ip: fix interface ip address del sw_if_index check

Type: fix

Signed-off-by: Ye donggang <yedg@wangsu.com>
Change-Id: Ia9f72ff2be455ecd4ff3d16e884c5a50f9df69fe
(cherry picked from commit dbd366b239c0506b0d9984e7481967e038f10a23)

1 files changed, 18 insertions, 0 deletions

diff --git a/test/test_ip6.py b/test/test_ip6.py
index 87346c2964f..f8a2dc24e42 100644
--- a/test/test_ip6.py
+++ b/test/test_ip6.py
@@ -1125,6 +1125,24 @@ class TestIPv6IfAddrRoute(VppTestCase):
         self.assertFalse(find_route(self, addr1, 128))
         self.assertFalse(find_route(self, addr2, 128))
 
+    def test_ipv6_ifaddr_del(self):
+        """ Delete an interface address that does not exist """
+
+        loopbacks = self.create_loopback_interfaces(1)
+        lo = self.lo_interfaces[0]
+
+        lo.config_ip6()
+        lo.admin_up()
+
+        #
+        # try and remove pg0's subnet from lo
+        #
+        with self.vapi.assert_negative_api_retval():
+            self.vapi.sw_interface_add_del_address(
+                sw_if_index=lo.sw_if_index,
+                prefix=self.pg0.local_ip6_prefix,
+                is_add=0)
+
 
 class TestICMPv6Echo(VppTestCase):
     """ ICMPv6 Echo Test Case """