diff --git a/proto/snmp/snmp_test.c b/proto/snmp/snmp_test.c
index 2a54d6cf..bb24c262 100644
--- a/proto/snmp/snmp_test.c
+++ b/proto/snmp/snmp_test.c
@@ -8,6 +8,7 @@
  */
 
 #include "test/birdtest.h"
+#include "test/bt-utils.h"
 
 #include "bgp_mib.h"
 #include "subagent.h"
@@ -60,11 +61,14 @@ test_oid(struct oid *oid, uint base_size)
 
   bt_debug("testing BGP4-MIB::bgpPeerEntry\n");
   oid->n_subid = base_size + 4;
+  bt_debug("arith\n");
   oid->ids[2] = 3;
   oid->ids[3] = 1;   // BGP4-MIB::bgpPeerEntry
-  snmp_oid_dump(oid);
-  SNMP_EXPECTED(snmp_bgp_state(oid), BGP_INTERNAL_PEER_ENTRY);
+  bt_debug("dumpping\n");
+  bt_debug("after dump, assertion\n");
+  // SNMP_EXPECTED(snmp_bgp_state(oid), BGP_INTERNAL_PEER_ENTRY);
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_PEER_ENTRY);
+  bt_debug("finish\n");
 
   oid->n_subid = base_size + 5;
   oid->ids[2] = 3;
@@ -77,69 +81,74 @@ test_oid(struct oid *oid, uint base_size)
 
   oid->ids[4] = 3;    // BGP4-MIB::bgpPeerAdminStatus
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_ADMIN_STATUS);
-  
+
+  bt_debug("     1/4\n");
   oid->ids[4] = 4;    // BGP4-MIB::bgpPeerNegotiatedVersion
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_NEGOTIATED_VERSION);
-  
+
   oid->ids[4] = 5;    // BGP4-MIB::bgpPeerLocalAddr
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_LOCAL_ADDR);
-  
+
   oid->ids[4] = 6;    // BGP4-MIB::bgpPeerLocalPort
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_LOCAL_PORT);
-  
+
   oid->ids[4] = 7;    // BGP4-MIB::bgpPeerRemoteAddr
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_REMOTE_ADDR);
-  
+
   oid->ids[4] = 8;    // BGP4-MIB::bgpPeerRemotePort
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_REMOTE_PORT);
-  
+
   oid->ids[4] = 9;    // BGP4-MIB::bgpPeerRemoteAs
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_REMOTE_AS);
-  
+
   oid->ids[4] = 10;   // BGP4-MIB::bgpPeerInUpdates
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_RX_UPDATES);
-  
+
+  bt_debug("   1/2 \n");
   oid->ids[4] = 11;   // BGP4-MIB::bgpPeerOutUpdates
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_TX_UPDATES);
-  
+
   oid->ids[4] = 12;   // BGP4-MIB::bgpPeerInTotalMessages
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_RX_MESSAGES);
-  
+
   oid->ids[4] = 13;   // BGP4-MIB::bgpPeerOutTotalMessages
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_TX_MESSAGES);
-  
+
   oid->ids[4] = 14;   // BGP4-MIB::bgpPeerLastError
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_LAST_ERROR);
-  
+
   oid->ids[4] = 15;   // BGP4-MIB::bgpPeerFsmEstablishedTransitions
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_FSM_TRANSITIONS);
-  
+
   oid->ids[4] = 16;   // BGP4-MIB::bgpPeerFsmEstablishedTime
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_FSM_ESTABLISHED_TIME);
-  
+
   oid->ids[4] = 17;   // BGP4-MIB::bgpPeerConnectionRetryInterval
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_RETRY_INTERVAL);
-  
+  bt_debug( "     3/4\n");
+
   oid->ids[4] = 18;   // BGP4-MIB::bgpPeerHoldTime
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_HOLD_TIME);
-  
+
   oid->ids[4] = 19;   // BGP4-MIB::bgpPeerKeepAlive
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_KEEPALIVE);
-  
+
   oid->ids[4] = 20;   // BGP4-MIB::bgpPeerHoldTimeConfigured
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_HOLD_TIME_CONFIGURED);
-  
+
   oid->ids[4] = 21;   // BGP4-MIB::bgpPeerKeepAliveConfigured
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_KEEPALIVE_CONFIGURED);
-  
+
   oid->ids[4] = 22;   // BGP4-MIB::bgpPeerMinASOriginationInterval
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_ORIGINATION_INTERVAL);
-  
+
   oid->ids[4] = 23;   // BGP4-MIB::bgpPeerMinRouteAdvertisementInverval
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT);
 
