diff --git a/net/arp/arp_arpin.c b/net/arp/arp_arpin.c
index 438125f7bd587dce10bae908d7382ea7a4abc097..fcd84b4b85d7c755a57c0fd1ae7c709b1ffe9d7d 100644
--- a/net/arp/arp_arpin.c
+++ b/net/arp/arp_arpin.c
@@ -96,7 +96,7 @@ void arp_arpin(FAR struct net_driver_s *dev)
 
   if (dev->d_len < (sizeof(struct arp_hdr_s) + ETH_HDRLEN))
     {
-      nllerr("Too small\n");
+      nllerr("ERROR: Packet Too small\n");
       dev->d_len = 0;
       return;
     }
diff --git a/net/devif/devif_callback.c b/net/devif/devif_callback.c
index 2508f2d0f0679969a319994f12f1592caec6ba23..f5d794ad0b4a0c401463022eeeaa0646a70e4e1c 100644
--- a/net/devif/devif_callback.c
+++ b/net/devif/devif_callback.c
@@ -260,7 +260,7 @@ FAR struct devif_callback_s *
 #ifdef CONFIG_DEBUG_FEATURES
   else
     {
-      nllerr("Failed to allocate callback\n");
+      nllerr("ERROR: Failed to allocate callback\n");
     }
 #endif
 
diff --git a/net/devif/ipv4_input.c b/net/devif/ipv4_input.c
index 9b02f2ac3f88f297b2153b973b93457c51808435..778ff18b745d213afea76ff6bfcae6b3cf2c99f9 100644
--- a/net/devif/ipv4_input.c
+++ b/net/devif/ipv4_input.c
@@ -339,7 +339,8 @@ int ipv4_input(FAR struct net_driver_s *dev)
       g_netstats.ipv4.drop++;
       g_netstats.ipv4.vhlerr++;
 #endif
-      nllerr("Invalid IP version or header length: %02x\n", pbuf->vhl);
+      nllerr("ERROR: Invalid IP version or header length: %02x\n",
+             pbuf->vhl);
       goto drop;
     }
 
@@ -348,7 +349,7 @@ int ipv4_input(FAR struct net_driver_s *dev)
   hdrlen = NET_LL_HDRLEN(dev);
   if ((hdrlen + IPv4_HDRLEN) > dev->d_len)
     {
-      nllerr("Packet shorter than IPv4 header\n");
+      nllerr("ERROR: Packet shorter than IPv4 header\n");
       goto drop;
     }
 
@@ -368,7 +369,7 @@ int ipv4_input(FAR struct net_driver_s *dev)
     }
   else
     {
-      nllerr("IP packet shorter than length in IP header\n");
+      nllerr("ERROR: IP packet shorter than length in IP header\n");
       goto drop;
     }
 
@@ -387,7 +388,7 @@ int ipv4_input(FAR struct net_driver_s *dev)
       g_netstats.ipv4.drop++;
       g_netstats.ipv4.fragerr++;
 #endif
-      nllerr("IP fragment dropped\n");
+      nllerr("ERROR: IP fragment dropped\n");
       goto drop;
 #endif /* CONFIG_NET_TCP_REASSEMBLY */
     }
@@ -413,7 +414,7 @@ int ipv4_input(FAR struct net_driver_s *dev)
 #ifdef CONFIG_NET_ICMP
   if (net_ipv4addr_cmp(dev->d_ipaddr, INADDR_ANY))
     {
-      nllerr("No IP address assigned\n");
+      nllerr("ERROR: No IP address assigned\n");
       goto drop;
     }
 
@@ -446,7 +447,7 @@ int ipv4_input(FAR struct net_driver_s *dev)
       g_netstats.ipv4.drop++;
       g_netstats.ipv4.chkerr++;
 #endif
-      nllerr("Bad IP checksum\n");
+      nllerr("ERROR: Bad IP checksum\n");
       goto drop;
     }
 
@@ -494,7 +495,7 @@ int ipv4_input(FAR struct net_driver_s *dev)
         g_netstats.ipv4.protoerr++;
 #endif
 
-        nllerr("Unrecognized IP protocol\n");
+        nllerr("ERROR: Unrecognized IP protocol\n");
         goto drop;
     }
 
diff --git a/net/devif/ipv6_input.c b/net/devif/ipv6_input.c
index 0378b2c27053e826ec3b7fdcb689aa04d84b85de..547193825dbee0be77352fb015b1a5328045b0d2 100644
--- a/net/devif/ipv6_input.c
+++ b/net/devif/ipv6_input.c
@@ -160,7 +160,7 @@ int ipv6_input(FAR struct net_driver_s *dev)
   hdrlen = NET_LL_HDRLEN(dev);
   if ((hdrlen + IPv6_HDRLEN) > dev->d_len)
     {
-      nllerr("Packet shorter than IPv6 header\n");
+      nllerr("ERROR: Packet shorter than IPv6 header\n");
       goto drop;
     }
 
