Create a topology with two hosts, each directly connected to a different
router. Both routers are connected using two links, enabling multipath
routing.
Test IPv4 and IPv6 ping using default MTU and large MTU.
Signed-off-by: Ido Schimmel <idosch@xxxxxxxxxxxx>
---
tools/testing/selftests/forwarding/Makefile | 2 +-
.../selftests/forwarding/router_multipath.sh | 215 +++++++++++++++++++++
2 files changed, 216 insertions(+), 1 deletion(-)
create mode 100755 tools/testing/selftests/forwarding/router_multipath.sh
diff --git a/tools/testing/selftests/forwarding/Makefile b/tools/testing/selftests/forwarding/Makefile
index 4efb0c96af94..48e5de22db05 100644
--- a/tools/testing/selftests/forwarding/Makefile
+++ b/tools/testing/selftests/forwarding/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
# Makefile for forwarding selftests
-TEST_PROGS := bridge.sh router.sh
+TEST_PROGS := bridge.sh router.sh router_multipath.sh
include ../lib.mk
diff --git a/tools/testing/selftests/forwarding/router_multipath.sh b/tools/testing/selftests/forwarding/router_multipath.sh
new file mode 100755
index 000000000000..70f9f2c3794e
--- /dev/null
+++ b/tools/testing/selftests/forwarding/router_multipath.sh
@@ -0,0 +1,215 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+NUM_NETIFS=8
+source lib.sh
+
+h1_create()
+{
+ vrf_create "vrf-h1" 1
+ ip link set dev $h1 master vrf-h1
+
+ ip link set dev vrf-h1 up
+ ip link set dev $h1 up
+
+ ip address add 192.0.2.2/24 dev $h1
+ ip address add 2001:db8:1::2/64 dev $h1
+
+ ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
+ ip route add 2001:db8:2::/64 vrf vrf-h1 nexthop via 2001:db8:1::1
+}
+
+h1_destroy()
+{
+ ip route del 2001:db8:2::/64 vrf vrf-h1
+ ip route del 198.51.100.0/24 vrf vrf-h1
+
+ ip address del 2001:db8:1::2/64 dev $h1
+ ip address del 192.0.2.2/24 dev $h1
+
+ ip link set dev $h1 down
+ vrf_destroy "vrf-h1" 1
+}
+
+h2_create()
+{
+ vrf_create "vrf-h2" 2
+ ip link set dev $h2 master vrf-h2
+
+ ip link set dev vrf-h2 up
+ ip link set dev $h2 up
+
+ ip address add 198.51.100.2/24 dev $h2
+ ip address add 2001:db8:2::2/64 dev $h2
+
+ ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1
+ ip route add 2001:db8:1::/64 vrf vrf-h2 nexthop via 2001:db8:2::1
+}
+
+h2_destroy()
+{
+ ip route del 2001:db8:1::/64 vrf vrf-h2
+ ip route del 192.0.2.0/24 vrf vrf-h2
+
+ ip address del 2001:db8:2::2/64 dev $h2
+ ip address del 198.51.100.2/24 dev $h2
+
+ ip link set dev $h2 down
+ vrf_destroy "vrf-h2" 2
+}
+
+router1_create()
+{
+ vrf_create "vrf-r1" 3
+ ip link set dev $rp11 master vrf-r1
+ ip link set dev $rp12 master vrf-r1
+ ip link set dev $rp13 master vrf-r1
+
+ ip link set dev vrf-r1 up
+ ip link set dev $rp11 up
+ ip link set dev $rp12 up
+ ip link set dev $rp13 up
+
+ ip address add 192.0.2.1/24 dev $rp11
+ ip address add 2001:db8:1::1/64 dev $rp11
+
+ ip address add 169.254.2.12/24 dev $rp12
+ ip address add fe80:2::12/64 dev $rp12
+
