name : router_mpath_nh_res.sh #!/bin/bash # SPDX-License-Identifier: GPL-2.0 ALL_TESTS=" ping_ipv4 ping_ipv6 multipath_test " NUM_NETIFS=8 source lib.sh h1_create() { vrf_create "vrf-h1" 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" } h2_create() { vrf_create "vrf-h2" 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" } router1_create() { vrf_create "vrf-r1" 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 } 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 nexthop del id 103 ip nexthop del id 101 ip nexthop del id 102 ip nexthop del id 106 ip nexthop del id 104 ip nexthop del id 105 ip link set dev $rp13 down ip link set dev $rp12 down ip link set dev $rp11 down vrf_destroy "vrf-r1" } router2_create() { vrf_create "vrf-r2" 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 } 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 nexthop del id 201 ip nexthop del id 202 ip nexthop del id 204 ip nexthop del id 205 ip link set dev $rp23 down ip link set dev $rp22 down ip link set dev $rp21 down vrf_destroy "vrf-r2" } routing_nh_obj() { ip nexthop add id 101 via 169.254.2.22 dev $rp12 ip nexthop add id 102 via 169.254.3.23 dev $rp13 ip nexthop add id 103 group 101/102 type resilient buckets 512 \ idle_timer 0 ip route add 198.51.100.0/24 vrf vrf-r1 nhid 103 ip nexthop add id 104 via fe80:2::22 dev $rp12 ip nexthop add id 105 via fe80:3::23 dev $rp13 ip nexthop add id 106 group 104/105 type resilient buckets 512 \ idle_timer 0 ip route add 2001:db8:2::/64 vrf vrf-r1 nhid 106 ip nexthop add id 201 via 169.254.2.12 dev $rp22 ip nexthop add id 202 via 169.254.3.13 dev $rp23 ip nexthop add id 203 group 201/202 type resilient buckets 512 \ idle_timer 0 ip route add 192.0.2.0/24 vrf vrf-r2 nhid 203 ip nexthop add id 204 via fe80:2::12 dev $rp22 ip nexthop add id 205 via fe80:3::13 dev $rp23 ip nexthop add id 206 group 204/205 type resilient buckets 512 \ idle_timer 0 ip route add 2001:db8:1::/64 vrf vrf-r2 nhid 206 } multipath4_test() { local desc="$1" local weight_rp12=$2 local weight_rp13=$3 local t0_rp12 t0_rp13 t1_rp12 t1_rp13 local packets_rp12 packets_rp13 # Transmit multiple flows from h1 to h2 and make sure they are # distributed between both multipath links (rp12 and rp13) # according to the provided weights. sysctl_set net.ipv4.fib_multipath_hash_policy 1 t0_rp12=$(link_stats_tx_packets_get $rp12) t0_rp13=$(link_stats_tx_packets_get $rp13) ip vrf exec vrf-h1 $MZ $h1 -q -p 64 -A 192.0.2.2 -B 198.51.100.2 \ -d 1msec -t udp "sp=1024,dp=0-32768" t1_rp12=$(link_stats_tx_packets_get $rp12) t1_rp13=$(link_stats_tx_packets_get $rp13) let "packets_rp12 = $t1_rp12 - $t0_rp12" let "packets_rp13 = $t1_rp13 - $t0_rp13" multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13 # Restore settings. sysctl_restore net.ipv4.fib_multipath_hash_policy } multipath6_l4_test() { local desc="$1" local weight_rp12=$2 local weight_rp13=$3 local t0_rp12 t0_rp13 t1_rp12 t1_rp13 local packets_rp12 packets_rp13 # Transmit multiple flows from h1 to h2 and make sure they are # distributed between both multipath links (rp12 and rp13) # according to the provided weights. sysctl_set net.ipv6.fib_multipath_hash_policy 1 t0_rp12=$(link_stats_tx_packets_get $rp12) t0_rp13=$(link_stats_tx_packets_get $rp13) $MZ $h1 -6 -q -p 64 -A 2001:db8:1::2 -B 2001:db8:2::2 \ -d 1msec -t udp "sp=1024,dp=0-32768" t1_rp12=$(link_stats_tx_packets_get $rp12) t1_rp13=$(link_stats_tx_packets_get $rp13) let "packets_rp12 = $t1_rp12 - $t0_rp12" let "packets_rp13 = $t1_rp13 - $t0_rp13" multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13 sysctl_restore net.ipv6.fib_multipath_hash_policy } multipath_test() { # Without an idle timer, weight replacement should happen immediately. log_info "Running multipath