diff --git a/net/icmp/icmp_input.c b/net/icmp/icmp_input.c
index befda6bf04ff08551d1035a81c349fc36c31de89..368795e1efbbb4687ffca516d939c4d3b02cfe1e 100644
--- a/net/icmp/icmp_input.c
+++ b/net/icmp/icmp_input.c
@@ -164,7 +164,7 @@ void icmp_input(FAR struct net_driver_s *dev)
 
   else
     {
-      nllerr("Unknown ICMP cmd: %d\n", picmp->type);
+      nllerr("ERROR: Unknown ICMP cmd: %d\n", picmp->type);
       goto typeerr;
     }
 
diff --git a/net/icmp/icmp_ping.c b/net/icmp/icmp_ping.c
index 075e6aae0d6aec2154f049ab5449c2b0abccb38b..73f29ff0daf83825f14ff8e6d2faf2aeb791a453 100644
--- a/net/icmp/icmp_ping.c
+++ b/net/icmp/icmp_ping.c
@@ -262,12 +262,12 @@ static uint16_t ping_interrupt(FAR struct net_driver_s *dev, FAR void *conn,
                * that the destination address is not reachable.
                */
 
-              nllerr("Not reachable\n");
+              nllerr("ERROR:Not reachable\n");
               failcode = -ENETUNREACH;
             }
           else
             {
-              nllerr("Ping timeout\n");
+              nllerr("ERROR:Ping timeout\n");
               failcode = -ETIMEDOUT;
             }
 
@@ -416,7 +416,7 @@ int icmp_ping(in_addr_t addr, uint16_t id, uint16_t seqno, uint16_t datalen,
     }
   else
     {
-      nllerr("Return error=%d\n", -state.png_result);
+      nllerr("ERROR: Return error=%d\n", -state.png_result);
       return state.png_result;
     }
 }
diff --git a/net/icmpv6/icmpv6_input.c b/net/icmpv6/icmpv6_input.c
index a0ef9635891cd50f74534ad2e0040ae3ad0e44aa..cf65480a1253d2e891e085668d354849897de4d4 100644
--- a/net/icmpv6/icmpv6_input.c
+++ b/net/icmpv6/icmpv6_input.c
@@ -307,7 +307,7 @@ void icmpv6_input(FAR struct net_driver_s *dev)
 
     default:
       {
-        nllerr("Unknown ICMPv6 type: %d\n", icmp->type);
+        nllerr("ERROR: Unknown ICMPv6 type: %d\n", icmp->type);
         goto icmpv6_type_error;
       }
     }
diff --git a/net/icmpv6/icmpv6_ping.c b/net/icmpv6/icmpv6_ping.c
index da5b1701b9e813de300b31677762e3b982b7768e..7f3e7c8e4eb629910108ca98774f3f56b3bb944d 100644
--- a/net/icmpv6/icmpv6_ping.c
+++ b/net/icmpv6/icmpv6_ping.c
@@ -336,12 +336,12 @@ static uint16_t ping_interrupt(FAR struct net_driver_s *dev, FAR void *conn,
                * reason is that the destination address is not reachable.
                */
 
-              nllerr("Not reachable\n");
+              nllerr("ERROR: Not reachable\n");
               failcode = -ENETUNREACH;
             }
           else
             {
-              nllerr("Ping timeout\n");
+              nllerr("ERROR: Ping timeout\n");
               failcode = -ETIMEDOUT;
             }
 
@@ -490,7 +490,7 @@ int icmpv6_ping(net_ipv6addr_t addr, uint16_t id, uint16_t seqno,
     }
   else
     {
-      nllerr("Return error=%d\n", -state.png_result);
+      nllerr("ERROR: Return error=%d\n", -state.png_result);
       return state.png_result;
     }
 }
diff --git a/net/igmp/igmp_group.c b/net/igmp/igmp_group.c
index b8e673cceac39003eaab43c7622a8855340c866f..dc1a3e36129286fefe2ffc5b51116dc7afc282ab 100644
--- a/net/igmp/igmp_group.c
+++ b/net/igmp/igmp_group.c
@@ -194,7 +194,7 @@ void igmp_grpinit(void)
   FAR struct igmp_group_s *group;
   int i;
 
-  grpllerr("Initializing\n");
+  grpllinfo("Initializing\n");
 
 #if CONFIG_PREALLOC_IGMPGROUPS > 0
   for (i = 0; i < CONFIG_PREALLOC_IGMPGROUPS; i++)
@@ -226,20 +226,20 @@ FAR struct igmp_group_s *igmp_grpalloc(FAR struct net_driver_s *dev,
   if (up_interrupt_context())
     {
 #if CONFIG_PREALLOC_IGMPGROUPS > 0
-      grpllerr("Use a pre-allocated group entry\n");
+      grpllinfo("Use a pre-allocated group entry\n");
       group = igmp_grpprealloc();
 #else
-      grpllerr("Cannot allocate from interrupt handler\n");
+      grpllerr("ERROR: Cannot allocate from interrupt handler\n");
       group = NULL;
 #endif
     }
   else
     {
-      grpllerr("Allocate from the heap\n");
+      grpllinfo("Allocate from the heap\n");
       group = igmp_grpheapalloc();
     }
 
