diff --git a/northd/ovn-northd.8.xml b/northd/ovn-northd.8.xml
index 407464602..21ae0ca60 100644
--- a/northd/ovn-northd.8.xml
+++ b/northd/ovn-northd.8.xml
@@ -1072,8 +1072,10 @@ output;
           <code>localport</code> ports) that are down (unless <code>
           ignore_lsp_down</code> is configured as true in <code>options</code>
           column of <code>NB_Global</code> table of the <code>Northbound</code>
-          database), for logical ports of type <code>virtual</code> and for
-          logical ports with 'unknown' address set.
+          database), for logical ports of type <code>virtual</code>, for
+          logical ports with 'unknown' address set and for logical ports of
+          a logical switch configured with
+          <code>other_config:vlan-passthru=true</code>.
         </p>
       </li>
 
diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c
index 3dae7bb1c..17bcede5a 100644
--- a/northd/ovn-northd.c
+++ b/northd/ovn-northd.c
@@ -7007,6 +7007,10 @@ build_lswitch_arp_nd_responder_known_ips(struct ovn_port *op,
                 return;
             }
 
+            if (is_vlan_transparent(op->od)) {
+                return;
+            }
+
             for (size_t i = 0; i < op->n_lsp_addrs; i++) {
                 for (size_t j = 0; j < op->lsp_addrs[i].n_ipv4_addrs; j++) {
                     ds_clear(match);
diff --git a/northd/ovn_northd.dl b/northd/ovn_northd.dl
index 3afa80a3b..a09aea6ee 100644
--- a/northd/ovn_northd.dl
+++ b/northd/ovn_northd.dl
@@ -3309,7 +3309,8 @@ for (CheckLspIsUp[check_lsp_is_up]) {
             ((lsp_is_up(lsp) or not check_lsp_is_up)
              or lsp.__type == "router" or lsp.__type == "localport") and
             lsp.__type != "external" and lsp.__type != "virtual" and
-            not lsp.addresses.contains("unknown"))
+            not lsp.addresses.contains("unknown") and
+            not sw.is_vlan_transparent)
     {
         var __match = "arp.tpa == ${addr.addr} && arp.op == 1" in
         {
@@ -3359,7 +3360,8 @@ for (SwitchPortIPv6Address(.port = &SwitchPort{.lsp = lsp, .json_name = json_nam
                            .ea = ea, .addr = addr)
      if lsp.is_enabled() and
         (lsp_is_up(lsp) or lsp.__type == "router" or lsp.__type == "localport") and
-        lsp.__type != "external" and lsp.__type != "virtual")
+        lsp.__type != "external" and lsp.__type != "virtual" and
+        not sw.is_vlan_transparent)
 {
     var __match = "nd_ns && ip6.dst == {${addr.addr}, ${addr.solicited_node()}} && nd.target == ${addr.addr}" in
     var actions = "${if (lsp.__type == \"router\") \"nd_na_router\" else \"nd_na\"} { "
diff --git a/tests/ovn.at b/tests/ovn.at
index b6523c328..811a05c5a 100644
--- a/tests/ovn.at
+++ b/tests/ovn.at
@@ -3169,6 +3169,118 @@ OVN_CLEANUP([hv-1],[hv-2])
 AT_CLEANUP
 ])
 
