diff --git a/controller/ofctrl.c b/controller/ofctrl.c
index f14cd79a8..a10b0f567 100644
--- a/controller/ofctrl.c
+++ b/controller/ofctrl.c
@@ -388,9 +388,24 @@ struct meter_band_entry {
 
 static struct shash meter_bands;
 
+static struct hmap ecmp_nexthop_map;
+struct ecmp_nexthop_entry {
+    struct hmap_node node;
+    bool erase;
+
+    char *nexthop;
+    int id;
+};
+
 static void ofctrl_meter_bands_destroy(void);
 static void ofctrl_meter_bands_clear(void);
 
+static void ecmp_nexthop_monitor_destroy(void);
+static void ecmp_nexthop_monitor_run(
+        const struct sbrec_ecmp_nexthop_table *enh_table,
+        struct ovs_list *msgs);
+
+
 /* MFF_* field ID for our Geneve option.  In S_TLV_TABLE_MOD_SENT, this is
  * the option we requested (we don't know whether we obtained it yet).  In
  * S_CLEAR_FLOWS or S_UPDATE_FLOWS, this is really the option we have. */
@@ -429,6 +444,7 @@ ofctrl_init(struct ovn_extend_table *group_table,
     groups = group_table;
     meters = meter_table;
     shash_init(&meter_bands);
+    hmap_init(&ecmp_nexthop_map);
 }
 
 /* S_NEW, for a new connection.
@@ -883,6 +899,7 @@ ofctrl_destroy(void)
     expr_symtab_destroy(&symtab);
     shash_destroy(&symtab);
     ofctrl_meter_bands_destroy();
+    ecmp_nexthop_monitor_destroy();
 }
 
 uint64_t
@@ -2306,6 +2323,87 @@ add_meter(struct ovn_extend_table_info *m_desired,
     ofctrl_meter_bands_alloc(sb_meter, m_desired, msgs);
 }
 
+static void
+ecmp_nexthop_monitor_free_entry(struct ecmp_nexthop_entry *e,
+                                struct ovs_list *msgs)
+{
+    if (msgs) {
+        ovs_u128 mask = {
+            /* ct_labels.label BITS[96-127] */
+            .u64.hi = 0xffffffff00000000,
+        };
+        uint64_t id = e->id;
+        ovs_u128 nexthop = {
+            .u64.hi = id << 32,
+        };
+        struct ofp_ct_match match = {
+            .labels = nexthop,
+            .labels_mask = mask,
+        };
+        struct ofpbuf *msg = ofp_ct_match_encode(&match, NULL,
+                                                 rconn_get_version(swconn));
+        ovs_list_push_back(msgs, &msg->list_node);
+    }
+    free(e->nexthop);
+    free(e);
+}
+
+static void
+ecmp_nexthop_monitor_destroy(void)
+{
+    struct ecmp_nexthop_entry *e;
+    HMAP_FOR_EACH_POP (e, node, &ecmp_nexthop_map) {
+        ecmp_nexthop_monitor_free_entry(e, NULL);
+    }
+    hmap_destroy(&ecmp_nexthop_map);
+}
+
+static struct ecmp_nexthop_entry *
+ecmp_nexthop_monitor_lookup(char *nexthop)
+{
+    uint32_t hash = hash_string(nexthop, 0);
+    struct ecmp_nexthop_entry *e;
+
+    HMAP_FOR_EACH_WITH_HASH (e, node, hash, &ecmp_nexthop_map) {
+        if (!strcmp(e->nexthop, nexthop)) {
+            return e;
+        }
+    }
+    return NULL;
+}
+
+static void
+ecmp_nexthop_monitor_run(const struct sbrec_ecmp_nexthop_table *enh_table,
+                         struct ovs_list *msgs)
+{
+    struct ecmp_nexthop_entry *e;
+    HMAP_FOR_EACH (e, node, &ecmp_nexthop_map) {
+        e->erase = true;
+    }
+
+    const struct sbrec_ecmp_nexthop *sbrec_ecmp_nexthop;
+    SBREC_ECMP_NEXTHOP_TABLE_FOR_EACH (sbrec_ecmp_nexthop, enh_table) {
+        e = ecmp_nexthop_monitor_lookup(sbrec_ecmp_nexthop->nexthop);
+        if (!e) {
+            e = xzalloc(sizeof *e);
+            e->nexthop = xstrdup(sbrec_ecmp_nexthop->nexthop);
+            e->id = sbrec_ecmp_nexthop->id;
+            uint32_t hash = hash_string(e->nexthop, 0);
+            hmap_insert(&ecmp_nexthop_map, &e->node, hash);
+        } else {
+            e->erase = false;
+        }
+    }
+
+    HMAP_FOR_EACH_SAFE (e, node, &ecmp_nexthop_map) {