+ ip address add 169.254.3.13/24 dev $rp13
+ ip address add fe80:3::13/64 dev $rp13
+
+ ip route add 198.51.100.0/24 vrf vrf-r1 \
+ nexthop via 169.254.2.22 dev $rp12 \
+ nexthop via 169.254.3.23 dev $rp13
+ ip route add 2001:db8:2::/64 vrf vrf-r1 \
+ nexthop via fe80:2::22 dev $rp12 \
+ nexthop via fe80:3::23 dev $rp13
+}
+
+router1_destroy()
+{
+ ip route del 2001:db8:2::/64 vrf vrf-r1
+ ip route del 198.51.100.0/24 vrf vrf-r1
+
+ ip address del fe80:3::13/64 dev $rp13
+ ip address del 169.254.3.13/24 dev $rp13
+
+ ip address del fe80:2::12/64 dev $rp12
+ ip address del 169.254.2.12/24 dev $rp12
+
+ ip address del 2001:db8:1::1/64 dev $rp11
+ ip address del 192.0.2.1/24 dev $rp11
+
+ ip link set dev $rp13 down
+ ip link set dev $rp12 down
+ ip link set dev $rp11 down
+
+ vrf_destroy "vrf-r1" 3
+}
+
+router2_create()
+{
+ vrf_create "vrf-r2" 4
+ ip link set dev $rp21 master vrf-r2
+ ip link set dev $rp22 master vrf-r2
+ ip link set dev $rp23 master vrf-r2
+
+ ip link set dev vrf-r2 up
+ ip link set dev $rp21 up
+ ip link set dev $rp22 up
+ ip link set dev $rp23 up
+
+ ip address add 198.51.100.1/24 dev $rp21
+ ip address add 2001:db8:2::1/64 dev $rp21
+
+ ip address add 169.254.2.22/24 dev $rp22
+ ip address add fe80:2::22/64 dev $rp22
+
+ ip address add 169.254.3.23/24 dev $rp23
+ ip address add fe80:3::23/64 dev $rp23
+
+ ip route add 192.0.2.0/24 vrf vrf-r2 \
+ nexthop via 169.254.2.12 dev $rp22 \
+ nexthop via 169.254.3.13 dev $rp23
+ ip route add 2001:db8:1::/64 vrf vrf-r2 \
+ nexthop via fe80:2::12 dev $rp22 \
+ nexthop via fe80:3::13 dev $rp23
+}
+
+router2_destroy()
+{
+ ip route del 2001:db8:1::/64 vrf vrf-r2
+ ip route del 192.0.2.0/24 vrf vrf-r2
+
+ ip address del fe80:3::23/64 dev $rp23
+ ip address del 169.254.3.23/24 dev $rp23
+
+ ip address del fe80:2::22/64 dev $rp22
+ ip address del 169.254.2.22/24 dev $rp22
+
+ ip address del 2001:db8:2::1/64 dev $rp21
+ ip address del 198.51.100.1/24 dev $rp21
+
+ ip link set dev $rp23 down
+ ip link set dev $rp22 down
+ ip link set dev $rp21 down
+
+ vrf_destroy "vrf-r2" 4
+}
+
+setup_prepare()
+{
+ h1=${NETIFS[p1]}
+ rp11=${NETIFS[p2]}
+
+ rp12=${NETIFS[p3]}
+ rp22=${NETIFS[p4]}
+
+ rp13=${NETIFS[p5]}
+ rp23=${NETIFS[p6]}
+
+ rp21=${NETIFS[p7]}
+ h2=${NETIFS[p8]}
+
+ netifs_arr=($h1 $rp11 $rp12 $rp22 $rp13 $rp23 $rp21 $h2)
+
+ vrf_prepare
+
+ h1_create
+ h2_create
+
+ router1_create
+ router2_create
+
+ forwarding_enable
+}
+
+cleanup()
+{
+ forwarding_restore
+
+ router2_destroy
+ router1_destroy
+
+ h2_destroy
+ h1_destroy
+
+ vrf_cleanup
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+ping_test "vrf-h1" 198.51.100.2
+ping_test "vrf-h1" 2001:db8:2::2
+
+old_mtu=$(mtu_get $h1)
+mtu_change 9000 "${netifs_arr[@]}"
+ping_test "vrf-h1" 198.51.100.2
+ping_test "vrf-h1" 2001:db8:2::2
+mtu_change $old_mtu "${netifs_arr[@]}"
+
+exit $EXIT_STATUS
--
2.14.3
--
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