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diff --git a/tests/sys/net/if_bridge_test.sh b/tests/sys/net/if_bridge_test.sh
--- a/tests/sys/net/if_bridge_test.sh
+++ b/tests/sys/net/if_bridge_test.sh
@@ -597,6 +597,73 @@
vnet_cleanup
}
+atf_test_case "vlan" "cleanup"
+vlan_head()
+{
+ atf_set descr 'Ensure the bridge takes vlan ID into account, PR#270559'
+ atf_set require.user root
+}
+
+vlan_body()
+{
+ vnet_init
+
+ vid=1
+
+ epaira=$(vnet_mkepair)
+ epairb=$(vnet_mkepair)
+
+ br=$(vnet_mkbridge)
+
+ vnet_mkjail one ${epaira}b
+ vnet_mkjail two ${epairb}b
+
+ ifconfig ${br} up
+ ifconfig ${epaira}a up
+ ifconfig ${epairb}a up
+ ifconfig ${br} addm ${epaira}a addm ${epairb}a
+
+ jexec one ifconfig ${epaira}b up
+ jexec one ifconfig ${epaira}b.${vid} create
+
+ jexec two ifconfig ${epairb}b up
+ jexec two ifconfig ${epairb}b.${vid} create
+
+ # Create a MAC address conflict between an untagged and tagged interface
+ jexec two ifconfig ${epairb}b.${vid} ether 02:05:6e:06:28:1a
+ jexec one ifconfig ${epaira}b ether 02:05:6e:06:28:1a
+ jexec one ifconfig ${epaira}b.${vid} ether 02:05:6e:06:28:1b
+
+ # Add ip address, will also populate $br's fowarding table, by ARP announcement
+ jexec one ifconfig ${epaira}b.${vid} 192.0.2.1/24 up
+ jexec two ifconfig ${epairb}b.${vid} 192.0.2.2/24 up
+
+ sleep 0.5
+
+ ifconfig ${br}
+ jexec one ifconfig
+ jexec two ifconfig
+ ifconfig ${br} addr
+
+ atf_check -s exit:0 -o ignore \
+ jexec one ping -c 1 -t 1 192.0.2.2
+
+ # This will trigger a mac flap (by ARP announcement)
+ jexec one ifconfig ${epaira}b 192.0.2.1/24 up
+
+ sleep 0.5
+
+ ifconfig ${br} addr
+
+ atf_check -s exit:0 -o ignore \
+ jexec one ping -c 1 -t 1 192.0.2.2
+}
+
+vlan_cleanup()
+{
+ vnet_cleanup
+}
+
atf_init_test_cases()
{
atf_add_test_case "bridge_transmit_ipv4_unicast"
@@ -610,4 +677,5 @@
atf_add_test_case "stp_validation"
atf_add_test_case "gif"
atf_add_test_case "mtu"
+ atf_add_test_case "vlan"
}

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