diff --git a/wireless/ieee802154/Kconfig b/wireless/ieee802154/Kconfig
index 2b0da5a8161..a18adb17b4e 100644
--- a/wireless/ieee802154/Kconfig
+++ b/wireless/ieee802154/Kconfig
@@ -49,12 +49,6 @@ config IEEE802154_PRIMITIVE_IRQRESERVE
 		because there are no interrupt level allocations performed by the
 		current IEEE 802.15.4 MAC code.
 
-config IEEE802154_DEFAULT_EADDR
-	hex "IEEE 802.15.4 Default Extended Address"
-	default 0x00fade00deadbeef
-	---help---
-		Set the default extended address to be used by MAC networks on init
-
 config IEEE802154_MAC
 	bool "Software MAC layer"
 	default n
diff --git a/wireless/ieee802154/mac802154.c b/wireless/ieee802154/mac802154.c
index e781a22f005..a04fd4ccf54 100644
--- a/wireless/ieee802154/mac802154.c
+++ b/wireless/ieee802154/mac802154.c
@@ -2132,8 +2132,6 @@ MACHANDLE mac802154_create(FAR struct ieee802154_radio_s *radiodev)
 {
   FAR struct ieee802154_privmac_s *mac;
   FAR struct ieee802154_radiocb_s *radiocb;
-  uint8_t eaddr[IEEE802154_EADDRSIZE];
-  int i;
 
   /* Allocate object */
 
@@ -2180,14 +2178,5 @@ MACHANDLE mac802154_create(FAR struct ieee802154_radio_s *radiodev)
 
   mac802154_req_reset((MACHANDLE)mac, true);
 
-  /* Set the default extended address */
-
-  for (i = 0; i < IEEE802154_EADDRSIZE; i++)
-    {
-      eaddr[i] = (CONFIG_IEEE802154_DEFAULT_EADDR >> (8 * i)) & 0xFF;
-    }
-
-  mac802154_seteaddr(mac, eaddr);
-
   return (MACHANDLE)mac;
 }
diff --git a/wireless/ieee802154/mac802154_data.c b/wireless/ieee802154/mac802154_data.c
index ec40509e205..33cf0152b58 100644
--- a/wireless/ieee802154/mac802154_data.c
+++ b/wireless/ieee802154/mac802154_data.c
@@ -136,8 +136,15 @@ int mac802154_req_data(MACHANDLE mac,
         }
       else if (meta->destaddr.mode == IEEE802154_ADDRMODE_EXTENDED)
         {
-          IEEE802154_EADDRCOPY(&frame->io_data[mhr_len], meta->destaddr.eaddr);
-          mhr_len += IEEE802154_EADDRSIZE;
+          /* The IEEE 802.15.4 Standard is confusing with regards to byte-order
+           * for * extended address. More research discovers that the extended
+           * address should be sent in reverse-canonical form.
+           */
+
+          for (int index = IEEE802154_EADDRSIZE - 1; index >= 0; index--)
+            {
+              frame->io_data[mhr_len++] = meta->destaddr.eaddr[index];
+            }
         }
     }
 
@@ -195,8 +202,15 @@ int mac802154_req_data(MACHANDLE mac,
         }
       else if (meta->srcmode == IEEE802154_ADDRMODE_EXTENDED)
         {
-          IEEE802154_EADDRCOPY(&frame->io_data[mhr_len], priv->addr.eaddr);
-          mhr_len += IEEE802154_EADDRSIZE;
+          /* The IEEE 802.15.4 Standard is confusing with regards to byte-order
+           * for * extended address. More research discovers that the extended
+           * address should be sent in reverse-canonical form.
+           */
+
+          for (int index = IEEE802154_EADDRSIZE - 1; index >= 0; index--)
+            {
+              frame->io_data[mhr_len++] = priv->addr.eaddr[index];
+            }
         }
     }
   else
diff --git a/wireless/ieee802154/mac802154_getset.c b/wireless/ieee802154/mac802154_getset.c
index a8d4874c401..6222ddbf589 100644
--- a/wireless/ieee802154/mac802154_getset.c
+++ b/wireless/ieee802154/mac802154_getset.c
@@ -193,7 +193,9 @@ int mac802154_req_set(MACHANDLE mac, enum ieee802154_attr_e attr,
         break;
       case IEEE802154_ATTR_MAC_EADDR:
         {
-          mac802154_seteaddr(priv, attrval->mac.eaddr);
+          /* macExtendedAddress is a read-only attribute */
+
+          ret = IEEE802154_STATUS_DENIED;
         }
         break;
       case IEEE802154_ATTR_MAC_COORD_SADDR:
diff --git a/wireless/ieee802154/mac802154_internal.h b/wireless/ieee802154/mac802154_internal.h
index dcdb62776ce..d2b2ecf7068 100644
--- a/wireless/ieee802154/mac802154_internal.h
+++ b/wireless/ieee802154/mac802154_internal.h
@@ -365,11 +365,18 @@ void mac802154_notify(FAR struct ieee802154_privmac_s *priv,
     } \
   while(0)
 