-  grpllerr("group: %p\n", group);
+  grpllinfo("group: %p\n", group);
 
   /* Check if we successfully allocated a group structure */
 
@@ -285,7 +285,7 @@ FAR struct igmp_group_s *igmp_grpfind(FAR struct net_driver_s *dev,
   FAR struct igmp_group_s *group;
   net_lock_t flags;
 
-  grpllerr("Searching for addr %08x\n", (int)*addr);
+  grpllinfo("Searching for addr %08x\n", (int)*addr);
 
   /* We must disable interrupts because we don't which context we were
    * called from.
@@ -296,10 +296,10 @@ FAR struct igmp_group_s *igmp_grpfind(FAR struct net_driver_s *dev,
        group;
        group = group->next)
     {
-      grpllerr("Compare: %08x vs. %08x\n", group->grpaddr, *addr);
+      grpllinfo("Compare: %08x vs. %08x\n", group->grpaddr, *addr);
       if (net_ipv4addr_cmp(group->grpaddr, *addr))
         {
-          grpllerr("Match!\n");
+          grpllinfo("Match!\n");
           break;
         }
     }
@@ -325,13 +325,13 @@ FAR struct igmp_group_s *igmp_grpallocfind(FAR struct net_driver_s *dev,
 {
   FAR struct igmp_group_s *group = igmp_grpfind(dev, addr);
 
-  grpllerr("group: %p addr: %08x\n", group, (int)*addr);
+  grpllinfo("group: %p addr: %08x\n", group, (int)*addr);
   if (!group)
     {
       group = igmp_grpalloc(dev, addr);
     }
 
-  grpllerr("group: %p\n", group);
+  grpllinfo("group: %p\n", group);
   return group;
 }
 
@@ -350,7 +350,7 @@ void igmp_grpfree(FAR struct net_driver_s *dev, FAR struct igmp_group_s *group)
 {
   net_lock_t flags;
 
-  grpllerr("Free: %p flags: %02x\n", group, group->flags);
+  grpllinfo("Free: %p flags: %02x\n", group, group->flags);
 
   /* Cancel the wdog */
 
@@ -376,7 +376,7 @@ void igmp_grpfree(FAR struct net_driver_s *dev, FAR struct igmp_group_s *group)
 #if CONFIG_PREALLOC_IGMPGROUPS > 0
   if (IS_PREALLOCATED(group->flags))
     {
-      grpllerr("Put back on free list\n");
+      grpllinfo("Put back on free list\n");
       sq_addlast((FAR sq_entry_t *)group, &g_freelist);
       net_unlock(flags);
     }
@@ -388,7 +388,7 @@ void igmp_grpfree(FAR struct net_driver_s *dev, FAR struct igmp_group_s *group)
        */
 
       net_unlock(flags);
-      grpllerr("Call sched_kfree()\n");
+      grpllinfo("Call sched_kfree()\n");
       sched_kfree(group);
     }
 }
diff --git a/net/igmp/igmp_input.c b/net/igmp/igmp_input.c
index d8bba1d1531fb44f488139d37649a83897a0cc91..7d3daa14f48380a731571909a9068ce2f1ab4e5d 100644
--- a/net/igmp/igmp_input.c
+++ b/net/igmp/igmp_input.c
@@ -124,7 +124,7 @@ void igmp_input(struct net_driver_s *dev)
   if (dev->d_len < NET_LL_HDRLEN(dev) + IPIGMP_HDRLEN)
     {
       IGMP_STATINCR(g_netstats.igmp.length_errors);
-      nllerr("Length error\n");
+      nllerr("ERROR: Length error\n");
       return;
     }
 
@@ -133,7 +133,7 @@ void igmp_input(struct net_driver_s *dev)
   if (net_chksum((FAR uint16_t *)&IGMPBUF->type, IGMP_HDRLEN) != 0)
     {
       IGMP_STATINCR(g_netstats.igmp.chksum_errors);
-      nllerr("Checksum error\n");
+      nllerr("ERROR: Checksum error\n");
       return;
     }
 
@@ -143,7 +143,7 @@ void igmp_input(struct net_driver_s *dev)
   group = igmp_grpallocfind(dev, &destipaddr);
   if (!group)
     {
-      nllerr("Failed to allocate/find group: %08x\n", destipaddr);
+      nllerr("ERROR: Failed to allocate/find group: %08x\n", destipaddr);
       return;
     }
 
@@ -192,7 +192,7 @@ void igmp_input(struct net_driver_s *dev)
                     IGMP_STATINCR(g_netstats.igmp.v1_received);
                     IGMPBUF->maxresp = 10;
 