+        if (e->erase) {
+            hmap_remove(&ecmp_nexthop_map, &e->node);
+            ecmp_nexthop_monitor_free_entry(e, msgs);
+        }
+    }
+
+}
+
 static void
 installed_flow_add(struct ovn_flow *d,
                    struct ofputil_bundle_ctrl_msg *bc,
@@ -2664,6 +2762,7 @@ ofctrl_put(struct ovn_desired_flow_table *lflow_table,
            struct shash *pending_ct_zones,
            struct hmap *pending_lb_tuples,
            struct ovsdb_idl_index *sbrec_meter_by_name,
+           const struct sbrec_ecmp_nexthop_table *enh_table,
            uint64_t req_cfg,
            bool lflows_changed,
            bool pflows_changed)
@@ -2704,6 +2803,8 @@ ofctrl_put(struct ovn_desired_flow_table *lflow_table,
     /* OpenFlow messages to send to the switch to bring it up-to-date. */
     struct ovs_list msgs = OVS_LIST_INITIALIZER(&msgs);
 
+    ecmp_nexthop_monitor_run(enh_table, &msgs);
+
     /* Iterate through ct zones that need to be flushed. */
     struct shash_node *iter;
     SHASH_FOR_EACH(iter, pending_ct_zones) {
diff --git a/controller/ofctrl.h b/controller/ofctrl.h
index 502c73da6..e08b354f4 100644
--- a/controller/ofctrl.h
+++ b/controller/ofctrl.h
@@ -31,6 +31,7 @@ struct ofpbuf;
 struct ovsrec_bridge;
 struct ovsrec_open_vswitch_table;
 struct sbrec_meter_table;
+struct sbrec_ecmp_nexthop_table;
 struct shash;
 
 struct ovn_desired_flow_table {
@@ -59,6 +60,7 @@ void ofctrl_put(struct ovn_desired_flow_table *lflow_table,
                 struct shash *pending_ct_zones,
                 struct hmap *pending_lb_tuples,
                 struct ovsdb_idl_index *sbrec_meter_by_name,
+                const struct sbrec_ecmp_nexthop_table *enh_table,
                 uint64_t nb_cfg,
                 bool lflow_changed,
                 bool pflow_changed);
diff --git a/controller/ovn-controller.c b/controller/ovn-controller.c
index 1c9960c70..28cac2683 100644
--- a/controller/ovn-controller.c
+++ b/controller/ovn-controller.c
@@ -5945,6 +5945,8 @@ main(int argc, char *argv[])
                                    &ct_zones_data->pending,
                                    &lb_data->removed_tuples,
                                    sbrec_meter_by_name,
+                                   sbrec_ecmp_nexthop_table_get(
+                                        ovnsb_idl_loop.idl),
                                    ofctrl_seqno_get_req_cfg(),
                                    engine_node_changed(&en_lflow_output),
                                    engine_node_changed(&en_pflow_output));
diff --git a/tests/system-ovn-kmod.at b/tests/system-ovn-kmod.at
index 14fe4ecec..88c196874 100644
--- a/tests/system-ovn-kmod.at
+++ b/tests/system-ovn-kmod.at
@@ -1054,3 +1054,269 @@ OVS_TRAFFIC_VSWITCHD_STOP(["
 "])
 AT_CLEANUP
 ])
+
+OVN_FOR_EACH_NORTHD([
+AT_SETUP([ECMP symmetric reply - kmod])
+AT_KEYWORDS([ecmp])
+
+CHECK_CONNTRACK()
+ovn_start
+
+OVS_TRAFFIC_VSWITCHD_START()
+ADD_BR([br-int])
+
+# Set external-ids in br-int needed for ovn-controller
+ovs-vsctl \
+        -- set Open_vSwitch . external-ids:system-id=hv1 \
+        -- set Open_vSwitch . external-ids:ovn-remote=unix:$ovs_base/ovn-sb/ovn-sb.sock \
+        -- set Open_vSwitch . external-ids:ovn-encap-type=geneve \
+        -- set Open_vSwitch . external-ids:ovn-encap-ip=169.0.0.1 \
+        -- set bridge br-int fail-mode=secure other-config:disable-in-band=true
+
+# Start ovn-controller
+start_daemon ovn-controller
+
+# Logical network:
+# Alice is connected to gateway router R1. R1 is connected to two "external"
+# routers, R2 and R3 via an "ext" switch.
