diff --git a/tests/bgp/conftest.py b/tests/bgp/conftest.py
index afc4ce7e7f7..802ffa46b1a 100644
--- a/tests/bgp/conftest.py
+++ b/tests/bgp/conftest.py
@@ -238,7 +238,11 @@ def _setup_interfaces_dualtor(mg_facts, peer_count):
                     {
                         "local_intf": loopback_intf["name"],
                         "local_addr": "%s/%s" % (loopback_intf_addr, loopback_intf_prefixlen),
-                        "neighbor_intf": "eth%s" % mg_facts["minigraph_port_indices"][local_interface],
+                        # Note: Config same subnets on PTF will generate two connect routes on PTF.
+                        # This may lead different IPs has same FDB entry on DUT even they are on different
+                        # interface and cause layer3 packet drop on PTF, so here same interface for different
+                        # neighbor.
+                        "neighbor_intf": "eth%s" % mg_facts["minigraph_port_indices"][local_interfaces[0]],
                         "neighbor_addr": "%s/%s" % (mux_configs[local_interface]["server_ipv4"].split("/")[0],
                                                     vlan_intf_prefixlen)
                     }
@@ -252,8 +256,7 @@ def _setup_interfaces_dualtor(mg_facts, peer_count):
 
             first_neighbor_port = None
             for conn in connections:
-                ptfhost.shell("ifconfig %s %s" % (conn["neighbor_intf"],
-                                                  conn["neighbor_addr"]))
+                ptfhost.shell("ip address add %s dev %s" % (conn["neighbor_addr"], conn["neighbor_intf"]))
                 if not first_neighbor_port:
                     first_neighbor_port = conn["neighbor_intf"]
                 # NOTE: this enables the standby ToR to passively learn