-                    nllerr("V1 not implemented\n");
+                    nllerr("ERROR: V1 not implemented\n");
                   }
 
                 IGMP_STATINCR(g_netstats.igmp.query_received);
@@ -241,7 +241,7 @@ void igmp_input(struct net_driver_s *dev)
             nllinfo("Unicast query\n");
             IGMP_STATINCR(g_netstats.igmp.ucast_query);
 
-            nllerr("Query to a specific group with the group address as destination\n");
+            nllinfo("Query to a specific group with the group address as destination\n");
 
             ticks = net_dsec2tick((int)IGMPBUF->maxresp);
             if (IS_IDLEMEMBER(group->flags) || igmp_cmptimer(group, ticks))
@@ -270,7 +270,7 @@ void igmp_input(struct net_driver_s *dev)
 
       default:
         {
-          nllerr("Unexpected msg %02x\n", IGMPBUF->type);
+          nllerr("ERROR: Unexpected msg %02x\n", IGMPBUF->type);
         }
       break;
     }
diff --git a/net/igmp/igmp_leave.c b/net/igmp/igmp_leave.c
index eb970ae1276c046e15c8dfb5e7cbd3515fdaeef0..8e40451101b68d76dc76531a64eabc501ff21967 100644
--- a/net/igmp/igmp_leave.c
+++ b/net/igmp/igmp_leave.c
@@ -134,7 +134,7 @@ int igmp_leavegroup(struct net_driver_s *dev, FAR const struct in_addr *grpaddr)
   /* Find the entry corresponding to the address leaving the group */
 
   group = igmp_grpfind(dev, &grpaddr->s_addr);
-  nerr("Leaving group: %p\n", group);
+  ninfo("Leaving group: %p\n", group);
   if (group)
     {
       /* Cancel the timer and discard any queued Membership Reports.  Canceling
@@ -155,7 +155,7 @@ int igmp_leavegroup(struct net_driver_s *dev, FAR const struct in_addr *grpaddr)
 
       if (IS_LASTREPORT(group->flags))
         {
-          nerr("Schedule Leave Group message\n");
+          ninfo("Schedule Leave Group message\n");
           IGMP_STATINCR(g_netstats.igmp.leave_sched);
           igmp_waitmsg(group, IGMP_LEAVE_GROUP);
         }
diff --git a/net/igmp/igmp_timer.c b/net/igmp/igmp_timer.c
index bd265989915b93146d134532f66874e6aa7a38ee..0725d1805ea27f7d2841ffa4e157acaf477dec4a 100644
--- a/net/igmp/igmp_timer.c
+++ b/net/igmp/igmp_timer.c
@@ -170,7 +170,7 @@ void igmp_startticks(FAR struct igmp_group_s *group, unsigned int ticks)
 
   /* Start the timer */
 
-  gtmrllerr("ticks: %d\n", ticks);
+  gtmrllinfo("ticks: %d\n", ticks);
 
   ret = wd_start(group->wdog, ticks, igmp_timeout, 1, (uint32_t)group);
 
@@ -184,7 +184,7 @@ void igmp_starttimer(FAR struct igmp_group_s *group, uint8_t decisecs)
    * Important!! this should be a random timer from 0 to decisecs
    */
 
-  gtmrerr("decisecs: %d\n", decisecs);
+  gtmrinfo("decisecs: %d\n", decisecs);
   igmp_startticks(group, net_dsec2tick(decisecs));
 }
 
@@ -224,7 +224,7 @@ bool igmp_cmptimer(FAR struct igmp_group_s *group, int maxticks)
    * test as well.
    */
 
-  gtmrerr("maxticks: %d remaining: %d\n", maxticks, remaining);
+  gtmrinfo("maxticks: %d remaining: %d\n", maxticks, remaining);
   if (maxticks > remaining)
     {
       /* Cancel the watchdog timer and return true */
diff --git a/net/iob/iob_clone.c b/net/iob/iob_clone.c
index a0a5bd5c50b1687bc6ad814472a9ee0fe2195da0..eb55a496bcf976fd01d38df97090d36a33b8ede7 100644
--- a/net/iob/iob_clone.c
+++ b/net/iob/iob_clone.c
@@ -168,7 +168,7 @@ int iob_clone(FAR struct iob_s *iob1, FAR struct iob_s *iob2, bool throttled)
           next = iob_alloc(throttled);
           if (!next)
             {
-              nerr("Failed to allocate an I/O buffer/n");
+              nerr("ERROR: Failed to allocate an I/O buffer/n");
               return -ENOMEM;
             }
 
diff --git a/net/iob/iob_trimtail.c b/net/iob/iob_trimtail.c
index 6ab2add71e47e6b5d75cbc304267bedba0108f07..cfcfd68b264e3c374b60ab3418b19ba122f3b98e 100644
--- a/net/iob/iob_trimtail.c
+++ b/net/iob/iob_trimtail.c
@@ -72,7 +72,7 @@ FAR struct iob_s *iob_trimtail(FAR struct iob_s *iob, unsigned int trimlen)
   FAR struct iob_s *last;
   int len;
 