+# Bob is connected to both R2 and R3. R1 contains two ECMP routes, one through R2
+# and one through R3, to Bob.
+#
+#     alice -- R1 -- ext ---- R2
+#                     |         \
+#                     |           bob
+#                     |         /
+#                     + ----- R3
+#
+# For this test, Bob sends request traffic through R2 to Alice. We want to ensure that
+# all response traffic from Alice is routed through R2 as well.
+
+ovn-nbctl create Logical_Router name=R1 options:chassis=hv1
+ovn-nbctl create Logical_Router name=R2
+ovn-nbctl create Logical_Router name=R3
+
+ovn-nbctl ls-add alice
+ovn-nbctl ls-add bob
+ovn-nbctl ls-add ext
+
+# connect alice to R1
+ovn-nbctl lrp-add R1 alice 00:00:01:01:02:03 10.0.0.1/24 fd01::1/64
+ovn-nbctl lsp-add alice rp-alice -- set Logical_Switch_Port rp-alice \
+    type=router options:router-port=alice addresses='"00:00:01:01:02:03"'
+
+# connect bob to R2
+ovn-nbctl lrp-add R2 R2_bob 00:00:02:01:02:03 172.16.0.2/16 fd07::2/64
+ovn-nbctl lsp-add bob rp2-bob -- set Logical_Switch_Port rp2-bob \
+    type=router options:router-port=R2_bob addresses='"00:00:02:01:02:03"'
+
+# connect bob to R3
+ovn-nbctl lrp-add R3 R3_bob 00:00:02:01:02:04 172.16.0.3/16 fd07::3/64
+ovn-nbctl lsp-add bob rp3-bob -- set Logical_Switch_Port rp3-bob \
+    type=router options:router-port=R3_bob addresses='"00:00:02:01:02:04"'
+
+# Connect R1 to ext
+ovn-nbctl lrp-add R1 R1_ext 00:00:04:01:02:03 20.0.0.1/24 fd02::1/64
+ovn-nbctl lsp-add ext r1-ext -- set Logical_Switch_Port r1-ext \
+    type=router options:router-port=R1_ext addresses='"00:00:04:01:02:03"'
+
+# Connect R2 to ext
+ovn-nbctl lrp-add R2 R2_ext 00:00:04:01:02:04 20.0.0.2/24 fd02::2/64
+ovn-nbctl lsp-add ext r2-ext -- set Logical_Switch_Port r2-ext \
+    type=router options:router-port=R2_ext addresses='"00:00:04:01:02:04"'
+
+# Connect R3 to ext
+ovn-nbctl lrp-add R3 R3_ext 00:00:04:01:02:05 20.0.0.3/24 fd02::3/64
+ovn-nbctl lsp-add ext r3-ext -- set Logical_Switch_Port r3-ext \
+    type=router options:router-port=R3_ext addresses='"00:00:04:01:02:05"'
+
+# Install ECMP routes for alice.
+ovn-nbctl --ecmp-symmetric-reply --policy="src-ip" lr-route-add R1 10.0.0.0/24 20.0.0.2
+ovn-nbctl --ecmp-symmetric-reply --policy="src-ip" lr-route-add R1 10.0.0.0/24 20.0.0.3
+
+# Static Routes
+ovn-nbctl lr-route-add R2 10.0.0.0/24 20.0.0.1
+ovn-nbctl lr-route-add R3 10.0.0.0/24 20.0.0.1
+
+# Logical port 'alice1' in switch 'alice'.
+ADD_NAMESPACES(alice1)
+# Only send 1 router solicitation as any additional ones can cause datapath
+# flows to get evicted, causing unexpected failures below.