tests without an idle timer" ip nexthop replace id 103 group 101/102 type resilient idle_timer 0 ip nexthop replace id 106 group 104/105 type resilient idle_timer 0 log_info "Running IPv4 multipath tests" ip nexthop replace id 103 group 101,1/102,1 type resilient multipath4_test "ECMP" 1 1 ip nexthop replace id 103 group 101,2/102,1 type resilient multipath4_test "Weighted MP 2:1" 2 1 ip nexthop replace id 103 group 101,11/102,45 type resilient multipath4_test "Weighted MP 11:45" 11 45 ip nexthop replace id 103 group 101,1/102,1 type resilient log_info "Running IPv6 L4 hash multipath tests" ip nexthop replace id 106 group 104,1/105,1 type resilient multipath6_l4_test "ECMP" 1 1 ip nexthop replace id 106 group 104,2/105,1 type resilient multipath6_l4_test "Weighted MP 2:1" 2 1 ip nexthop replace id 106 group 104,11/105,45 type resilient multipath6_l4_test "Weighted MP 11:45" 11 45 ip nexthop replace id 106 group 104,1/105,1 type resilient # With an idle timer, weight replacement should not happen, so the # expected ratio should always be the initial one (1:1). log_info "Running multipath tests with an idle timer of 120 seconds" ip nexthop replace id 103 group 101/102 type resilient idle_timer 120 ip nexthop replace id 106 group 104/105 type resilient idle_timer 120 log_info "Running IPv4 multipath tests" ip nexthop replace id 103 group 101,1/102,1 type resilient multipath4_test "ECMP" 1 1 ip nexthop replace id 103 group 101,2/102,1 type resilient multipath4_test "Weighted MP 2:1" 1 1 ip nexthop replace id 103 group 101,11/102,45 type resilient multipath4_test "Weighted MP 11:45" 1 1 ip nexthop replace id 103 group 101,1/102,1 type resilient log_info "Running IPv6 L4 hash multipath tests" ip nexthop replace id 106 group 104,1/105,1 type resilient multipath6_l4_test "ECMP" 1 1 ip nexthop replace id 106 group 104,2/105,1 type resilient multipath6_l4_test "Weighted MP 2:1" 1 1 ip nexthop replace id 106 group 104,11/105,45 type resilient multipath6_l4_test "Weighted MP 11:45" 1 1 ip nexthop replace id 106 group 104,1/105,1 type resilient # With a short idle timer and enough idle time, weight replacement # should happen. log_info "Running multipath tests with an idle timer of 5 seconds" ip nexthop replace id 103 group 101/102 type resilient idle_timer 5 ip nexthop replace id 106 group 104/105 type resilient idle_timer 5 log_info "Running IPv4 multipath tests" sleep 10 ip nexthop replace id 103 group 101,1/102,1 type resilient multipath4_test "ECMP" 1 1 sleep 10 ip nexthop replace id 103 group 101,2/102,1 type resilient multipath4_test "Weighted MP 2:1" 2 1 sleep 10 ip nexthop replace id 103 group 101,11/102,45 type resilient multipath4_test "Weighted MP 11:45" 11 45 ip nexthop replace id 103 group 101,1/102,1 type resilient log_info "Running IPv6 L4 hash multipath tests" sleep 10 ip nexthop replace id 106 group 104,1/105,1 type resilient multipath6_l4_test "ECMP" 1 1 sleep 10 ip nexthop replace id 106 group 104,2/105,1 type resilient multipath6_l4_test "Weighted MP 2:1" 2 1 sleep 10 ip nexthop replace id 106 group 104,11/105,45 type resilient multipath6_l4_test "Weighted MP 11:45" 11 45 ip nexthop replace id 106 group 104,1/105,1 type resilient } 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]} vrf_prepare h1_create h2_create router1_create router2_create forwarding_enable } cleanup() { pre_cleanup forwarding_restore router2_destroy router1_destroy h2_destroy h1_destroy vrf_cleanup } ping_ipv4() { ping_test $h1 198.51.100.2 } ping_ipv6() { ping6_test $h1 2001:db8:2::2 } ip nexthop ls >/dev/null 2>&1 if [ $? -ne 0 ]; then echo "Nexthop objects not supported; skipping tests" exit $ksft_skip fi trap cleanup EXIT setup_prepare setup_wait routing_nh_obj tests_run exit $EXIT_STATUS