+OVN_FOR_EACH_NORTHD([
+AT_SETUP([ovn -- VLAN transparency, passthru=true, ARP responder disabled])
+ovn_start
+
+net_add net
+check ovs-vsctl add-br br-phys
+ovn_attach net br-phys 192.168.0.1
+
+check ovn-nbctl ls-add ls
+check ovn-nbctl --wait=sb add Logical-Switch ls other_config vlan-passthru=true
+
+for i in 1 2; do
+    check ovn-nbctl lsp-add ls lsp$i
+    check ovn-nbctl lsp-set-addresses lsp$i "f0:00:00:00:00:0$i 10.0.0.$i"
+done
+
+for i in 1 2; do
+    check ovs-vsctl add-port br-int vif$i -- set Interface vif$i external-ids:iface-id=lsp$i \
+                                  options:tx_pcap=vif$i-tx.pcap \
+                                  options:rxq_pcap=vif$i-rx.pcap \
+                                  ofport-request=$i
+done
+
+wait_for_ports_up
+
+ovn-sbctl dump-flows ls > lsflows
+AT_CAPTURE_FILE([lsflows])
+
+AT_CHECK([grep -w "ls_in_arp_rsp" lsflows | sort], [0], [dnl
+  table=16(ls_in_arp_rsp      ), priority=0    , match=(1), action=(next;)
+])
+
+test_arp() {
+    local inport=$1 outport=$2 sha=$3 spa=$4 tpa=$5 reply_ha=$6
+    tag=8100fefe
+    local request=ffffffffffff${sha}${tag}08060001080006040001${sha}${spa}ffffffffffff${tpa}
+    ovs-appctl netdev-dummy/receive vif$inport $request
+    echo $request >> $outport.expected
+
+    local reply=${sha}${reply_ha}${tag}08060001080006040002${reply_ha}${tpa}${sha}${spa}
+    ovs-appctl netdev-dummy/receive vif$outport $reply
+    echo $reply >> $inport.expected
+}
+
+test_arp 1 2 f00000000001 0a000001 0a000002 f00000000002
+test_arp 2 1 f00000000002 0a000002 0a000001 f00000000001
+
+for i in 1 2; do
+    OVN_CHECK_PACKETS([vif$i-tx.pcap], [$i.expected])
+done
+
+AT_CLEANUP
+])
+
+OVN_FOR_EACH_NORTHD([
+AT_SETUP([ovn -- VLAN transparency, passthru=true, ND/NA responder disabled])
+ovn_start
+
+net_add net
+check ovs-vsctl add-br br-phys
+ovn_attach net br-phys 192.168.0.1
+
+check ovn-nbctl ls-add ls
+check ovn-nbctl --wait=sb add Logical-Switch ls other_config vlan-passthru=true
+
+for i in 1 2; do
+    check ovn-nbctl lsp-add ls lsp$i
+    check ovn-nbctl lsp-set-addresses lsp$i "f0:00:00:00:00:0$i fe00::$i"
+done
+
+for i in 1 2; do
+    check ovs-vsctl add-port br-int vif$i -- set Interface vif$i external-ids:iface-id=lsp$i \
+                                  options:tx_pcap=vif$i-tx.pcap \
+                                  options:rxq_pcap=vif$i-rx.pcap \
+                                  ofport-request=$i
+done
+
+wait_for_ports_up
+
+ovn-sbctl dump-flows ls > lsflows
+AT_CAPTURE_FILE([lsflows])
+
+AT_CHECK([grep -w "ls_in_arp_rsp" lsflows | sort], [0], [dnl
+  table=16(ls_in_arp_rsp      ), priority=0    , match=(1), action=(next;)
+])
+
+test_nd_na() {
+    local inport=$1 outport=$2 sha=$3 spa=$4 tpa=$5 reply_ha=$6
+    tag=8100fefe
+    icmp_type=87
+    local request=ffffffffffff${sha}${tag}86dd6000000000183aff${spa}ff0200000000000000000001ff${tpa: -6}${icmp_type}007ea100000000${tpa}
+    ovs-appctl netdev-dummy/receive vif$inport $request
+    echo $request >> $outport.expected
+    echo $request
+
+    icmp_type=88
+    local reply=${sha}${reply_ha}${tag}86dd6000000000183aff${tpa}${spa}${icmp_type}003da540000000${tpa}
+    ovs-appctl netdev-dummy/receive vif$outport $reply
+    echo $reply >> $inport.expected
+    echo $reply
+}
+
+test_nd_na 1 2 f00000000001 fe000000000000000000000000000001 fe000000000000000000000000000002 f00000000002
+test_nd_na 2 1 f00000000002 fe000000000000000000000000000002 fe000000000000000000000000000001 f00000000001
+
+for i in 1 2; do
+    OVN_CHECK_PACKETS([vif$i-tx.pcap], [$i.expected])
+done
+
+AT_CLEANUP
+])
+
 OVN_FOR_EACH_NORTHD([
 AT_SETUP([ovn -- VLAN transparency, passthru=true, multiple hosts])
 ovn_start