+NS_CHECK_EXEC([alice1], [sysctl -w net.ipv6.conf.default.router_solicitations=1], [0], [dnl
+net.ipv6.conf.default.router_solicitations = 1
+])
+ADD_VETH(alice1, alice1, br-int, "10.0.0.2/24", "f0:00:00:01:02:04", \
+         "10.0.0.1")
+NS_CHECK_EXEC([alice1], [ip -6 addr add fd01::2/64 dev alice1 nodad])
+NS_CHECK_EXEC([alice1], [ip -6 route add default via fd01::1])
+NS_CHECK_EXEC([alice1], [ip -6 neigh add fd01::1 lladdr 00:00:01:01:02:03 dev alice1], [0])
+ovn-nbctl lsp-add alice alice1 \
+-- lsp-set-addresses alice1 "f0:00:00:01:02:04 10.0.0.2 fd01::2"
+
+# Logical port 'bob1' in switch 'bob'.
+ADD_NAMESPACES(bob1)
+# Only send 1 router solicitation as any additional ones can cause datapath
+# flows to get evicted, causing unexpected failures below.
+NS_CHECK_EXEC([bob1], [sysctl -w net.ipv6.conf.default.router_solicitations=1], [0], [dnl
+net.ipv6.conf.default.router_solicitations = 1
+])
+ADD_VETH(bob1, bob1, br-int, "172.16.0.1/16", "f0:00:00:01:02:06", \
+         "172.16.0.2")
+NS_CHECK_EXEC([bob1], [ip -6 addr add fd07::1/64 dev bob1 nodad])
+NS_CHECK_EXEC([bob1], [ip -6 route add default via fd07::2])
+NS_CHECK_EXEC([bob1], [ip -6 neigh add fd07::2 lladdr 00:00:02:01:02:03 dev bob1])
+NS_CHECK_EXEC([bob1], [ip -6 neigh add fd07::3 lladdr 00:00:01:01:02:04 dev bob1])
+
+# Add neighbour MAC addresses to avoid sending IPv6 NS messages which could
+# cause datapath flows to be evicted
+ovn-nbctl lsp-add bob bob1 \
+-- lsp-set-addresses bob1 "f0:00:00:01:02:06 172.16.0.1 fd07::1"
+
+# Ensure ovn-controller is caught up
+ovn-nbctl --wait=hv sync
+
+on_exit 'ovs-ofctl dump-flows br-int'
+
+NETNS_DAEMONIZE([alice1], [nc -l -k 80], [alice1.pid])
+NS_CHECK_EXEC([bob1], [nc -z 10.0.0.2 80], [0])
+NS_CHECK_EXEC([bob1], [ping -q -c 3 -i 0.3 -w 2 10.0.0.2 | FORMAT_PING], \
+[0], [dnl
+3 packets transmitted, 3 received, 0% packet loss, time 0ms
+])
+
+# Ensure conntrack entry is present. We should not try to predict
+# the tunnel key for the output port, so we strip it from the labels
+# and just ensure that the known ethernet address is present.
+AT_CHECK([ovs-appctl dpctl/dump-conntrack | FORMAT_CT(172.16.0.1) | \
+sed -e 's/zone=[[0-9]]*/zone=<cleared>/' |
+sed -e 's/mark=[[0-9]]*/mark=<cleared>/' |
+sed -e 's/labels=0x[[0-9]]/labels=0x?/'], [0], [dnl
+icmp,orig=(src=172.16.0.1,dst=10.0.0.2,id=<cleared>,type=8,code=0),reply=(src=10.0.0.2,dst=172.16.0.1,id=<cleared>,type=0,code=0),zone=<cleared>,mark=<cleared>,labels=0x?000000000401020400000000
+tcp,orig=(src=172.16.0.1,dst=10.0.0.2,sport=<cleared>,dport=<cleared>),reply=(src=10.0.0.2,dst=172.16.0.1,sport=<cleared>,dport=<cleared>),zone=<cleared>,mark=<cleared>,labels=0x?000000000401020400000000,protoinfo=(state=<cleared>)
+])
+
+# Ensure datapaths show conntrack states as expected
+# Like with conntrack entries, we shouldn't try to predict
+# port binding tunnel keys. So omit them from expected labels.
+AT_CHECK([ovs-appctl dpctl/dump-flows | sed -e 's/label=0x[[0-9]]/label=0x?/' | \
+grep 'ct_state(+new-est-rpl+trk).*ct(.*label=0x?000000000401020400000000/.*)' -c], [0], [dnl
+2
+])
+AT_CHECK([[ovs-appctl dpctl/dump-flows | sed -e 's/ct_label(0x[0-9]/ct_label(0x?/' | \
+grep 'ct_state(-new+est+rpl+trk).*ct_label(0x?000000000401020400000000)' -c]], [0], [dnl
+2
+])
+
+# Flush conntrack entries for easier output parsing of next test.
