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diff --git a/tests/sys/net/routing/Makefile b/tests/sys/net/routing/Makefile
--- a/tests/sys/net/routing/Makefile
+++ b/tests/sys/net/routing/Makefile
@@ -8,6 +8,7 @@
ATF_TESTS_C += test_rtsock_ops
ATF_TESTS_PYTEST += test_routing_l3.py
ATF_TESTS_PYTEST += test_rtsock_multipath.py
+ATF_TESTS_SH+= test_routing
${PACKAGE}FILES+= generic_cleanup.sh
${PACKAGE}FILESMODE_generic_cleanup.sh=0555
@@ -15,6 +16,8 @@
# Most of the tests operates on a common IPv4/IPv6 prefix,
# so running them in parallel will lead to weird results.
TEST_METADATA+= is_exclusive=true
+TEST_METADATA.test_routing+= execenv="jail" \
+ execenv_jail_params="vnet"
CFLAGS+= -I${.CURDIR:H:H:H}
diff --git a/tests/sys/net/routing/test_routing.sh b/tests/sys/net/routing/test_routing.sh
new file mode 100755
--- /dev/null
+++ b/tests/sys/net/routing/test_routing.sh
@@ -0,0 +1,231 @@
+#
+# Copyright (c) 2026 Pouria Mousavizadeh Tehrani <pouria@FreeBSD.org>
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+
+. $(atf_get_srcdir)/../../common/vnet.subr
+
+jq_rtentry()
+{
+ local route="$1"
+
+ jq -r '.statistics."route-information"."route-table"."rt-family".[]."rt-entry".[] |
+ select(.destination == "'${route}'")'
+}
+
+jq_nhop_filter()
+{
+ local nhop="$1"
+ local weight="$2"
+ local metric="$3"
+
+ jq -r 'select(.gateway == "'${nhop}'") |
+ select(.weight == '${weight}') |
+ select(.metric == '${metric}') |
+ .gateway'
+}
+
+
+atf_test_case "add_lowest_metric" "cleanup"
+add_lowest_metric_head()
+{
+ atf_set descr 'Create 4 routes to same dst and verify the lowest metric wins'
+ atf_set require.user root
+ atf_set require.progs jq
+}
+
+add_lowest_metric_body()
+{
+ local epair laddr route nhop1 nhop2 nhop3
+
+ laddr="3fff::1"
+ route="3fff:a::"
+ nhop1="3fff::1"
+ nhop2="3fff::2"
+ nhop3="3fff::3"
+
+ vnet_init
+ epair=$(vnet_mkepair)
+
+ atf_check -o ignore \
+ ifconfig ${epair}a inet6 ${laddr} up
+
+ # Create an ECMP route with metric 2
+ atf_check -o ignore \
+ route -6 add -net ${route}/64 -gateway ${nhop2} -weight 10 -metric 2
+ atf_check -o ignore \
+ route -6 add -net ${route}/64 -gateway ${nhop3} -weight 10 -metric 2
+
+ # Validate routes
+ atf_check -o save:netstat \
+ netstat -rn6 --libxo json
+ output=$(cat netstat | jq_rtentry ${route}/64 | jq_nhop_filter ${nhop2} 10 2)
+ atf_check_equal "$output" "$nhop2"
+ output=$(cat netstat | jq_rtentry ${route}/64 | jq_nhop_filter ${nhop3} 10 2)
+ atf_check_equal "$output" "$nhop3"
+
+ # Create a route with metric 3
+ atf_check -o ignore \
+ route -6 add -net ${route}/64 -gateway ${nhop1} -metric 3
+ # Verify that nhop1 is not the best route
+ atf_check -o not-match:".*gateway: ${nhop1}.*" \
+ route -n6 get -net ${route}/64
+
+ # Create a route to the same nhop with same metric 3 and verify it fails
+ atf_check -s exit:1 -o ignore -e match:".*exists.*" \
+ route -6 add -net ${route}/64 -gateway ${nhop1} -metric 3
+
+ # Create a route to an existing nhop with lower metric
+ atf_check -o ignore \
+ route -6 add -net ${route}/64 -gateway ${nhop1} -metric 1
+ # Verify that nhop1 is now the best route
+ atf_check -o match:".*gateway: ${nhop1}.*" \
+ route -n6 get -net ${route}/64
+}
+
+add_lowest_metric_cleanup()
+{
+ vnet_cleanup
+}
+
+atf_test_case "add_default_metric" "cleanup"
+add_default_metric_head()
+{
+ atf_set descr 'Create a route and verify the default metric is set'
+ atf_set require.user root
+ atf_set require.progs jq
+}
+
+add_default_metric_body()
+{
+ local epair laddr route nhop1
+
+ laddr="3fff::1"
+ route="3fff:a::"
+ nhop1="3fff::1"
+
+ vnet_init
+ epair=$(vnet_mkepair)
+
+ atf_check -o ignore \
+ ifconfig ${epair}a inet6 ${laddr} up
+
+ # Create a route without specifying its metric
+ atf_check -o ignore \
+ route -6 add -net ${route}/64 -gateway ${nhop1}
+
+ # Verify the route has the default metric of 1
+ atf_check -o save:netstat \
+ netstat -rn6 --libxo json
+ output=$(cat netstat | jq_rtentry ${route}/64 | jq_nhop_filter ${nhop1} 1 1)
+ atf_check_equal "$output" "$nhop1"
+}
+
+add_default_metric_cleanup()
+{
+ vnet_cleanup
+}
+
+atf_test_case "delete_route_with_metric" "cleanup"
+delete_route_with_metric_head()
+{
+ atf_set descr 'Create multiple routes to same dst and delete routes with specific metric'
+ atf_set require.user root
+ atf_set require.progs jq
+}
+
+delete_route_with_metric_body()
+{
+ local epair laddr route nhop1 nhop2
+
+ laddr="3fff::1"
+ route="3fff:a::"
+ nhop1="3fff::1"
+ nhop2="3fff::2"
+
+ vnet_init
+ epair=$(vnet_mkepair)
+
+ atf_check -o ignore \
+ ifconfig ${epair}a inet6 ${laddr} up
+
+ # Create two groups of ECMP routes with metric 2 and 3, and
+ # another route with metric 4.