   oid->ids[4] = 24;   // BGP4-MIB::bgpPeerInUpdateElapsedTime
   bt_assert(snmp_bgp_state(oid) == BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME);
+
+  bt_debug("testing BGP4-MIB::bgpPeerEntry end\n");
 }
 
 static int
@@ -214,7 +223,7 @@ t_s_prefixize(void)
     bt_debug("null oid is empty");
   else
     bt_debug("null oid is not empty");
-  
+
   bt_debug("main cause\n");
   struct oid *tmp = snmp_prefixize(&snmp_proto, nulled, BYTE_ORD);
   bt_debug("after snmp_prefixize() call\n");
@@ -232,21 +241,30 @@ t_s_prefixize(void)
   prefixed->include = 1;
 
   u32 prefixed_arr[] = { ~((u32) 0), 0, 256 };
-  memcpy(&prefixed->ids, prefixed_arr, sizeof(prefixed_arr) /
-    sizeof(prefixed_arr[0]));
+  memcpy(&prefixed->ids, prefixed_arr, sizeof(prefixed_arr));
 
-    bt_assert(memcmp(snmp_prefixize(&snmp_proto, prefixed, BYTE_ORD), prefixed, snmp_oid_size(prefixed)) == 0);
+  struct oid *copy = mb_alloc(&root_pool, snmp_oid_size(prefixed));
+  memcpy(copy, prefixed, snmp_oid_size(prefixed));
+
+  struct oid *result = snmp_prefixize(&snmp_proto, copy, BYTE_ORD);
+  bt_assert(memcmp(result, prefixed, snmp_oid_size(prefixed)) == 0);
+  //bt_assert(memcmp(snmp_prefixize(&snmp_proto, copy, BYTE_ORD), prefixed, snmp_oid_size(prefixed)) == 0);
+
+  mb_free(copy);
 
   struct oid *to_prefix = mb_alloc(&root_pool, sizeof(struct oid) + 8 * sizeof(u32));
   to_prefix->n_subid = 8;
   to_prefix->prefix = 0;
   to_prefix->include = 1;
 
-  u32 to_prefix_arr[] = {1, 3, 6, 1, 100, ~((u32) 0), 0, 256 };
-  memcpy(&to_prefix->n_subid, to_prefix_arr, sizeof(to_prefix_arr) /
-    sizeof(to_prefix_arr[0]));
 
-  bt_assert(memcmp(snmp_prefixize(&snmp_proto, to_prefix, BYTE_ORD), prefixed, snmp_oid_size(prefixed)) == 0);
+  u32 to_prefix_arr[] = {1, 3, 6, 1, 100, ~((u32) 0), 0, 256 };
+  memcpy(to_prefix->ids, to_prefix_arr, sizeof(to_prefix_arr));
+
+  struct oid *temp = snmp_prefixize(&snmp_proto, to_prefix, BYTE_ORD);
+
+  //bt_assert(memcmp(snmp_prefixize(&snmp_proto, to_prefix, BYTE_ORD), prefixed, snmp_oid_size(prefixed)) == 0);
+  bt_assert(memcmp(temp, prefixed, snmp_oid_size(prefixed)) == 0);
 
   struct oid *unprefixable = mb_alloc(&root_pool, sizeof(struct oid) + 2 * sizeof(u32));
   unprefixable->n_subid = 2;
@@ -304,10 +322,21 @@ t_oid_compare(void)
   bt_assert(snmp_oid_compare(l1, l1) ==  0);
   bt_assert(snmp_oid_compare(r1, r1) ==  0);
 
+  /* different prefix -- has higher priority */
+  l1->prefix = 8;
+  r1->prefix = 4;
+
+  bt_assert(snmp_oid_compare(l1, r1) ==  1);
+  bt_assert(snmp_oid_compare(r1, l1) == -1);
+
+  bt_assert(snmp_oid_compare(l1, l1) ==  0);
+  bt_assert(snmp_oid_compare(r1, r1) ==  0);
+
   mb_free(l1);
   mb_free(r1);
 