+AT_CHECK([ovs-appctl dpctl/flush-conntrack])
+# Change bob1 L2 address anche check the reply is properly updated.
+ovn-nbctl set Logical_Router_Port R2_ext mac='"00:00:10:01:02:04"'
+ovn-nbctl set Logical_Switch_Port r2-ext \
+     type=router options:router-port=R2_ext addresses='"00:00:10:01:02:04"'
+
+# Wait for ovn-controller before sending traffic
+ovn-nbctl --wait=hv sync
+
+NS_CHECK_EXEC([bob1], [nc -z 10.0.0.2 80], [0])
+NS_CHECK_EXEC([bob1], [ping -q -c 3 -i 0.3 -w 2 10.0.0.2 | FORMAT_PING], \
+[0], [dnl
+3 packets transmitted, 3 received, 0% packet loss, time 0ms
+])
+AT_CHECK([ovs-appctl dpctl/dump-flows | sed -e 's/label=0x[[0-9]]/label=0x?/' | \
+grep 'ct_state(+new-est-rpl+trk).*ct(.*label=0x?000000001001020400000000/.*)' -c], [0], [dnl
+2
+])
+AT_CHECK([[ovs-appctl dpctl/dump-flows | sed -e 's/ct_label(0x[0-9]/ct_label(0x?/' | \
+grep 'ct_state(-new+est+rpl+trk).*ct_label(0x?000000001001020400000000)' -c]], [0], [dnl
+2
+])
+
+AT_CHECK([ovs-appctl dpctl/dump-conntrack | grep 1001020400000000 | FORMAT_CT(172.16.0.1) | \
+sed -e 's/zone=[[0-9]]*/zone=<cleared>/' |
+sed -e 's/mark=[[0-9]]*/mark=<cleared>/' |
+sed -e 's/labels=0x[[0-9]]/labels=0x?/' | sort], [0], [dnl
+icmp,orig=(src=172.16.0.1,dst=10.0.0.2,id=<cleared>,type=8,code=0),reply=(src=10.0.0.2,dst=172.16.0.1,id=<cleared>,type=0,code=0),zone=<cleared>,mark=<cleared>,labels=0x?000000001001020400000000
+tcp,orig=(src=172.16.0.1,dst=10.0.0.2,sport=<cleared>,dport=<cleared>),reply=(src=10.0.0.2,dst=172.16.0.1,sport=<cleared>,dport=<cleared>),zone=<cleared>,mark=<cleared>,labels=0x?000000001001020400000000,protoinfo=(state=<cleared>)
+])
+# Check entries in table 76 and 77 expires w/o traffic
+OVS_WAIT_UNTIL([
+test $(ovs-ofctl dump-flows br-int | grep -c 'table=OFTABLE_ECMP_NH_MAC, n_packets') -eq 0
+])
+OVS_WAIT_UNTIL([
+test $(ovs-ofctl dump-flows br-int | grep -c 'table=OFTABLE_ECMP_NH, n_packets') -eq 0
+])
+
+# Flush connection tracking entries
+ovn-nbctl --wait=hv lr-route-del R1
+AT_CHECK([ovs-appctl dpctl/dump-conntrack | FORMAT_CT(172.16.0.1)])
+
+# Install ECMP routes for alice.
+ovn-nbctl --ecmp-symmetric-reply --policy="src-ip" lr-route-add R1 fd01::/126 fd02::2
+ovn-nbctl --ecmp-symmetric-reply --policy="src-ip" lr-route-add R1 fd01::/126 fd02::3
+
+# Static Routes
+ovn-nbctl lr-route-add R2 fd01::/64 fd02::1
+ovn-nbctl lr-route-add R3 fd01::/64 fd02::1
+
+NETNS_DAEMONIZE([alice1], [nc -6 -l -k 8080], [alice2.pid])
+NS_CHECK_EXEC([bob1], [nc -6 -z fd01::2 8080], [0])
+NS_CHECK_EXEC([bob1], [ping -q -c 3 -i 0.3 -w 2 fd01::2 | FORMAT_PING], \
+[0], [dnl
+3 packets transmitted, 3 received, 0% packet loss, time 0ms
+])
+
+# Ensure conntrack entry is present. We should not try to predict
+# the tunnel key for the output port, so we strip it from the labels
+# and just ensure that the known ethernet address is present.
