c_str(),
@@ -3485,13 +3490,15 @@ int nodeLinkClass::offline_handler ( struct nodeLinkClass::node * node_ptr )
                     **/
 
                     node_ptr->mtcAlive_online = true ;
-                    ilog ("%s still seeing mtcAlive (%d) (Mgmt:%c:%d Clstr:%c:%d) ; restart offline_search_count=%d of %d\n",
+                    ilog ("%s still seeing mtcAlive (%d) (Mgmt:%c:%d Clstr:%c:%d Pxeboot:%c:%d) ; restart offline_search_count=%d of %d\n",
                               node_ptr->hostname.c_str(),
                               node_ptr->mtcAlive_count,
                               node_ptr->mtcAlive_mgmnt ? 'Y' : 'n',
                               node_ptr->mtcAlive_mgmnt_count,
                               node_ptr->mtcAlive_clstr ? 'Y' : 'n',
                               node_ptr->mtcAlive_clstr_count,
+                              node_ptr->mtcAlive_pxeboot ? 'Y' : 'n',
+                              node_ptr->mtcAlive_pxeboot_count,
                               node_ptr->offline_search_count,
                               offline_threshold );
                     node_ptr->offline_search_count = 0 ; /* reset the search count */
@@ -6261,6 +6268,8 @@ int nodeLinkClass::add_handler ( struct nodeLinkClass::node * node_ptr )
                 mtcAlarm_state ( node_ptr->hostname, MTC_ALARM_ID__ENABLE);
             EFmAlarmSeverityT config_alarm_severity =
                 mtcAlarm_state ( node_ptr->hostname, MTC_ALARM_ID__CONFIG);
+            EFmAlarmSeverityT mtcAlive_alarm_severity =
+                mtcAlarm_state ( node_ptr->hostname, MTC_ALARM_ID__MTCALIVE);
 
             /* Clear generic enable alarm over process restart.
              * Will get reasserted if the cause condition still exists */
@@ -6284,6 +6293,21 @@ int nodeLinkClass::add_handler ( struct nodeLinkClass::node * node_ptr )
                           alarmUtil_getSev_str(config_alarm_severity).c_str());
             }
 
+            /* The mtcAlive alarm is maintained if it exists.
+             * The pxeboot_mtcAlive_monitor will clear the alarm
+             * if it exists and the pxeboot mtcAlive messaging works. */
+            if ( mtcAlive_alarm_severity != FM_ALARM_SEVERITY_CLEAR )
+            {
+                node_ptr->alarms[MTC_ALARM_ID__MTCALIVE] = mtcAlive_alarm_severity ;
+                ilog ("%s found mtcAlive alarm ; loaded %s",
+                          node_ptr->hostname.c_str(),
+                          alarmUtil_getSev_str(mtcAlive_alarm_severity).c_str());
+
+                // Load up the miss and loss counts used for recovery
+                node_ptr->mtcAlive_loss_count[PXEBOOT_INTERFACE] = PXEBOOT_MTCALIVE_LOSS_ALARM_THRESHOLD ;
+                node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE] = PXEBOOT_MTCALIVE_LOSS_THRESHOLD ;
+            }
+
             if ( is_controller(node_ptr) )
             {
                 this->controllers++ ;
@@ -7571,29 +7595,46 @@ int nodeLinkClass::oos_test_handler ( struct nodeLinkClass::node * node_ptr )
 // Returns    : PASS
 //
 ///////////////////////////////////////////////////////////////////////////////
-#define PXEBOOT_MTCALIVE_MONITOR_RATE_SECS     (10)
-#define PXEBOOT_MTCALIVE_LOSS_THRESHOLD        (6)
-#define PXEBOOT_MTCALIVE_NOT_SEEN_LOG_THROTTLE (6)
-#define PXEBOOT_MTCALIVE_LOSS_LOG_THROTTLE     (6)
 int nodeLinkClass::pxeboot_mtcAlive_monitor ( struct nodeLinkClass::node * node_ptr )
 {
-    // ERIK: TODO: Comment out once verified
     flog ("%s pxeboot mtcAlive fsm stage: %s",
            node_ptr->hostname.c_str(),
            get_mtcAliveStages_str(node_ptr->mtcAliveStage).c_str());
 
-    if ( !this->pxeboot_network_provisioned ) return PASS ;
+
+    // Don't monitor pxeboot mtcAlive messaging while the node is
+    // locked or in the following administrative action states.