-  nllerr("iob=%p pktlen=%d trimlen=%d\n", iob, iob->io_pktlen, trimlen);
+  nllinfo("iob=%p pktlen=%d trimlen=%d\n", iob, iob->io_pktlen, trimlen);
 
   if (iob && trimlen > 0)
     {
diff --git a/net/local/local_netpoll.c b/net/local/local_netpoll.c
index 03ef0bc6d6380d294fbd33ff4afddbfb9c1f1a76..4b100d67d029dffaf2647838fb9d31611d0094cc 100644
--- a/net/local/local_netpoll.c
+++ b/net/local/local_netpoll.c
@@ -152,7 +152,7 @@ void local_accept_pollnotify(FAR struct local_conn_s *conn,
           fds->revents |= (fds->events & eventset);
           if (fds->revents != 0)
             {
-              nerr("Report events: %02x\n", fds->revents);
+              ninfo("Report events: %02x\n", fds->revents);
               sem_post(fds->sem);
             }
         }
diff --git a/net/netdev/netdev_register.c b/net/netdev/netdev_register.c
index dfa0b6710dda7a2e2d1cb1c445cd5ac1871f00de..bdd9a812fbdd014edaa6b94f58848e803ca4d1cd 100644
--- a/net/netdev/netdev_register.c
+++ b/net/netdev/netdev_register.c
@@ -319,13 +319,13 @@ int netdev_register(FAR struct net_driver_s *dev, enum net_lltype_e lltype)
       net_unlock(save);
 
 #ifdef CONFIG_NET_ETHERNET
-      nllerr("Registered MAC: %02x:%02x:%02x:%02x:%02x:%02x as dev: %s\n",
-             dev->d_mac.ether_addr_octet[0], dev->d_mac.ether_addr_octet[1],
-             dev->d_mac.ether_addr_octet[2], dev->d_mac.ether_addr_octet[3],
-             dev->d_mac.ether_addr_octet[4], dev->d_mac.ether_addr_octet[5],
-             dev->d_ifname);
+      nllinfo("Registered MAC: %02x:%02x:%02x:%02x:%02x:%02x as dev: %s\n",
+              dev->d_mac.ether_addr_octet[0], dev->d_mac.ether_addr_octet[1],
+              dev->d_mac.ether_addr_octet[2], dev->d_mac.ether_addr_octet[3],
+              dev->d_mac.ether_addr_octet[4], dev->d_mac.ether_addr_octet[5],
+              dev->d_ifname);
 #else
-      nllerr("Registered dev: %s\n", dev->d_ifname);
+      nllinfo("Registered dev: %s\n", dev->d_ifname);
 #endif
       return OK;
     }
diff --git a/net/netdev/netdev_unregister.c b/net/netdev/netdev_unregister.c
index f8861c7fad6ee5ac0ecef0e4b7562debd1040b7b..8509a5733c6f391d3e28ffe3e5d5dbb32b7f49b5 100644
--- a/net/netdev/netdev_unregister.c
+++ b/net/netdev/netdev_unregister.c
@@ -128,13 +128,13 @@ int netdev_unregister(FAR struct net_driver_s *dev)
       net_unlock(save);
 
 #ifdef CONFIG_NET_ETHERNET
-      nllerr("Unregistered MAC: %02x:%02x:%02x:%02x:%02x:%02x as dev: %s\n",
-             dev->d_mac.ether_addr_octet[0], dev->d_mac.ether_addr_octet[1],
-             dev->d_mac.ether_addr_octet[2], dev->d_mac.ether_addr_octet[3],
-             dev->d_mac.ether_addr_octet[4], dev->d_mac.ether_addr_octet[5],
-             dev->d_ifname);
+      nllinfo("Unregistered MAC: %02x:%02x:%02x:%02x:%02x:%02x as dev: %s\n",
+              dev->d_mac.ether_addr_octet[0], dev->d_mac.ether_addr_octet[1],
+              dev->d_mac.ether_addr_octet[2], dev->d_mac.ether_addr_octet[3],
+              dev->d_mac.ether_addr_octet[4], dev->d_mac.ether_addr_octet[5],
+              dev->d_ifname);
 #else
-      nllerr("Registered dev: %s\n", dev->d_ifname);
+      nllinfo("Registered dev: %s\n", dev->d_ifname);
 #endif
       return OK;
     }
diff --git a/net/pkt/pkt_input.c b/net/pkt/pkt_input.c
index 102ef81ae3901d3eba0c01d9113da335e5662c38..e7969cd8f00a82c2e6d70c5d459cc517b47be90e 100644
--- a/net/pkt/pkt_input.c
+++ b/net/pkt/pkt_input.c
@@ -118,7 +118,7 @@ int pkt_input(struct net_driver_s *dev)
     }
   else
     {
-      nllerr("No listener\n");
+      nllerr("ERROR: No listener\n");
     }
 
   return ret;
diff --git a/net/pkt/pkt_poll.c b/net/pkt/pkt_poll.c
index 697377d401ba69dd13df475533e96460c6e1b51b..0b1f12f87331537270b1e874335254c04f26ea6d 100644
--- a/net/pkt/pkt_poll.c
+++ b/net/pkt/pkt_poll.c
@@ -78,7 +78,7 @@
 
 void pkt_poll(FAR struct net_driver_s *dev, FAR struct pkt_conn_s *conn)
 {
-  nllerr("IN\n");
+  nllinfo("IN\n");
 
   /* Verify that the packet connection is valid */
 
diff --git a/net/socket/net_clone.c b/net/socket/net_clone.c
index c819b6ebe43e2608443b70a9c6403317cab03d25..e76f4ed2ceead7d06e84392039640bec04a4c332 100644
--- a/net/socket/net_clone.c
+++ b/net/socket/net_clone.c
@@ -116,7 +116,7 @@ int net_clone(FAR struct socket *psock1, FAR struct socket *psock2)
   else
 #endif
     {
-      nerr("Unsupported type: %d\n", psock2->s_type);
+      nerr("ERROR: Unsupported type: %d\n", psock2->s_type);
       ret = -EBADF;
     }
 
diff --git a/net/socket/net_close.c b/net/socket/net_close.c
index f994cf6609fe1a85be51909490281f4fc8221192..c4f2e5ca3a830dbbba03cebd62e504bb131c877c 100644
--- a/net/socket/net_close.c
+++ b/net/socket/net_close.c
@@ -209,7 +209,7 @@ static uint16_t netclose_interrupt(FAR struct net_driver_s *dev,
     {
       /* Yes.. Wake up the waiting thread and report the timeout */
 
-      nllerr("CLOSE timeout\n");
+      nllerr("ERROR: CLOSE timeout\n");
       pstate->cl_result = -ETIMEDOUT;
       goto end_wait;
     }
diff --git a/net/socket/net_sendfile.c b/net/socket/net_sendfile.c
index b380258c2bc206955608683ae2d45e742986b62f..c1c42b4b31300a319307d9f6acaec7446b95fbfa 100644
--- a/net/socket/net_sendfile.c
+++ b/net/socket/net_sendfile.c
@@ -206,7 +206,7 @@ static uint16_t ack_interrupt(FAR struct net_driver_s *dev, FAR void *pvconn,
     }
   else if ((flags & TCP_REXMIT) != 0)
     {
-      nllerr("REXMIT\n");
+      nllwarn("WARNING: TCP_REXMIT\n");
 
       /* Yes.. in this case, reset the number of bytes that have been sent
        * to the number of bytes that have been ACKed.
@@ -221,7 +221,7 @@ static uint16_t ack_interrupt(FAR struct net_driver_s *dev, FAR void *pvconn,
     {
       /* Report not connected */
 
-      nllerr("Lost connection\n");
+      nllwarn("WARNING: Lost connection\n");
 
       net_lostconnection(pstate->snd_sock, flags);
       pstate->snd_sent = -ENOTCONN;
@@ -345,7 +345,7 @@ static uint16_t sendfile_interrupt(FAR struct net_driver_s *dev, FAR void *pvcon
     {
       /* Report not connected */
 
-      nllerr("Lost connection\n");
+      nllwarn("WARNING: Lost connection\n");
 
       net_lostconnection(pstate->snd_sock, flags);
       pstate->snd_sent = -ENOTCONN;
@@ -386,7 +386,7 @@ static uint16_t sendfile_interrupt(FAR struct net_driver_s *dev, FAR void *pvcon
           if (ret < 0)
             {
               int errcode = get_errno();
-              nllerr("failed to lseek: %d\n", errcode);
+              nllerr("ERROR: Failed to lseek: %d\n", errcode);
               pstate->snd_sent = -errcode;
               goto end_wait;
             }
@@ -395,7 +395,7 @@ static uint16_t sendfile_interrupt(FAR struct net_driver_s *dev, FAR void *pvcon
           if (ret < 0)
             {
               int errcode = get_errno();
-              nllerr("failed to read from input file: %d\n", errcode);
+              nllerr("ERROR: Failed to read from input file: %d\n", errcode);
               pstate->snd_sent = -errcode;
               goto end_wait;
             }
@@ -430,7 +430,7 @@ static uint16_t sendfile_interrupt(FAR struct net_driver_s *dev, FAR void *pvcon
         }
       else
         {
-          nllerr("Window full, wait for ack\n");
+          nllwarn("WARNING: Window full, wait for ack\n");
           goto wait;
         }
     }
@@ -444,7 +444,7 @@ static uint16_t sendfile_interrupt(FAR struct net_driver_s *dev, FAR void *pvcon
     {
       /* Yes.. report the timeout */
 