+/* The IEEE 802.15.4 Standard is confusing with regards to byte-order for
+ * extended address. More research discovers that the extended address should
+ * be sent in reverse-canonical form.
+ */
+
 #define mac802154_puteaddr(iob, eaddr) \
   do \
     { \
-      IEEE802154_EADDRCOPY(&iob->io_data[iob->io_len], eaddr); \
-      iob->io_len += IEEE802154_EADDRSIZE; \
+      for (int index = IEEE802154_EADDRSIZE - 1; index >= 0; index--) \
+        { \
+          iob->io_data[iob->io_len++] = eaddr[index]; \
+        } \
     } \
   while(0)
 
@@ -389,11 +396,18 @@ void mac802154_notify(FAR struct ieee802154_privmac_s *priv,
     } \
   while(0)
 
+/* The IEEE 802.15.4 Standard is confusing with regards to byte-order for
+ * extended address. More research discovers that the extended address should
+ * be sent in reverse-canonical form.
+ */
+
 #define mac802154_takeeaddr(iob, eaddr) \
   do \
     { \
-      IEEE802154_EADDRCOPY(eaddr, &iob->io_data[iob->io_offset]); \
-      iob->io_offset += IEEE802154_EADDRSIZE; \
+      for (int index = IEEE802154_EADDRSIZE - 1; index >= 0; index--) \
+        { \
+          eaddr[index] = iob->io_data[iob->io_offset++]; \
+        } \
     } \
   while(0)
 
@@ -735,14 +749,6 @@ static inline void mac802154_setsaddr(FAR struct ieee802154_privmac_s *priv,
                         (FAR const union ieee802154_attr_u *)saddr);
 }
 
-static inline void mac802154_seteaddr(FAR struct ieee802154_privmac_s *priv,
-                                      const uint8_t *eaddr)
-{
-  IEEE802154_EADDRCOPY(priv->addr.eaddr, eaddr);
-  priv->radio->setattr(priv->radio, IEEE802154_ATTR_MAC_EADDR,
-                        (FAR const union ieee802154_attr_u *)eaddr);
-}
-
 static inline void mac802154_setcoordsaddr(FAR struct ieee802154_privmac_s *priv,
                                           const uint8_t *saddr)
 {
diff --git a/wireless/ieee802154/mac802154_reset.c b/wireless/ieee802154/mac802154_reset.c
index f48c6bfe986..7e049b2d9c8 100644
--- a/wireless/ieee802154/mac802154_reset.c
+++ b/wireless/ieee802154/mac802154_reset.c
@@ -116,13 +116,11 @@ int mac802154_req_reset(MACHANDLE mac, bool resetattr)
       priv->trans_persisttime = 0x01F4;
 
       /* Reset the short address and PAN ID. The extended address does not
-       * get reset but must be set at the radio layer again. The only time the
-       * MAC layer sets the extended address internally is immediately after
-       * this function is called in mac802154_create()
+       * get reset. It is a read-only attribute and the radio driver should
+       * be in charge of managing it. We pull a local copy for us to use below.
        */
 
       priv->addr.mode = IEEE802154_ADDRMODE_EXTENDED;
-      mac802154_seteaddr(priv, priv->addr.eaddr);
       mac802154_setsaddr(priv, IEEE802154_SADDR_UNSPEC);
       mac802154_setpanid(priv, IEEE802154_PANID_UNSPEC);
 
@@ -137,6 +135,9 @@ int mac802154_req_reset(MACHANDLE mac, bool resetattr)
        * reset.
        */
 
+      priv->radio->getattr(priv->radio, IEEE802154_ATTR_MAC_EADDR, &attr);
+      IEEE802154_EADDRCOPY(priv->addr.eaddr, attr.mac.eaddr);
+
       priv->radio->getattr(priv->radio, IEEE802154_ATTR_MAC_MAX_FRAME_WAITTIME,
                             &attr);
       priv->max_frame_waittime = attr.mac.max_frame_waittime;