diff --git a/ansible/roles/test/tasks/copp.yml b/ansible/roles/test/tasks/copp.yml
index 48c8ed436ca..356da5aac42 100644
--- a/ansible/roles/test/tasks/copp.yml
+++ b/ansible/roles/test/tasks/copp.yml
@@ -20,14 +20,14 @@
       script: roles/test/files/helpers/add_ip.sh
       delegate_to: "{{ ptf_host }}"
 
-    - name: set default nn_target_port if it's not defined
-      set_fact: nn_target_port="3"
-      when: nn_target_port is undefined
-
     - name: set default nn_target_interface if it's not defined
-      set_fact: nn_target_interface="Ethernet12"
+      set_fact: nn_target_interface="{{ minigraph_ports.keys()[3] }}"
       when: nn_target_interface is undefined
 
+    - name: set default nn_target_port if it's not defined
+      set_fact: nn_target_port="{{ minigraph_port_indices[nn_target_interface] }}"
+      when: nn_target_port is undefined
+
     - name: Update ptf_nn_agent configuration inside ptf
       template: src=ptf_nn_agent.conf.ptf.j2 dest=/etc/supervisor/conf.d/ptf_nn_agent.conf
       delegate_to: "{{ ptf_host }}"
@@ -115,3 +115,4 @@
       with_items:
         - lldpd
         - lldp-syncd
+