-      nllerr("SEND timeout\n");
+      nllwarn("WARNING: SEND timeout\n");
       pstate->snd_sent = -ETIMEDOUT;
       goto end_wait;
     }
@@ -687,7 +687,7 @@ ssize_t net_sendfile(int outfd, struct file *infile, off_t *offset,
 
   if (state.snd_datacb == NULL)
     {
-      nllerr("Failed to allocate data callback\n");
+      nllerr("ERROR: Failed to allocate data callback\n");
       errcode = ENOMEM;
       goto errout_locked;
     }
@@ -696,7 +696,7 @@ ssize_t net_sendfile(int outfd, struct file *infile, off_t *offset,
 
   if (state.snd_ackcb == NULL)
     {
-      nllerr("Failed to allocate ack callback\n");
+      nllerr("ERROR: Failed to allocate ack callback\n");
       errcode = ENOMEM;
       goto errout_datacb;
     }
diff --git a/net/tcp/tcp_backlog.c b/net/tcp/tcp_backlog.c
index 0e85141c588c23d73e31676b9e4f3fcc18850d88..ad5e6893239aa6600ae916cd224deb75c7e646d0 100644
--- a/net/tcp/tcp_backlog.c
+++ b/net/tcp/tcp_backlog.c
@@ -109,7 +109,7 @@ int tcp_backlogcreate(FAR struct tcp_conn_s *conn, int nblg)
       bls = (FAR struct tcp_backlog_s *)kmm_zalloc(size);
       if (!bls)
         {
-          nllerr("Failed to allocate backlog\n");
+          nllerr("ERROR: Failed to allocate backlog\n");
           return -ENOMEM;
         }
 
@@ -239,7 +239,7 @@ int tcp_backlogadd(FAR struct tcp_conn_s *conn, FAR struct tcp_conn_s *blconn)
       blc = (FAR struct tcp_blcontainer_s *)sq_remfirst(&bls->bl_free);
       if (!blc)
         {
-          nllerr("Failed to allocate container\n");
+          nllerr("ERROR: Failed to allocate container\n");
           ret = -ENOMEM;
         }
       else
@@ -390,7 +390,7 @@ int tcp_backlogdelete(FAR struct tcp_conn_s *conn,
             }
         }
 
-      nllerr("Failed to find pending connection\n");
+      nllerr("ERROR: Failed to find pending connection\n");
       return -EINVAL;
     }
 
diff --git a/net/tcp/tcp_conn.c b/net/tcp/tcp_conn.c
index 6501a80ecf6be3178c2d633f9759e2478e357827..fa11c42c4a1b311f3659cc90e27e36c6ffe5ec51 100644
--- a/net/tcp/tcp_conn.c
+++ b/net/tcp/tcp_conn.c
@@ -532,7 +532,7 @@ static inline int tcp_ipv4_bind(FAR struct tcp_conn_s *conn,
 
   if (port < 0)
     {
-      nerr("tcp_selectport failed: %d\n", port);
+      nerr("ERROR: tcp_selectport failed: %d\n", port);
       return port;
     }
 
@@ -552,7 +552,7 @@ static inline int tcp_ipv4_bind(FAR struct tcp_conn_s *conn,
     {
       /* If no device is found, then the address is not reachable */
 
-      nerr("tcp_local_ipv4_device failed: %d\n", ret);
+      nerr("ERROR: tcp_local_ipv4_device failed: %d\n", ret);
 
       /* Back out the local address setting */
 
@@ -613,7 +613,7 @@ static inline int tcp_ipv6_bind(FAR struct tcp_conn_s *conn,
 
   if (port < 0)
     {
-      nerr("tcp_selectport failed: %d\n", port);
+      nerr("ERROR: tcp_selectport failed: %d\n", port);
       return port;
     }
 
@@ -633,7 +633,7 @@ static inline int tcp_ipv6_bind(FAR struct tcp_conn_s *conn,
     {
       /* If no device is found, then the address is not reachable */
 
-      nerr("tcp_local_ipv6_device failed: %d\n", ret);
+      nerr("ERROR: tcp_local_ipv6_device failed: %d\n", ret);
 
       /* Back out the local address setting */
 
@@ -760,7 +760,7 @@ FAR struct tcp_conn_s *tcp_alloc(uint8_t domain)
 
       if (conn != NULL)
         {
-          nllerr("Closing unestablished connection: %p\n", conn);
+          nllwarn("WARNING: Closing unestablished connection: %p\n", conn);
 
           /* Yes... free it.  This will remove the connection from the list
            * of active connections and release all resources held by the
@@ -1066,7 +1066,7 @@ FAR struct tcp_conn_s *tcp_alloc_accept(FAR struct net_driver_s *dev,
            * probably really just assert here.
            */
 
-          nerr("Failed to find network device: %d\n", ret);
+          nerr("ERROR: Failed to find network device: %d\n", ret);
           tcp_free(conn);
           return NULL;
         }
@@ -1320,7 +1320,7 @@ int tcp_connect(FAR struct tcp_conn_s *conn, FAR const struct sockaddr *addr)
        * just assert here.
        */
 
