diff --git a/ansible/vars/topo_cable-test.yml b/ansible/vars/topo_cable-test.yml
index a662d0f3c62..d0e6d74a779 100644
--- a/ansible/vars/topo_cable-test.yml
+++ b/ansible/vars/topo_cable-test.yml
@@ -93,10 +93,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1::34/128
-        - FC00:1::35/128
+        - FC00:1::34/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-120.yml b/ansible/vars/topo_dualtor-120.yml
index be86f04425e..66a8c2f109a 100644
--- a/ansible/vars/topo_dualtor-120.yml
+++ b/ansible/vars/topo_dualtor-120.yml
@@ -210,10 +210,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-56.yml b/ansible/vars/topo_dualtor-56.yml
index 133566457f1..ba9751a037f 100644
--- a/ansible/vars/topo_dualtor-56.yml
+++ b/ansible/vars/topo_dualtor-56.yml
@@ -114,10 +114,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-64-breakout.yml b/ansible/vars/topo_dualtor-64-breakout.yml
index 18208b1c991..690e6b5ff46 100644
--- a/ansible/vars/topo_dualtor-64-breakout.yml
+++ b/ansible/vars/topo_dualtor-64-breakout.yml
@@ -115,10 +115,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-64.yml b/ansible/vars/topo_dualtor-64.yml
index fb4ab5179fc..9fa83b3d01d 100644
--- a/ansible/vars/topo_dualtor-64.yml
+++ b/ansible/vars/topo_dualtor-64.yml
@@ -118,10 +118,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-aa-120.yml b/ansible/vars/topo_dualtor-aa-120.yml
index 4b735ca1514..06befc59e52 100644
--- a/ansible/vars/topo_dualtor-aa-120.yml
+++ b/ansible/vars/topo_dualtor-aa-120.yml
@@ -267,10 +267,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-aa-56.yml b/ansible/vars/topo_dualtor-aa-56.yml
index 8110aa58082..39e1e687802 100644
--- a/ansible/vars/topo_dualtor-aa-56.yml
+++ b/ansible/vars/topo_dualtor-aa-56.yml
@@ -139,10 +139,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-aa-64-breakout.yml b/ansible/vars/topo_dualtor-aa-64-breakout.yml
index 8531215b335..e6ee547bb50 100644
--- a/ansible/vars/topo_dualtor-aa-64-breakout.yml
+++ b/ansible/vars/topo_dualtor-aa-64-breakout.yml
@@ -139,10 +139,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-aa-64.yml b/ansible/vars/topo_dualtor-aa-64.yml
index 52ea2acf139..3ed6ab3e32b 100644
--- a/ansible/vars/topo_dualtor-aa-64.yml
+++ b/ansible/vars/topo_dualtor-aa-64.yml
@@ -155,10 +155,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-aa.yml b/ansible/vars/topo_dualtor-aa.yml
index fbe7842bea6..fe5819e4412 100644
--- a/ansible/vars/topo_dualtor-aa.yml
+++ b/ansible/vars/topo_dualtor-aa.yml
@@ -91,10 +91,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-mixed-120.yml b/ansible/vars/topo_dualtor-mixed-120.yml
index c836d833cc6..0ba3c5ce330 100644
--- a/ansible/vars/topo_dualtor-mixed-120.yml
+++ b/ansible/vars/topo_dualtor-mixed-120.yml
@@ -239,10 +239,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-mixed-56.yml b/ansible/vars/topo_dualtor-mixed-56.yml
index 7fdf022f0bc..78ced817439 100644
--- a/ansible/vars/topo_dualtor-mixed-56.yml
+++ b/ansible/vars/topo_dualtor-mixed-56.yml
@@ -127,10 +127,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor-mixed.yml b/ansible/vars/topo_dualtor-mixed.yml
index d042cf8bb91..bddf6096e97 100644
--- a/ansible/vars/topo_dualtor-mixed.yml
+++ b/ansible/vars/topo_dualtor-mixed.yml
@@ -79,10 +79,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/ansible/vars/topo_dualtor.yml b/ansible/vars/topo_dualtor.yml
index 6c70a8ed4b4..4ed284cdeb5 100644
--- a/ansible/vars/topo_dualtor.yml
+++ b/ansible/vars/topo_dualtor.yml
@@ -66,10 +66,10 @@ topology:
     loopback1:
       ipv4:
         - 10.1.0.34/32
-        - 10.1.0.35/32
+        - 10.1.0.34/32
       ipv6:
         - FC00:1:0:34::/128
-        - FC00:1:0:35::/128
+        - FC00:1:0:34::/128
     loopback2:
       ipv4:
         - 10.1.0.36/32
diff --git a/tests/cacl/test_cacl_application.py b/tests/cacl/test_cacl_application.py
index 2db372f24c0..22e396c2a5e 100644
--- a/tests/cacl/test_cacl_application.py
+++ b/tests/cacl/test_cacl_application.py
@@ -579,6 +579,8 @@ def generate_expected_rules(duthost, tbinfo, docker_network, asic_index, expecte
         rules_to_expect_for_dualtor = [
                                        "-A INPUT -p udp -m udp --dport 67 -j DHCP",
                                        "-A DHCP -j RETURN",
+                                       "-I INPUT 1 -d 10.1.0.34 -p tcp --dport 179 -j DROP",
+                                       " ip6tables -I INPUT 1 -d fc00:1:0:34:: -p tcp --dport 179 -j DROP",
                                        "-N DHCP"
                                       ]
         iptables_rules.extend(rules_to_expect_for_dualtor)