diff -u zabbix-2.0.4-dist/src/libs/zbxsysinfo/freebsd/freebsd.c zabbix-2.0.4/src/libs/zbxsysinfo/freebsd/freebsd.c
--- zabbix-2.0.4-dist/src/libs/zbxsysinfo/freebsd/freebsd.c     2012-12-08 12:09:15.000000000 +0100
+++ zabbix-2.0.4/src/libs/zbxsysinfo/freebsd/freebsd.c  2013-01-13 11:55:12.933547507 +0100
@@ -40,6 +40,7 @@
        {"net.if.out",          CF_USEUPARAM,   NET_IF_OUT,             0,      "lo0,bytes"},
        {"net.if.total",        CF_USEUPARAM,   NET_IF_TOTAL,           0,      "lo0,bytes"},
        {"net.if.collisions",   CF_USEUPARAM,   NET_IF_COLLISIONS,      0,      "lo0"},
+       {"net.if.discovery",    0,              NET_IF_DISCOVERY,       NULL,   NULL},
 
        {"vm.memory.size",      CF_USEUPARAM,   VM_MEMORY_SIZE,         0,      "free"},
 
diff -u zabbix-2.0.4-dist/src/libs/zbxsysinfo/freebsd/net.c zabbix-2.0.4/src/libs/zbxsysinfo/freebsd/net.c
--- zabbix-2.0.4-dist/src/libs/zbxsysinfo/freebsd/net.c 2012-12-08 12:09:15.000000000 +0100
+++ zabbix-2.0.4/src/libs/zbxsysinfo/freebsd/net.c      2013-01-13 11:54:49.954800782 +0100
@@ -20,6 +20,7 @@
 #include "common.h"
 #include "sysinfo.h"
 #include "../common/common.h"
+#include "zbxjson.h"
 
 static struct ifmibdata        ifmd;
 
@@ -216,3 +217,37 @@
 
        return SYSINFO_RET_OK;
 }
+
+int     NET_IF_DISCOVERY(const char *cmd, const char *param, unsigned flags, AGENT_RESULT *result)
+{
+        int             ret = SYSINFO_RET_FAIL;
+        struct zbx_json j;
+        struct if_nameindex *interfaces;
+        int            i;
+
+        zbx_json_init(&j, ZBX_JSON_STAT_BUF_LEN);
+
+        zbx_json_addarray(&j, ZBX_PROTO_TAG_DATA);
+
+        if ((interfaces=if_nameindex())!=NULL) {
+               i=0;
+
+               while (interfaces[i].if_index!=0) {
+                       zbx_json_addobject(&j, NULL);
+                       zbx_json_addstring(&j, "{#IFNAME}", interfaces[i].if_name, ZBX_JSON_TYPE_STRING);
+                       zbx_json_close(&j);
+                       i++;
+                }
+
+                ret = SYSINFO_RET_OK;
+        }
+
+        zbx_json_close(&j);
+
+        SET_STR_RESULT(result, strdup(j.buffer));
+
+        zbx_json_free(&j);
+
+        return ret;
+}
+