-      nerr("Failed to find network device: %d\n", ret);
+      nerr("ERROR: Failed to find network device: %d\n", ret);
       goto errout_with_lock;
     }
 
diff --git a/net/tcp/tcp_input.c b/net/tcp/tcp_input.c
index 3a4cc556745162953e8eef7b4f68b7c9e96f4c15..757efe9cfc3843cad3e085152d8ca52df62bfe9b 100644
--- a/net/tcp/tcp_input.c
+++ b/net/tcp/tcp_input.c
@@ -126,7 +126,7 @@ static void tcp_input(FAR struct net_driver_s *dev, unsigned int iplen)
       g_netstats.tcp.drop++;
       g_netstats.tcp.chkerr++;
 #endif
-      nllerr("Bad TCP checksum\n");
+      nllerr("ERROR: Bad TCP checksum\n");
       goto drop;
     }
 
@@ -206,7 +206,7 @@ static void tcp_input(FAR struct net_driver_s *dev, unsigned int iplen)
 #ifdef CONFIG_NET_STATISTICS
               g_netstats.tcp.syndrop++;
 #endif
-              nllerr("No free TCP connections\n");
+              nllerr("ERROR: No free TCP connections\n");
               goto drop;
             }
 
@@ -308,7 +308,7 @@ found:
   if ((tcp->flags & TCP_RST) != 0)
     {
       conn->tcpstateflags = TCP_CLOSED;
-      nllerr("RESET - TCP state: TCP_CLOSED\n");
+      nllwarn("WARNING: RESET - TCP state: TCP_CLOSED\n");
 
       (void)tcp_callback(dev, conn, TCP_ABORT);
       goto drop;
diff --git a/net/tcp/tcp_send_buffered.c b/net/tcp/tcp_send_buffered.c
index 2ae4d36daa8b911220988dd9cd98eee87f77eae3..fb67556ae6fec051bed45e31d6492108e3987b04 100644
--- a/net/tcp/tcp_send_buffered.c
+++ b/net/tcp/tcp_send_buffered.c
@@ -566,7 +566,8 @@ static uint16_t psock_send_interrupt(FAR struct net_driver_s *dev,
 
           if (++WRB_NRTX(wrb) >= TCP_MAXRTX)
             {
-              nllerr("Expiring wrb=%p nrtx=%u\n", wrb, WRB_NRTX(wrb));
+              nllerr("ERROR: Expiring wrb=%p nrtx=%u\n",
+                     wrb, WRB_NRTX(wrb));
 
               /* The maximum retry count as been exhausted. Remove the write
                * buffer at the head of the queue.
@@ -631,7 +632,8 @@ static uint16_t psock_send_interrupt(FAR struct net_driver_s *dev,
 
           if (++WRB_NRTX(wrb) >= TCP_MAXRTX)
             {
-              nllerr("Expiring wrb=%p nrtx=%u\n", wrb, WRB_NRTX(wrb));
+              nllerr("ERROR: Expiring wrb=%p nrtx=%u\n",
+                     wrb, WRB_NRTX(wrb));
 
               /* Return the write buffer to the free list */
 
diff --git a/net/tcp/tcp_send_unbuffered.c b/net/tcp/tcp_send_unbuffered.c
index 73dbd0691d59f1b2ef95d604d0c86abd1e9c58a5..5e6ebec47424e67993fb01d53378eb0a33f235bf 100644
--- a/net/tcp/tcp_send_unbuffered.c
+++ b/net/tcp/tcp_send_unbuffered.c
@@ -570,7 +570,7 @@ static uint16_t tcpsend_interrupt(FAR struct net_driver_s *dev,
     {
       /* Yes.. report the timeout */
 
-      nllerr("SEND timeout\n");
+      nllerr("ERROR: SEND timeout\n");
       pstate->snd_sent = -ETIMEDOUT;
       goto end_wait;
     }
diff --git a/net/udp/udp_input.c b/net/udp/udp_input.c
index e1f1b19c5c950be8642a7f18cabf4b20e1022727..2c380a4028a947eccaeab4f7508812ff5bdc6133 100644
--- a/net/udp/udp_input.c
+++ b/net/udp/udp_input.c
@@ -149,7 +149,7 @@ static int udp_input(FAR struct net_driver_s *dev, unsigned int iplen)
       g_netstats.udp.drop++;
       g_netstats.udp.chkerr++;
 #endif
-      nllerr("Bad UDP checksum\n");
+      nllerr("ERROR: Bad UDP checksum\n");
       dev->d_len = 0;
     }
   else
@@ -207,7 +207,7 @@ static int udp_input(FAR struct net_driver_s *dev, unsigned int iplen)
         }
       else
         {
-          nllerr("No listener on UDP port\n");
+          nllerr("ERROR: No listener on UDP port\n");
           dev->d_len = 0;
         }
     }