diff --git a/ansible/roles/vm_set/tasks/add_topo.yml b/ansible/roles/vm_set/tasks/add_topo.yml
index 292ca5cff4b..d80577c8999 100644
--- a/ansible/roles/vm_set/tasks/add_topo.yml
+++ b/ansible/roles/vm_set/tasks/add_topo.yml
@@ -43,3 +43,7 @@
     fp_mtu: "{{ fp_mtu_size }}"
     max_fp_num: "{{ max_fp_num }}"
   become: yes
+
+- name: Send arp ping packet to gw for flusing the ARP table
+  command: docker exec -i ptf_{{ vm_set_name }} python -c "from scapy.all import *; arping('{{ mgmt_gw }}')"
+  become: yes