diff --git a/os/net/ipv6/tcpip.c b/os/net/ipv6/tcpip.c
index aad8ba2875c..a0b32a91a08 100644
--- a/os/net/ipv6/tcpip.c
+++ b/os/net/ipv6/tcpip.c
@@ -672,6 +672,7 @@ tcpip_ipv6_output(void)
 
   /* Look for a next hop */
   if((nexthop = get_nexthop(&ipaddr)) == NULL) {
+    LOG_WARN("output: No next-hop found, dropping packet\n");
     goto exit;
   }
   annotate_transmission(nexthop);
diff --git a/os/net/ipv6/uip-ds6.c b/os/net/ipv6/uip-ds6.c
index 98510173d2e..4efbcdbda2b 100644
--- a/os/net/ipv6/uip-ds6.c
+++ b/os/net/ipv6/uip-ds6.c
@@ -282,7 +282,7 @@ uip_ds6_prefix_add(uip_ipaddr_t *ipaddr, uint8_t ipaddrlen,
     locprefix->plifetime = ptime;
     LOG_INFO("Adding prefix ");
     LOG_INFO_6ADDR(&locprefix->ipaddr);
-    LOG_INFO_("length %u, flags %x, Valid lifetime %lx, Preffered lifetime %lx\n",
+    LOG_INFO_(" len %u, flags %x, valid/preferred lifetime %lx/%lx\n",
        ipaddrlen, flags, vtime, ptime);
     return locprefix;
   } else {
@@ -312,7 +312,7 @@ uip_ds6_prefix_add(uip_ipaddr_t *ipaddr, uint8_t ipaddrlen,
     }
     LOG_INFO("Adding prefix ");
     LOG_INFO_6ADDR(&locprefix->ipaddr);
-    LOG_INFO_("length %u, vlifetime %lu\n", ipaddrlen, interval);
+    LOG_INFO_(" len %u, valid lifetime %lu\n", ipaddrlen, interval);
     return locprefix;
   }
   return NULL;
diff --git a/os/net/mac/tsch/tsch-schedule.c b/os/net/mac/tsch/tsch-schedule.c
index 32893a7f725..25524e1461c 100644
--- a/os/net/mac/tsch/tsch-schedule.c
+++ b/os/net/mac/tsch/tsch-schedule.c
@@ -91,8 +91,7 @@ tsch_schedule_add_slotframe(uint16_t handle, uint16_t size)
       /* Add the slotframe to the global list */
       list_add(slotframe_list, sf);
     }
-    LOG_INFO("add_slotframe %u %u\n",
-           handle, size);
+    LOG_INFO("Adding slotframe %u, size %u\n", handle, size);
     tsch_release_lock();
     return sf;
   }
@@ -125,7 +124,8 @@ tsch_schedule_remove_slotframe(struct tsch_slotframe *slotframe)
 
     /* Now that the slotframe has no links, remove it. */
     if(tsch_get_lock()) {
-      LOG_INFO("remove slotframe %u %u\n", slotframe->handle, slotframe->size.val);
+      LOG_INFO("Remove slotframe %u, size %u\n",
+               slotframe->handle, slotframe->size.val);
       memb_free(&slotframe_memb, slotframe);
       list_remove(slotframe_list, slotframe);
       tsch_release_lock();
diff --git a/os/net/mac/tsch/tsch.c b/os/net/mac/tsch/tsch.c
index 3200af02f7f..3343698cbf1 100644
--- a/os/net/mac/tsch/tsch.c
+++ b/os/net/mac/tsch/tsch.c
@@ -481,7 +481,8 @@ eb_input(struct input_packet *current_input)
 
