diff --git a/src/sonic_ax_impl/mibs/vendor/cisco/bgp4.py b/src/sonic_ax_impl/mibs/vendor/cisco/bgp4.py
index 87214707b..46dd68bf3 100644
--- a/src/sonic_ax_impl/mibs/vendor/cisco/bgp4.py
+++ b/src/sonic_ax_impl/mibs/vendor/cisco/bgp4.py
@@ -39,7 +39,13 @@ def update_data(self):
             neigh_info = self.db_conn[db_index].get_all(mibs.STATE_DB, neigh_key, blocking=False)
             if neigh_info:
                 state = neigh_info['state']
-                ip = ipaddress.ip_address(neigh_str)
+                try:
+                    ip = ipaddress.ip_address(neigh_str)
+                except ValueError:
+                    # In case of unnumbered BGP, the neighbor is an interface.
+                    # That can't be represented here, so just skip the neighbor.
+                    continue
+
                 if type(ip) is ipaddress.IPv4Address:
                     oid_head = (1, 4)
                 else:
diff --git a/tests/mock_tables/state_db.json b/tests/mock_tables/state_db.json
index abccdb386..76b6c4365 100644
--- a/tests/mock_tables/state_db.json
+++ b/tests/mock_tables/state_db.json
@@ -195,5 +195,11 @@
     },
   "NEIGH_STATE_TABLE|fc00::12": {
     "state" : "Deleted"
+    },
+  "NEIGH_STATE_TABLE|Ethernet2": {
+    "state" : "Idle"
+    },
+  "NEIGH_STATE_TABLE|PortChannel04": {
+    "state" : "Established"
     }
 }