[intfsorch] Enable ipv6 proxy ndp along with proxy arp (sonic-net#3045)

* [intfsorch] Enable ipv6 proxy ndp along with proxy arp setting SAI_VLAN_ATTR_UNKNOWN_MULTICAST_FLOOD_CONTROL_TYPE to SAI_VLAN_FLOOD_CONTROL_TYPE_NONE when proxy arp is enabled. This fixes a bug where ipv6 NS packets were flooding ports with duplicate packets. We now set multicast flood type to none.
mssonicbld · Feb 28, 2024 · 8d6aac0 · 8d6aac0
1 parent 5d91f10
commit 8d6aac0
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diff --git a/orchagent/intfsorch.cpp b/orchagent/intfsorch.cpp
@@ -368,6 +368,21 @@ bool IntfsOrch::setIntfVlanFloodType(const Port &port, sai_vlan_flood_control_ty
         }
     }
 
+    // Also set ipv6 multicast flood type
+    attr.id = SAI_VLAN_ATTR_UNKNOWN_MULTICAST_FLOOD_CONTROL_TYPE;
+    attr.value.s32 = vlan_flood_type;
+
+    status = sai_vlan_api->set_vlan_attribute(port.m_vlan_info.vlan_oid, &attr);
+    if (status != SAI_STATUS_SUCCESS)
+    {
+        SWSS_LOG_ERROR("Failed to set multicast flood type for VLAN %u, rv:%d", port.m_vlan_info.vlan_id, status);
+        task_process_status handle_status = handleSaiSetStatus(SAI_API_VLAN, status);
+        if (handle_status != task_success)
+        {
+            return parseHandleSaiStatusFailure(handle_status);
+        }
+    }
+
     return true;
 }
 

diff --git a/tests/test_vnet.py b/tests/test_vnet.py
@@ -779,6 +779,9 @@ def check_router_interface(self, dvs, intf_name, name, vlan_oid=0):
             expected_attr = { 'SAI_VLAN_ATTR_BROADCAST_FLOOD_CONTROL_TYPE': 'SAI_VLAN_FLOOD_CONTROL_TYPE_NONE' }
             check_object(asic_db, self.ASIC_VLAN_TABLE, vlan_oid, expected_attr)
 
+            expected_attr = { 'SAI_VLAN_ATTR_UNKNOWN_MULTICAST_FLOOD_CONTROL_TYPE': 'SAI_VLAN_FLOOD_CONTROL_TYPE_NONE' }
+            check_object(asic_db, self.ASIC_VLAN_TABLE, vlan_oid, expected_attr)
+
         check_linux_intf_arp_proxy(dvs, intf_name)
 
         self.rifs.add(new_rif)