             LOG_WARN("Updating TSCH hopping sequence from EB\n");
           } else {
-            LOG_WARN("TSCH:! parse_eb: hopping sequence too long (%u)\n", eb_ies.ie_hopping_sequence_len);
+            LOG_WARN("parse_eb: Hopping sequence too long (%u)\n",
+                     eb_ies.ie_hopping_sequence_len);
           }
         }
       }
@@ -947,7 +948,7 @@ PROCESS_THREAD(tsch_send_eb_process, ev, data)
         if(!(p = tsch_queue_add_packet(&tsch_eb_address, 1, NULL, NULL))) {
           LOG_ERR("! could not enqueue EB packet\n");
         } else {
-          LOG_INFO("TSCH: enqueue EB packet %u %u\n",
+          LOG_INFO("Enqueuing EB packet %u %u\n",
                    packetbuf_totlen(), packetbuf_hdrlen());
           p->tsch_sync_ie_offset = tsch_sync_ie_offset;
           p->header_len = hdr_len;
diff --git a/os/net/packetbuf.h b/os/net/packetbuf.h
index 5a3aa9cc986..e4886eb3cba 100644
--- a/os/net/packetbuf.h
+++ b/os/net/packetbuf.h
@@ -203,12 +203,6 @@ struct packetbuf_addr {
   linkaddr_t addr;
 };
 
-#define PACKETBUF_ATTR_PACKET_TYPE_DATA      0
-#define PACKETBUF_ATTR_PACKET_TYPE_ACK       1
-#define PACKETBUF_ATTR_PACKET_TYPE_STREAM    2
-#define PACKETBUF_ATTR_PACKET_TYPE_STREAM_END 3
-#define PACKETBUF_ATTR_PACKET_TYPE_TIMESTAMP 4
-
 enum {
   PACKETBUF_ATTR_NONE,
 
diff --git a/os/net/routing/rpl-classic/rpl-dag.c b/os/net/routing/rpl-classic/rpl-dag.c
index dcdb6aebcc0..26d9d490097 100644
--- a/os/net/routing/rpl-classic/rpl-dag.c
+++ b/os/net/routing/rpl-classic/rpl-dag.c
@@ -869,7 +869,7 @@ rpl_select_dag(rpl_instance_t *instance, rpl_parent_t *p)
       rpl_print_neighbor_list();
     }
   } else if(best_dag->rank != old_rank) {
-    LOG_DBG("RPL: Preferred parent update, rank changed from %u to %u\n",
+    LOG_DBG("Preferred parent update, rank changed from %u to %u\n",
             (unsigned)old_rank, best_dag->rank);
   }
   return best_dag;
@@ -1606,9 +1606,9 @@ rpl_process_dio(uip_ipaddr_t *from, rpl_dio_t *dio)
   /* The DIO comes from a valid DAG, so we can refresh its lifetime. */
   dag->lifetime = (1UL << (instance->dio_intmin + instance->dio_intdoubl)) *
     RPL_DAG_LIFETIME / 1000;
-  LOG_INFO("Set DAG ");
-  LOG_INFO_6ADDR(&dag->dag_id);
-  LOG_INFO_(" lifetime to %ld\n", (long int)dag->lifetime);
+  LOG_DBG("Set DAG ");
+  LOG_DBG_6ADDR(&dag->dag_id);
+  LOG_DBG_(" lifetime to %ld\n", (long int)dag->lifetime);
 
   /*
    * At this point, we know that this DIO pertains to a DAG that we
@@ -1656,7 +1656,7 @@ rpl_process_dio(uip_ipaddr_t *from, rpl_dio_t *dio)
   /* Parent info has been updated, trigger rank recalculation. */
   p->flags |= RPL_PARENT_FLAG_UPDATED;
 
-  LOG_INFO("preferred DAG ");
+  LOG_INFO("Preferred DAG ");
   LOG_INFO_6ADDR(&instance->current_dag->dag_id);
   LOG_INFO_(", rank %u, min_rank %u, ",
             instance->current_dag->rank, instance->current_dag->min_rank);
diff --git a/os/net/routing/rpl-classic/rpl-ext-header.c b/os/net/routing/rpl-classic/rpl-ext-header.c
index fdf69fb5e55..32c0750bb5b 100644
--- a/os/net/routing/rpl-classic/rpl-ext-header.c
+++ b/os/net/routing/rpl-classic/rpl-ext-header.c
@@ -119,7 +119,7 @@ rpl_ext_header_hbh_update(uint8_t *ext_buf, int opt_offset)
   sender = nbr_table_get_from_lladdr(rpl_parents, packetbuf_addr(PACKETBUF_ADDR_SENDER));
 
   if(sender != NULL && (rpl_opt->flags & RPL_HDR_OPT_RANK_ERR)) {
-    /* A rank error was signalled -- attempt to repair it by updating
+    /* A rank error was signaled -- attempt to repair it by updating
        the sender's rank from the ext header. */
     sender->rank = sender_rank;
     if(RPL_IS_NON_STORING(instance)) {
@@ -135,9 +135,10 @@ rpl_ext_header_hbh_update(uint8_t *ext_buf, int opt_offset)
 
   sender_closer = sender_rank < instance->current_dag->rank;
 