+    if (( node_ptr->adminState == MTC_ADMIN_STATE__LOCKED ) ||
+        ( node_ptr->adminAction == MTC_ADMIN_ACTION__UNLOCK ) ||
+        ( node_ptr->adminAction == MTC_ADMIN_ACTION__ENABLE ) ||
+        ( node_ptr->adminAction == MTC_ADMIN_ACTION__RECOVER ) ||
+        ( node_ptr->adminAction == MTC_ADMIN_ACTION__POWERCYCLE ))
+    {
+        // Clear the alarm if the node is locked
+        if (( node_ptr->adminState == MTC_ADMIN_STATE__LOCKED ) &&
+            ( node_ptr->alarms[MTC_ALARM_ID__MTCALIVE] != FM_ALARM_SEVERITY_CLEAR ))
+            alarm_mtcAlive_clear (node_ptr, PXEBOOT_INTERFACE);
+        // Switch to START if not already there
+        if ( node_ptr->mtcAliveStage != MTC_MTCALIVE__START )
+            mtcAliveStageChange (node_ptr, MTC_MTCALIVE__START);
+        return PASS ;
+    }
 
     switch (node_ptr->mtcAliveStage)
     {
+        // Starts from scratch. Clears timer and counts but not alarm.
         case MTC_MTCALIVE__START:
         {
             alog2 ("%s mtcAlive start", node_ptr->hostname.c_str());
-            mtcTimer_reset ( node_ptr->mtcAlive_timer );
+            if ( ! mtcTimer_expired (node_ptr->mtcAlive_timer) )
+                mtcTimer_reset (node_ptr->mtcAlive_timer);
             node_ptr->mtcAlive_sequence[PXEBOOT_INTERFACE] = 0 ;
+            node_ptr->mtcAlive_sequence_save[PXEBOOT_INTERFACE] = 0 ;
             mtcAliveStageChange (node_ptr, MTC_MTCALIVE__SEND);
-            break ;
+            return PASS ;
         }
+        // Reloads the controller's pxeboot info and sends it with a mtcAlive request
+        // telling the remote node to send send mtcAlive to the active controller.
         case MTC_MTCALIVE__SEND:
         {
             /* pxeboot info refresh audit */
@@ -7601,25 +7642,31 @@ int nodeLinkClass::pxeboot_mtcAlive_monitor ( struct nodeLinkClass::node * node_
                 pxebootInfo_loader ();
             alog2 ("%s mtcAlive send", node_ptr->hostname.c_str());
             send_mtc_cmd ( node_ptr->hostname, MTC_REQ_MTCALIVE, PXEBOOT_INTERFACE );
-            node_ptr->mtcAlive_sequence_save[PXEBOOT_INTERFACE] = 0 ;
-            node_ptr->mtcAlive_sequence_miss[PXEBOOT_INTERFACE] = 0 ;
             mtcAliveStageChange (node_ptr, MTC_MTCALIVE__MONITOR);
-            break ;
+            return PASS ;
         }
+        // Start the Wait timer 2x longer than the expected mtcAlive cadence
         case MTC_MTCALIVE__MONITOR:
         {
             alog2 ("%s mtcAlive monitor", node_ptr->hostname.c_str());
             mtcTimer_start ( node_ptr->mtcAlive_timer, mtcTimer_handler,
                              PXEBOOT_MTCALIVE_MONITOR_RATE_SECS );
             mtcAliveStageChange (node_ptr, MTC_MTCALIVE__WAIT);
-            break ;
+            return PASS ;
         }
+        // Wait for the timer to expire
         case MTC_MTCALIVE__WAIT:
         {
             if ( mtcTimer_expired ( node_ptr->mtcAlive_timer ) )
                 mtcAliveStageChange (node_ptr, MTC_MTCALIVE__CHECK);
-            break ;
+            return PASS ;
         }
+        // Check the mtcAlive sequence numbers and handle each possible case
+        // success         - mtcAlive sequence number is greater than the last one - may clear alarm
+        // out-of-sequence - mtcAlive sequence number is less than the last one    - may assert alarm
+        // miss            - mtcAlive sequence number is equal to the last one     - count misses
+        // loss            - mtcAlive messaging miss count exceeded threshold      - assert alarm
+        // not seen        - waiting for first mtcAlive following reboot           - request mtcAlive
         case MTC_MTCALIVE__CHECK:
         {
