diff -urNp a/agent/mibgroup/ip-mib/data_access/ipaddress_common.c b/agent/mibgroup/ip-mib/data_access/ipaddress_common.c

--- a/agent/mibgroup/ip-mib/data_access/ipaddress_common.c	2020-06-10 13:27:03.213904398 +0200

+++ b/agent/mibgroup/ip-mib/data_access/ipaddress_common.c	2020-06-10 13:28:41.025863050 +0200

@@ -121,6 +121,7 @@ _remove_duplicates(netsnmp_container *co

 	for (entry = ITERATOR_FIRST(it); entry; entry = ITERATOR_NEXT(it)) {

 		if (prev_entry && _access_ipaddress_entry_compare_addr(prev_entry, entry) == 0) {

 			/* 'entry' is duplicate of the previous one -> delete it */

+            NETSNMP_LOGONCE((LOG_ERR, "Duplicate IPv4 address detected, some interfaces may not be visible in IP-MIB\n"));

 			netsnmp_access_ipaddress_entry_free(entry);

 		} else {

 			CONTAINER_INSERT(ret, entry);