1 files changed, 34 insertions, 0 deletions
diff --git a/smoketest/scripts/cli/test_protocols_static_arp.py b/smoketest/scripts/cli/test_protocols_static_arp.py
index f89cdacbb..47b04a48a 100755
--- a/smoketest/scripts/cli/test_protocols_static_arp.py
+++ b/smoketest/scripts/cli/test_protocols_static_arp.py
@@ -86,5 +86,39 @@ class TestARP(VyOSUnitTestSHIM.TestCase):
                 print(entry)
             self.assertTrue(found)
 
+    def test_static_arp_deletion(self):
+        # deleting the "protocols static arp" node must remove the
+        # previously installed PERMANENT ARP entry from the kernel
+        host = '192.0.2.10'
+        mac = '00:01:02:03:04:0a'
+
+        def get_static_arp_entry():
+            # Return our static (PERMANENT) neighbour, matched by dst + dev.
+            arp_table = json.loads(cmdl(['ip', '-j', '-4', 'neigh', 'show']))
+            for entry in arp_table:
+                if (
+                    entry['dst'] == host
+                    and entry['dev'] == interface
+                    and 'PERMANENT' in entry.get('state', [])
+                ):
+                    return entry
+            return None
+
+        self.cli_set(base_path + ['interface', interface, 'address', host, 'mac', mac])
+        self.cli_commit()
+
+        # the static PERMANENT entry must be present with all configured fields
+        entry = get_static_arp_entry()
+        self.assertIsNotNone(entry)
+        self.assertEqual(entry['dst'], host)
+        self.assertEqual(entry['lladdr'], mac)
+        self.assertEqual(entry['dev'], interface)
+
+        # delete the whole node and verify the static entry is gone
+        self.cli_delete(base_path)
+        self.cli_commit()
+
+        self.assertIsNone(get_static_arp_entry())
+
 if __name__ == '__main__':
     unittest.main(verbosity=2, failfast=VyOSUnitTestSHIM.TestCase.debug_on())