             if ( node_ptr->mtcAlive_sequence[PXEBOOT_INTERFACE] > node_ptr->mtcAlive_sequence_save[PXEBOOT_INTERFACE] )
@@ -7632,70 +7679,132 @@ int nodeLinkClass::pxeboot_mtcAlive_monitor ( struct nodeLinkClass::node * node_
                            node_ptr->mtcAlive_sequence_save[PXEBOOT_INTERFACE]);
 
                 // Now that we received a message we can dec the missed count
-                if ( node_ptr->mtcAlive_sequence_miss[PXEBOOT_INTERFACE] )
-                    node_ptr->mtcAlive_sequence_miss[PXEBOOT_INTERFACE]-- ;
-                node_ptr->pxeboot_mtcAlive_not_seen_log_throttle = 0 ;
-                node_ptr->pxeboot_mtcAlive_loss_log_throttle = 0 ;
+                // and clear the alarm if it exists
+                if ( node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE] )
+                {
+                    // Set miss count to max if we are have reached at least one loss but no alarm yet
+                    if (( node_ptr->alarms[MTC_ALARM_ID__MTCALIVE] == FM_ALARM_SEVERITY_CLEAR ) &&
+                        ( node_ptr->mtcAlive_loss_count[PXEBOOT_INTERFACE] ))
+                    {
+                        node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE] = PXEBOOT_MTCALIVE_LOSS_THRESHOLD ;
+                        node_ptr->mtcAlive_loss_count[PXEBOOT_INTERFACE] = 0 ;
+                    }
+
+                    ilog ("%s pxeboot mtcAlive miss count %d ; decrement %s; recovery",
+                              node_ptr->hostname.c_str(),
+                              node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE],
+                              node_ptr->alarms[MTC_ALARM_ID__MTCALIVE] ? "; alarm clear when 0 " : "");
+                    node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE]-- ;
+                }
+                else
+                {
+                    // Clear alarm and start with a clean loss slate. miss's is already zero
+                    node_ptr->mtcAlive_loss_count[PXEBOOT_INTERFACE] = 0 ;
+                    alarm_mtcAlive_clear ( node_ptr, PXEBOOT_INTERFACE );
+                }
+
+                // Clear the log throttles now that we have received a message
+                if ( node_ptr->pxeboot_mtcAlive_not_seen_log_throttle || node_ptr->pxeboot_mtcAlive_loss_log_throttle )
+                {
+                    node_ptr->pxeboot_mtcAlive_not_seen_log_throttle = 0 ;
+                    node_ptr->pxeboot_mtcAlive_loss_log_throttle = 0 ;
+                }
+
                 mtcAliveStageChange (node_ptr, MTC_MTCALIVE__MONITOR);
             }
             else if ( node_ptr->mtcAlive_sequence[PXEBOOT_INTERFACE] < node_ptr->mtcAlive_sequence_save[PXEBOOT_INTERFACE] )
             {
-                // unexpected case
-                wlog ("%s mtcAlive out-of-sequence ; this:%d  last:%d",
+                // mtcClient restart case
+                if ( ++node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE] < PXEBOOT_MTCALIVE_LOSS_THRESHOLD )
+                {
+                    // The mtcClient on this host may have been restarted
+                    mtcAliveStageChange (node_ptr, MTC_MTCALIVE__SEND);
+                }
+                else
+                    mtcAliveStageChange (node_ptr, MTC_MTCALIVE__FAIL);
+
+                wlog ("%s pxeboot mtcAlive miss count %d ; loss count %d ; out-of-sequence ; this:%d  last:%d",
                           node_ptr->hostname.c_str(),
+                          node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE],
+                          node_ptr->mtcAlive_loss_count[PXEBOOT_INTERFACE],
                           node_ptr->mtcAlive_sequence[PXEBOOT_INTERFACE],
                           node_ptr->mtcAlive_sequence_save[PXEBOOT_INTERFACE]);