 
+
   /* different length, no prefix */
   l1 = OID_ALLOCATE(4);
   {
@@ -318,7 +347,7 @@ t_oid_compare(void)
   r1 = OID_ALLOCATE(5);
   {
     u32 arr[] = { 1, 2, 3, 4, 1 };
-    OID_INIT(l1, 5, 0, 1, arr);
+    OID_INIT(r1, 5, 0, 1, arr);
   }
 
   bt_assert(snmp_oid_compare(l1, r1) == -1);
@@ -337,11 +366,22 @@ t_oid_compare(void)
   bt_assert(snmp_oid_compare(l1, l1) ==  0);
   bt_assert(snmp_oid_compare(r1, r1) ==  0);
 
+  /* different prefix -- has higher priority */
+  l1->prefix = 17;
+  r1->prefix = 14;
+
+  bt_assert(snmp_oid_compare(l1, r1) ==  1);
+  bt_assert(snmp_oid_compare(r1, l1) == -1);
+
+  bt_assert(snmp_oid_compare(l1, l1) ==  0);
+  bt_assert(snmp_oid_compare(r1, r1) ==  0);
+
   mb_free(l1);
   mb_free(r1);
 
 
-  /* inverse order different length, no prefix */  
+
+  /* inverse order different length, no prefix */
   l1 = OID_ALLOCATE(4);
   {
     u32 arr[] = { 1, 2, 3, 5 };
@@ -370,10 +410,18 @@ t_oid_compare(void)
   bt_assert(snmp_oid_compare(l1, l1) ==  0);
   bt_assert(snmp_oid_compare(r1, r1) ==  0);
 
+  /* different prefix -- has higher priority */
+  l1->prefix = 127;
+  r1->prefix = 35;
+
+  bt_assert(snmp_oid_compare(l1, r1) ==  1);
+  bt_assert(snmp_oid_compare(r1, l1) == -1);
+
   mb_free(l1);
   mb_free(r1);
 
 
+
 /* ==== MIXED PREFIXED / NON PREFIXED OID compare ==== */
   /* same length, mixed */
   l1 = OID_ALLOCATE(6);  /* OID .1.2.17.3.21.4 */
@@ -385,7 +433,7 @@ t_oid_compare(void)
   r1 = OID_ALLOCATE(1);  /* OID .1.3.6.1.5.3 */
   {
     u32 arr[] = { 3 };
-    OID_INIT(l1, 1, 5, 1, arr);
+    OID_INIT(r1, 1, 5, 1, arr);
   }
 
   bt_assert(snmp_oid_compare(l1, r1) == -1);
@@ -447,6 +495,8 @@ int main(int argc, char **argv)
 {
   bt_init(argc, argv);
 
+  bt_bird_init();
+
   bt_test_suite(t_s_bgp_state, "Function snmp_bgp_state()");
 
   bt_test_suite(t_s_is_oid_empty, "Function snmp_is_oid_empty()");
diff --git a/proto/snmp/subagent.c b/proto/snmp/subagent.c
index 5510ecc3..bfc339d3 100644
--- a/proto/snmp/subagent.c
+++ b/proto/snmp/subagent.c
@@ -276,8 +276,8 @@ refresh_ids(struct snmp_proto *p, struct agentx_header *h)
  * @size: number of packet bytes in buffer
  * retval number of byte parsed
  *
- * Function parse_ptk() parses Response-PDU and calls do_response().
- * Returns number of bytes parsed by function excluding size of header.
+ * function parse_ptk() parses response-pdu and calls do_response().
+ * returns number of bytes parsed by function excluding size of header.
  */
 static uint
 parse_pkt(struct snmp_proto *p, byte *pkt, uint size)
@@ -357,14 +357,15 @@ parse_pkt(struct snmp_proto *p, byte *pkt, uint size)
   // logical error: need to return number of actually parsed bytes, not what was
   // announced in the packet
   return parsed_len;
-  #if 0
+
+#if 0
   /* whole buffer was parsed while generating response */
   if (len == size)
     return pkt_size;
     return 1; /* meaning buffer is empty */
   else
     return 0; /* meaning buffer stil contain some data to be parsed, parsing is not finished */
-  #endif
+#endif
 }
 
 static uint
@@ -390,9 +391,9 @@ parse_response(struct snmp_proto *p, byte *res, uint size)
   }
 