+AT_CHECK([ovs-appctl dpctl/dump-conntrack | FORMAT_CT(fd01::2) | \
+sed -e 's/zone=[[0-9]]*/zone=<cleared>/' |
+sed -e 's/mark=[[0-9]]*/mark=<cleared>/' |
+sed -e 's/labels=0x[[0-9]]/labels=0x?/' | sort], [0], [dnl
+icmpv6,orig=(src=fd07::1,dst=fd01::2,id=<cleared>,type=128,code=0),reply=(src=fd01::2,dst=fd07::1,id=<cleared>,type=129,code=0),zone=<cleared>,mark=<cleared>,labels=0x?000000001001020400000000
+tcp,orig=(src=fd07::1,dst=fd01::2,sport=<cleared>,dport=<cleared>),reply=(src=fd01::2,dst=fd07::1,sport=<cleared>,dport=<cleared>),zone=<cleared>,mark=<cleared>,labels=0x?000000001001020400000000,protoinfo=(state=<cleared>)
+])
+
+# Flush conntrack entries for easier output parsing of next test.
+AT_CHECK([ovs-appctl dpctl/flush-conntrack])
+
+# Change bob1 L2 address anche check the reply is properly updated.
+ovn-nbctl set Logical_Router_Port R2_ext mac='"00:00:10:01:02:04"'
+ovn-nbctl --wait=hv set Logical_Switch_Port r2-ext \
+     type=router options:router-port=R2_ext addresses='"00:00:10:01:02:04"'
+
+NS_CHECK_EXEC([bob1], [nc -6 -z fd01::2 8080], [0])
+NS_CHECK_EXEC([bob1], [ping -q -c 3 -i 0.3 -w 2 fd01::2 | FORMAT_PING], \
+[0], [dnl
+3 packets transmitted, 3 received, 0% packet loss, time 0ms
+])
+
+AT_CHECK([ovs-appctl dpctl/dump-conntrack | grep 1001020400000000 | FORMAT_CT(fd01::2) | \
+sed -e 's/zone=[[0-9]]*/zone=<cleared>/' |
+sed -e 's/mark=[[0-9]]*/mark=<cleared>/' |
+sed -e 's/labels=0x[[0-9]]/labels=0x?/'], [0], [dnl
+icmpv6,orig=(src=fd07::1,dst=fd01::2,id=<cleared>,type=128,code=0),reply=(src=fd01::2,dst=fd07::1,id=<cleared>,type=129,code=0),zone=<cleared>,mark=<cleared>,labels=0x?000000001001020400000000
+tcp,orig=(src=fd07::1,dst=fd01::2,sport=<cleared>,dport=<cleared>),reply=(src=fd01::2,dst=fd07::1,sport=<cleared>,dport=<cleared>),zone=<cleared>,mark=<cleared>,labels=0x?000000001001020400000000,protoinfo=(state=<cleared>)
+])
+
+# Flush connection tracking entries
+ovn-nbctl --wait=hv lr-route-del R1
+AT_CHECK([ovs-appctl dpctl/dump-conntrack | FORMAT_CT(fd01::2)])
+
+ovs-ofctl dump-flows br-int
+
+OVS_APP_EXIT_AND_WAIT([ovn-controller])
+
+as ovn-sb
+OVS_APP_EXIT_AND_WAIT([ovsdb-server])
+
+as ovn-nb
+OVS_APP_EXIT_AND_WAIT([ovsdb-server])
+
+as northd
+OVS_APP_EXIT_AND_WAIT([ovn-northd])
+
+as
+OVS_TRAFFIC_VSWITCHD_STOP(["/failed to query port patch-.*/d
+/connection dropped.*/d"])
+
+AT_CLEANUP
+])
diff --git a/tests/system-ovn.at b/tests/system-ovn.at
index 7ae54113a..a0f375141 100644
--- a/tests/system-ovn.at
+++ b/tests/system-ovn.at
@@ -6178,6 +6178,10 @@ OVS_WAIT_UNTIL([
 test $(ovs-ofctl dump-flows br-int | grep -c 'table=OFTABLE_ECMP_NH, n_packets') -eq 0
 ])
 
+# Flush connection tracking entries
+ovn-nbctl --wait=hv lr-route-del R1
+AT_CHECK([ovs-appctl dpctl/dump-conntrack | FORMAT_CT(172.16.0.1)])
+
 ovs-ofctl dump-flows br-int
 
 OVS_APP_EXIT_AND_WAIT([ovn-controller])