-  LOG_DBG("Packet going %s, sender closer %d (%d < %d)\n",
+
+  LOG_DBG("Packet going %s, sender%s closer (%d < %d)\n",
           down == 1 ? "down" : "up",
-          sender_closer,
+          sender_closer ? "" : " not",
           sender_rank,
           instance->current_dag->rank);
 
@@ -154,14 +155,14 @@ rpl_ext_header_hbh_update(uint8_t *ext_buf, int opt_offset)
 
     if(rpl_opt->flags & RPL_HDR_OPT_RANK_ERR) {
       RPL_STAT(rpl_stats.loop_errors++);
-      LOG_ERR(" Rank error signalled in RPL option!\n");
+      LOG_ERR("Rank error signaled in RPL option!\n");
       /* Packet must be dropped and dio trickle timer reset, see
          RFC6550 - 11.2.2.2 */
       rpl_reset_dio_timer(instance);
       return 0;
     }
 
-    LOG_WARN("Single error tolerated\n");
+    LOG_WARN("One inconsistency along path is tolerated\n");
     RPL_STAT(rpl_stats.loop_warnings++);
     rpl_opt->flags |= RPL_HDR_OPT_RANK_ERR;
     return 1;
diff --git a/os/net/routing/rpl-classic/rpl-icmp6.c b/os/net/routing/rpl-classic/rpl-icmp6.c
index 3219e85dbed..8b56dda95da 100644
--- a/os/net/routing/rpl-classic/rpl-icmp6.c
+++ b/os/net/routing/rpl-classic/rpl-icmp6.c
@@ -816,8 +816,7 @@ dao_input_storing(void)
         uint8_t out_seq;
         out_seq = prepare_for_dao_fwd(sequence, rep);
 
-        LOG_DBG("Forwarding No-path DAO to parent - out_seq:%d",
-                out_seq);
+        LOG_DBG("Forwarding No-path DAO out_seq:%d to parent ", out_seq);
         LOG_DBG_6ADDR(rpl_parent_get_ipaddr(dag->preferred_parent));
         LOG_DBG_("\n");
 
diff --git a/os/net/routing/rpl-classic/rpl-private.h b/os/net/routing/rpl-classic/rpl-private.h
index de3eeb90182..1127afa3a20 100644
--- a/os/net/routing/rpl-classic/rpl-private.h
+++ b/os/net/routing/rpl-classic/rpl-private.h
@@ -150,7 +150,9 @@
 #define RPL_ROUTE_INFINITE_LIFETIME           0xFFFFFFFF
 
 #define RPL_LIFETIME(instance, lifetime) \
-          (((lifetime) == RPL_INFINITE_LIFETIME) ? RPL_ROUTE_INFINITE_LIFETIME : (unsigned long)(instance)->lifetime_unit * (lifetime))
+          (((lifetime) == RPL_INFINITE_LIFETIME) ? \
+              RPL_ROUTE_INFINITE_LIFETIME : \
+              (unsigned long)(instance)->lifetime_unit * (lifetime))
 
 
 #ifndef RPL_CONF_MIN_HOPRANKINC
diff --git a/os/net/routing/rpl-lite/rpl.c b/os/net/routing/rpl-lite/rpl.c
index 7200e828add..e2f336054cd 100644
--- a/os/net/routing/rpl-lite/rpl.c
+++ b/os/net/routing/rpl-lite/rpl.c
@@ -110,7 +110,8 @@ rpl_link_callback(const linkaddr_t *addr, int status, int numtx)
       Updating from here is unsafe; postpone */
       LOG_INFO("packet sent to ");
       LOG_INFO_LLADDR(addr);
-      LOG_INFO_(", status %u, tx %u, new link metric %u\n", status, numtx, rpl_neighbor_get_link_metric(nbr));
+      LOG_INFO_(", status %u, tx %u, new link metric %u\n",
+                status, numtx, rpl_neighbor_get_link_metric(nbr));
       rpl_timers_schedule_state_update();
     }
   }