   snmp_log("  endianity: %s, session %u, transaction: %u", (h->flags & AGENTX_NETWORK_BYTE_ORDER) ? "big end":
-"little end", h->session_id, h->transaction_id);
+	   "little end", h->session_id, h->transaction_id);
   snmp_log("  sid: %3u\ttid: %3u\tpid: %3u", p->session_id, p->transaction_id,
-p->packet_id);
+	   p->packet_id);
 
   snmp_log("  pkt size %u", h->payload);
   // snmp_log("uptime: %u s", r->uptime);
@@ -401,8 +402,7 @@ p->packet_id);
     do_response(p, res, size);
   else
     /* erronous packet should be dropped quietly */
-    snmp_log("an error occured '%s'", snmp_errs[get_u16(&r->err) -
-SNMP_ERR_SHIFT]);
+    snmp_log("an error occured '%s'", snmp_errs[get_u16(&r->err) - SNMP_ERR_SHIFT]);
 
   return pkt_size + sizeof(struct agentx_header);
 }
@@ -696,7 +696,7 @@ static uint parse_gets_pdu(struct snmp_proto *p, byte *req, uint size)
     {
       snmp_log("too big o_start or o_end");
       snmp_log("o_start_b packet: %u  o_end_b packet: %u   packet size: %u",
-snmp_oid_size(o_start_b), snmp_oid_size(o_end_b), size);
+      snmp_oid_size(o_start_b), snmp_oid_size(o_end_b), size);
       err = -1;  /* parse error too big n_subid (greater than message) */
       continue;
     }
@@ -1003,11 +1003,16 @@ has_inet_prefix(struct oid *o)
 static int
 upper_bound_check(struct oid *found, struct oid *bound)
 {
+  snmp_log("upper_bound_check(*f, *b) %p %p is_empty() %d", found, bound,
+	  snmp_is_oid_empty(bound));
+
+  // TODO manage NULL in found & bound
+
   if (snmp_is_oid_empty(bound))
     return 1;
 
   if (snmp_oid_compare(found, bound) < 0)
-    return 0;
+    return 1;
 
   return 0;
 }
@@ -1051,7 +1056,7 @@ search_mib_unchecked(struct snmp_proto *p, struct oid *o_start, struct oid *o_en
 	 */
 
       default:
-        return NULL;
+	return NULL;
     }
   }
 
@@ -1095,36 +1100,43 @@ find_ospf_record(struct snmp_proto *p, struct oid *o, byte *buf, uint size)
 struct oid *
 snmp_prefixize(struct snmp_proto *proto, struct oid *oid, int byte_ord)
 {
+  snmp_log("snmp_prefixize()");
   const u32 prefix[] = {1, 3, 6, 1};
 
   if (oid == NULL)
-    return NULL;
+  { snmp_log("NULL"); return NULL; }
 
   if (snmp_is_oid_empty(oid))
   {
     /* allocate new zeroed oid */
+    snmp_log("blank");
     return snmp_oid_blank(proto);
   }
-  else if (LOAD(oid->n_subid, byte_ord) != 0)
-  {
-    struct oid *new = mb_allocz(proto->p.pool, snmp_oid_size(oid));
+
+  /* already in prefixed form */
+  else if (oid->prefix != 0) {
+    struct oid *new = mb_alloc(proto->p.pool, snmp_oid_size(oid));
     memcpy(new, oid, snmp_oid_size(oid));
+    snmp_log("already prefixed");
     return new;
   }
 
   if (oid->n_subid < 5)
-    return NULL;
+  {  snmp_log("too small"); return NULL; }
 
   for (int i = 0; i < 4; i++)
     if (LOAD(oid->ids[i], byte_ord) != prefix[i])
-      return NULL;
+      { snmp_log("different prefix"); return NULL; }
 
-  /* validity chech here */
+  /* validity check here */
   if (oid->ids[4] >= 256)
-    return NULL;
+    { snmp_log("outside byte first id"); return NULL; }
 
   struct oid *new = mb_alloc(proto->p.pool,
           sizeof(struct oid) + MAX((oid->n_subid - 5) * sizeof(u32), 0));
+  snmp_log(" new %p new->ids %p &new->ids %p   oid %p oid->ids %p oid->ids[5] %p"
+"&oid->ids[5] %p &(oid->ids[5]) %p", new, new->ids, &new->ids, oid, oid->ids,
+oid->ids[5], &oid->ids[5], &(oid->ids[5]));
 
   memcpy(new, oid, sizeof(struct oid));
   new->n_subid = oid->n_subid - 5;