+ atf_check -o ignore \
+ route -6 add -net ${route}/64 -gateway ${nhop1} -metric 3
+ atf_check -o ignore \
+ route -6 add -net ${route}/64 -gateway ${nhop1} -weight 10 -metric 2
+ atf_check -o ignore \
+ route -6 add -net ${route}/64 -gateway ${nhop2} -weight 10 -metric 2
+ atf_check -o ignore \
+ route -6 add -net ${route}/64 -gateway ${nhop2} -metric 3
+ atf_check -o ignore \
+ route -6 add -net ${route}/64 -gateway ${nhop2} -metric 4
+
+ # Validate we have 5 routes
+ atf_check -o save:netstat \
+ netstat -rn6 --libxo json
+ output=$(cat netstat | jq_rtentry ${route}/64 | jq_nhop_filter ${nhop1} 1 3)
+ atf_check_equal "$output" "$nhop1"
+ output=$(cat netstat | jq_rtentry ${route}/64 | jq_nhop_filter ${nhop1} 10 2)
+ atf_check_equal "$output" "$nhop1"
+ output=$(cat netstat | jq_rtentry ${route}/64 | jq_nhop_filter ${nhop2} 10 2)
+ atf_check_equal "$output" "$nhop2"
+ output=$(cat netstat | jq_rtentry ${route}/64 | jq_nhop_filter ${nhop2} 1 3)
+ atf_check_equal "$output" "$nhop2"
+ output=$(cat netstat | jq_rtentry ${route}/64 | jq_nhop_filter ${nhop2} 1 4)
+ atf_check_equal "$output" "$nhop2"
+
+ # Delete one of the nexthops of them best ECMP route
+ # Test that deleting a route by specifying gateway + metric works.
+ atf_check -o ignore \
+ route -n6 delete -net ${route}/64 -gateway ${nhop2} -metric 2
+
+ # Verify that nhop1 is the best route now
+ atf_check -o match:".*gateway: ${nhop1}.*" \
+ route -n6 get -net ${route}/64
+
+ # But other route with nhops2 should exists.
+ atf_check -o save:netstat \
+ netstat -rn6 --libxo json
+ output=$(cat netstat | jq_rtentry ${route}/64 | jq_nhop_filter ${nhop2} 1 3)
+ atf_check_equal "$output" "$nhop2"
+ output=$(cat netstat | jq_rtentry ${route}/64 | jq_nhop_filter ${nhop2} 1 4)
+ atf_check_equal "$output" "$nhop2"
+
+ # Delete routes with nhop1 as nexthop without specifying metric.
+ # Test that deleting a route by gateway removes all routes with
+ # that gateway, regardless of metric value.
+ atf_check -o ignore \
+ route -n6 delete -net ${route}/64 -gateway ${nhop1}
+
+ # Verify that nhop2 is the best route now
+ atf_check -o match:".*gateway: ${nhop2}.*" \
+ route -n6 get -net ${route}/64
+
+ # Delete routes with metric 3 without specifying their gateway.
+ # Test that deleting a route by metric removes all routes with
+ # that metric, regardless of gateway value.
+ atf_check -o ignore \
+ route -n6 delete -net ${route}/64 -metric 3
+
+ # Verify that nhop2 is still the best route with metric of 4
+ atf_check -o match:".*gateway: ${nhop2}.*" \
+ route -n6 get -net ${route}/64
+ output=$(cat netstat | jq_rtentry ${route}/64 | jq_nhop_filter ${nhop2} 1 4)
+ atf_check_equal "$output" "$nhop2"
+}
+
+delete_route_with_metric_cleanup()
+{
+ vnet_cleanup
+}
+
+
+atf_init_test_cases()
+{
+ atf_add_test_case "add_lowest_metric"
+ atf_add_test_case "add_default_metric"
+ atf_add_test_case "delete_route_with_metric"
+}

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