diff --git a/scripts/automation/trex_control_plane/interactive/trex/common/services/trex_service_IPv6ND.py b/scripts/automation/trex_control_plane/interactive/trex/common/services/trex_service_IPv6ND.py
index 8f6e8b618f..506b48122e 100644
--- a/scripts/automation/trex_control_plane/interactive/trex/common/services/trex_service_IPv6ND.py
+++ b/scripts/automation/trex_control_plane/interactive/trex/common/services/trex_service_IPv6ND.py
@@ -57,7 +57,7 @@ def lookup (self, pkt):
 
         # NA in response to our NS
         if ICMPv6ND_NA in scapy_pkt:
-            return self.services.get((scapy_pkt[IPv6].dst, scapy_pkt[IPv6].src, tuple(vlans)), [] ) 
+            return self.services.get((scapy_pkt[IPv6].dst, scapy_pkt[ICMPv6ND_NA].tgt, tuple(vlans)), [] )
 
         # NS from neighbor to verify ourselves
         if ICMPv6ND_NS in scapy_pkt: