diff --git a/components/net/lwip-1.4.1/src/lwipopts.h b/components/net/lwip-1.4.1/src/lwipopts.h
index 7dc8af0ae..10cb7893a 100644
--- a/components/net/lwip-1.4.1/src/lwipopts.h
+++ b/components/net/lwip-1.4.1/src/lwipopts.h
@@ -306,8 +306,17 @@
  * we're limited by the command line length so you need to modify the settings
  * in this file.
  */
+#ifdef RT_LWIP_PPPOE
+#define PPPOE_SUPPORT				1
+#else
 #define PPPOE_SUPPORT               0
+#endif
+
+#ifdef RT_LWIP_PPPOS
 #define PPPOS_SUPPORT               1
+#else
+#define PPPOS_SUPPORT				0
+#endif
 
 #define PAP_SUPPORT                 1      /* Set > 0 for PAP. */
 #define CHAP_SUPPORT                1      /* Set > 0 for CHAP. */
diff --git a/components/net/lwip-1.4.1/src/netif/ppp/ppp_oe.c b/components/net/lwip-1.4.1/src/netif/ppp/ppp_oe.c
index fdf52ae23..35d192e41 100644
--- a/components/net/lwip-1.4.1/src/netif/ppp/ppp_oe.c
+++ b/components/net/lwip-1.4.1/src/netif/ppp/ppp_oe.c
@@ -262,13 +262,13 @@ pppoe_find_softc_by_hunique(u8_t *token, size_t len, struct netif *rcvif)
 
   /* should be safe to access *sc now */
   if (sc->sc_state < PPPOE_STATE_PADI_SENT || sc->sc_state >= PPPOE_STATE_SESSION) {
-    printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
-      sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
+    PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
+      sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state));
     return NULL;
   }
   if (sc->sc_ethif != rcvif) {
-    printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
-      sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
+    PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": wrong interface, not accepting host unique\n",
+      sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
     return NULL;
   }
   return sc;
@@ -319,13 +319,13 @@ pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
 #endif
   session = 0;
   if (pb->len - off < PPPOE_HEADERLEN) {
-    printf("pppoe: packet too short: %d\n", pb->len);
+    PPPDEBUG(LOG_DEBUG, ("pppoe: packet too short: %d\n", pb->len));
     goto done;
   }
 
   ph = (struct pppoehdr *) (ethhdr + 1);
   if (ph->vertype != PPPOE_VERTYPE) {
-    printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
+    PPPDEBUG(LOG_DEBUG, ("pppoe: unknown version/type packet: 0x%x\n", ph->vertype));
     goto done;
   }
   session = ntohs(ph->session);
@@ -333,8 +333,8 @@ pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
   off += sizeof(*ph);
 
   if (plen + off > pb->len) {
-    printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
-        pb->len - off, plen);
+    PPPDEBUG(LOG_DEBUG, ("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
+        pb->len - off, plen));
     goto done;
   }
   if(pb->tot_len == pb->len) {
@@ -348,7 +348,7 @@ pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
     tag = ntohs(pt.tag);
     len = ntohs(pt.len);
     if (off + sizeof(pt) + len > pb->len) {
-      printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
+      PPPDEBUG(LOG_DEBUG, ("pppoe: tag 0x%x len 0x%x is too long\n", tag, len));
       goto done;
     }
     switch (tag) {
@@ -395,9 +395,9 @@ pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
         u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
         strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
         pppoe_error_tmp[error_len-1] = '\0';
-        printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
+        PPPDEBUG(LOG_DEBUG, ("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp));
       } else {
-        printf("%s: %s\n", devname, err_msg);
+        PPPDEBUG(LOG_DEBUG, ("%s: %s\n", devname, err_msg));
       }
       if (errortag) {
         goto done;
@@ -455,19 +455,19 @@ breakbreak:;
        */
       if (ac_cookie == NULL) {
         /* be quiet if there is not a single pppoe instance */
-        printf("pppoe: received PADR but not includes ac_cookie\n");
+        PPPDEBUG(LOG_DEBUG, ("pppoe: received PADR but not includes ac_cookie\n"));
         goto done;
       }
       sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
       if (sc == NULL) {
         /* be quiet if there is not a single pppoe instance */
         if (!LIST_EMPTY(&pppoe_softc_list)) {
-          printf("pppoe: received PADR but could not find request for it\n");
+          PPPDEBUG(LOG_DEBUG, ("pppoe: received PADR but could not find request for it\n"));
         }
         goto done;
       }
       if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
-        printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
+        PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
         goto done;
       }
       if (hunique) {
@@ -493,12 +493,12 @@ breakbreak:;
       if (sc == NULL) {
         /* be quiet if there is not a single pppoe instance */
         if (pppoe_softc_list != NULL) {
-          printf("pppoe: received PADO but could not find request for it\n");
+          PPPDEBUG(LOG_DEBUG, ("pppoe: received PADO but could not find request for it\n"));
         }
         goto done;
       }
       if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
-        printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
+        PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
         goto done;
       }
       if (ac_cookie) {
@@ -532,11 +532,11 @@ breakbreak:;
       break;
     default:
       if(sc) {
-        printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
+        PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
             sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
-            (u16_t)ph->code, session);
+            (u16_t)ph->code, session));
       } else {
-        printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
+        PPPDEBUG(LOG_DEBUG, ("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session));
       }
       break;
   }
@@ -580,18 +580,18 @@ pppoe_data_input(struct netif *netif, struct pbuf *pb)
   pb = pppSingleBuf (pb);
 
   if (pb->len <= PPPOE_HEADERLEN) {
-    printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
+    PPPDEBUG(LOG_DEBUG, ("pppoe (data): dropping too short packet: %d bytes\n", pb->len));
     goto drop;
   }
 
   if (pb->len < sizeof(*ph)) {
-    printf("pppoe_data_input: could not get PPPoE header\n");
+    PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: could not get PPPoE header\n"));
     goto drop;
   }
   ph = (struct pppoehdr *)pb->payload;
 
   if (ph->vertype != PPPOE_VERTYPE) {
-    printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
+    PPPDEBUG(LOG_DEBUG, ("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype));
     goto drop;
   }
   if (ph->code != 0) {
@@ -602,8 +602,8 @@ pppoe_data_input(struct netif *netif, struct pbuf *pb)
   sc = pppoe_find_softc_by_session(session, netif);
   if (sc == NULL) {
 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
-    printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
-    pppoe_send_padt(netif, session, shost);
+    PPPDEBUG(LOG_DEBUG, ("pppoe: input for unknown session 0x%x, sending PADT\n", session);
+    pppoe_send_padt(netif, session, shost));
 #endif
     goto drop;
   }
@@ -874,7 +874,7 @@ pppoe_do_disconnect(struct pppoe_softc *sc)
 static void
 pppoe_abort_connect(struct pppoe_softc *sc)
 {
-  printf("%c%c%"U16_F": could not establish connection\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
+  PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": could not establish connection\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
   sc->sc_state = PPPOE_STATE_CLOSING;
 
   sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
@@ -1096,8 +1096,8 @@ pppoe_ifattach_hook(void *arg, struct pbuf **mp, struct netif *ifp, int dir)
     }
     if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
       sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP|IFF_RUNNING);
-      printf("%c%c%"U16_F": ethernet interface detached, going down\n",
-          sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
+      PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": ethernet interface detached, going down\n",
+          sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
     }
     sc->sc_ethif = NULL;
     pppoe_clear_softc(sc, "ethernet interface detached");