diff --git a/scripts/ipintutil b/scripts/ipintutil
index 5535bce7e7..85879972e0 100755
--- a/scripts/ipintutil
+++ b/scripts/ipintutil
@@ -29,6 +29,7 @@ try:
             mock_tables.dbconnector.load_namespace_config()
         else:
             import mock_tables.mock_single_asic
+            mock_tables.mock_single_asic.add_unknown_intf=True
 except KeyError:
     pass
 
@@ -150,7 +151,10 @@ def get_ip_intfs_in_namespace(af, namespace, display):
         ip_intf_attr = []
         if namespace != constants.DEFAULT_NAMESPACE and skip_ip_intf_display(iface, display):
             continue
-        ipaddresses = multi_asic_util.multi_asic_get_ip_intf_addr_from_ns(namespace, iface)
+        try:
+            ipaddresses = multi_asic_util.multi_asic_get_ip_intf_addr_from_ns(namespace, iface)
+        except ValueError:
+            continue
         if af in ipaddresses:
             ifaddresses = []
             bgp_neighs = {}
diff --git a/tests/mock_tables/mock_single_asic.py b/tests/mock_tables/mock_single_asic.py
index 08c2157c9d..ac97c4bc79 100644
--- a/tests/mock_tables/mock_single_asic.py
+++ b/tests/mock_tables/mock_single_asic.py
@@ -4,6 +4,8 @@
 from sonic_py_common import multi_asic
 from utilities_common import multi_asic as multi_asic_util
 
+add_unknown_intf=False
+
 mock_intf_table = {
     '': {
         'eth0': {
@@ -60,6 +62,8 @@ def mock_single_asic_get_ip_intf_from_ns(namespace):
     interfaces = []
     try:
         interfaces = list(mock_intf_table[namespace].keys())
+        if add_unknown_intf:
+            interfaces.append("unknownintf")
     except KeyError:
         pass
     return interfaces
@@ -70,7 +74,8 @@ def mock_single_asic_get_ip_intf_addr_from_ns(namespace, iface):
     try:
         ipaddresses = mock_intf_table[namespace][iface]
     except KeyError:
-        pass
+        if add_unknown_intf:
+            raise ValueError("Unknow interface")
     return ipaddresses