-                node_ptr->mtcAlive_sequence_miss[PXEBOOT_INTERFACE]++ ;
-                mtcAliveStageChange (node_ptr, MTC_MTCALIVE__START);
             }
-            else if ( ++node_ptr->mtcAlive_sequence_miss[PXEBOOT_INTERFACE] < PXEBOOT_MTCALIVE_LOSS_THRESHOLD )
+            else if ( ++node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE] < PXEBOOT_MTCALIVE_LOSS_THRESHOLD )
             {
                 // Missing pxeboot mtcAlive
-                alog ("%s pxeboot mtcAlive miss count %d ; sending request",
+                wlog ("%s pxeboot mtcAlive miss count %d ; loss count %d ; sending request",
                           node_ptr->hostname.c_str(),
-                          node_ptr->mtcAlive_sequence_miss[PXEBOOT_INTERFACE]);
-                send_mtc_cmd ( node_ptr->hostname, MTC_REQ_MTCALIVE, PXEBOOT_INTERFACE );
-                mtcAliveStageChange (node_ptr, MTC_MTCALIVE__MONITOR);
-            }
-            else if ( node_ptr->mtcAlive_pxeboot == true )
-            {
-                wlog_throttled (node_ptr->pxeboot_mtcAlive_loss_log_throttle,
-                                PXEBOOT_MTCALIVE_LOSS_LOG_THROTTLE,
-                                "%s pxeboot mtcAlive loss ; missed: %d ; last: count:%d seq: %d ; sending request",
-                                node_ptr->hostname.c_str(),
-                                node_ptr->mtcAlive_sequence_miss[PXEBOOT_INTERFACE],
-                                node_ptr->mtcAlive_pxeboot_count,
-                                node_ptr->mtcAlive_sequence_save[PXEBOOT_INTERFACE]);
+                          node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE],
+                          node_ptr->mtcAlive_loss_count[PXEBOOT_INTERFACE]);
+                // The mtcClient on this host may have been restarted
                 mtcAliveStageChange (node_ptr, MTC_MTCALIVE__SEND);
             }
             else
             {
-                ilog_throttled (node_ptr->pxeboot_mtcAlive_not_seen_log_throttle,
-                                PXEBOOT_MTCALIVE_NOT_SEEN_LOG_THROTTLE,
-                                "%s pxeboot mtcAlive not seen yet ; sending request",
-                                node_ptr->hostname.c_str());
-                mtcAliveStageChange (node_ptr, MTC_MTCALIVE__SEND);
+                if ( node_ptr->mtcAlive_pxeboot == true )
+                {
+                    // If we get there its a loss
+                    wlog_throttled (node_ptr->pxeboot_mtcAlive_loss_log_throttle,
+                                    PXEBOOT_MTCALIVE_LOSS_LOG_THROTTLE,
+                                    "%s pxeboot mtcAlive lost ; missed: %d ; last: count:%d seq: %d ; sending request",
+                                    node_ptr->hostname.c_str(),
+                                    node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE],
+                                    node_ptr->mtcAlive_pxeboot_count,
+                                    node_ptr->mtcAlive_sequence_save[PXEBOOT_INTERFACE]);
+                }
+                else
+                {
+                    // Otherwise still searching beyond threshold for the first mtcAlive after reboot or graceful recovery
+                    ilog_throttled (node_ptr->pxeboot_mtcAlive_not_seen_log_throttle,
+                                    PXEBOOT_MTCALIVE_NOT_SEEN_LOG_THROTTLE,
+                                    "%s pxeboot mtcAlive not seen yet ; sending request",
+                                    node_ptr->hostname.c_str());
+                }
+                mtcAliveStageChange (node_ptr, MTC_MTCALIVE__FAIL);
             }
+
+            // Prevent the miss count from being larger than the loss, and therfore the alarm clear recovery, threshold.
