diff --git a/configs/noc/noc-a6300-sw1.cfg b/configs/noc/noc-a6300-sw1.cfg
index 9c6354c..84965aa 100644
--- a/configs/noc/noc-a6300-sw1.cfg
+++ b/configs/noc/noc-a6300-sw1.cfg
@@ -70,6 +70,11 @@ vsf member 3
     type jl659a
     link 1 3/1/49
     link 2 3/1/50
+access-list ip hvac
+    10 permit tcp 10.1.230.12 10.1.230.11
+    20 permit icmp 10.1.230.12 10.1.230.11 log count
+    30 permit tcp 10.1.230.12 10.1.40.108
+    40 permit icmp 10.1.230.12 10.1.40.108 log count
 dhcpv4-snooping
 client track ip 
 vlan 1
@@ -1455,6 +1460,7 @@ interface 2/1/2
     spanning-tree root-guard
     spanning-tree tcn-guard
     loop-protect
+    apply access-list ip hvac in
     port-access onboarding-method concurrent enable
     client track ip enable
     client track ip update-interval 120