diff -urNp old/agent/mibgroup/ip-mib/data_access/ipaddress_common.c new/agent/mibgroup/ip-mib/data_access/ipaddress_common.c

--- old/agent/mibgroup/ip-mib/data_access/ipaddress_common.c	2017-04-26 08:46:40.272404217 +0200

+++ new/agent/mibgroup/ip-mib/data_access/ipaddress_common.c	2017-04-26 08:50:30.681323779 +0200

@@ -144,6 +144,7 @@ _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);