+            if (node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE] > PXEBOOT_MTCALIVE_LOSS_THRESHOLD)
+                node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE] = PXEBOOT_MTCALIVE_LOSS_THRESHOLD;
+
             node_ptr->mtcAlive_sequence_save[PXEBOOT_INTERFACE] = node_ptr->mtcAlive_sequence[PXEBOOT_INTERFACE] ;
-
-            // TODO (emacdona): Need to handle loss case that manages raising the alarm
-            //                  Transition to MTC_MTCALIVE__FAIL
-
             break ;
         }
         case MTC_MTCALIVE__FAIL:
-        {
-            wlog ("%s mtcAlive fail", node_ptr->hostname.c_str());
-            mtcAliveStageChange (node_ptr, MTC_MTCALIVE__START);
-            break ;
-        }
         default:
         {
-            slog ("%s mtcAlive fsm default", node_ptr->hostname.c_str());
+            alog2 ("%s mtcAlive fail", node_ptr->hostname.c_str());
+            if ( node_ptr->alarms[MTC_ALARM_ID__MTCALIVE] == FM_ALARM_SEVERITY_CLEAR )
+            {
+                if ( ++node_ptr->mtcAlive_loss_count[PXEBOOT_INTERFACE] < PXEBOOT_MTCALIVE_LOSS_ALARM_THRESHOLD )
+                {
+                    wlog ("%s pxeboot mtcAlive lost ; %d more loss before alarm assertion",
+                              node_ptr->hostname.c_str(),
+                              PXEBOOT_MTCALIVE_LOSS_ALARM_THRESHOLD - node_ptr->mtcAlive_loss_count[PXEBOOT_INTERFACE] );
+
+                    // Start the misses counter over again after each loss debounce
+                    node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE] = 0 ;
+                }
+                else
+                {
+                    ilog ("%s pxeboot mtcAlive alarm assert (%d)",
+                              node_ptr->hostname.c_str(),
+                              node_ptr->mtcAlive_loss_count[PXEBOOT_INTERFACE]);
+                    alarm_mtcAlive_failure ( node_ptr, PXEBOOT_INTERFACE );
+                }
+            }
             mtcAliveStageChange (node_ptr, MTC_MTCALIVE__START);
             break ;
         }
     }
+    if ( node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE] || node_ptr->mtcAlive_loss_count[PXEBOOT_INTERFACE] )
+    {
+        alog2 ("%s pxeboot mtcAlive: Miss: %d of %d  ,  Loss: %d of %d",
+                  node_ptr->hostname.c_str(),
+                  node_ptr->mtcAlive_miss_count[PXEBOOT_INTERFACE], PXEBOOT_MTCALIVE_LOSS_THRESHOLD,
+                  node_ptr->mtcAlive_loss_count[PXEBOOT_INTERFACE], PXEBOOT_MTCALIVE_LOSS_ALARM_THRESHOLD);
+    }
     return (PASS);
 }