name : router_multipath.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 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" } 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 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" } 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 configured weights. sysctl_set net.ipv4.fib_multipath_hash_policy 1 ip route replace 198.51.100.0/24 vrf vrf-r1 \ nexthop via 169.254.2.22 dev $rp12 weight $weight_rp12 \ nexthop via 169.254.3.23 dev $rp13 weight $weight_rp13 t0_rp12=$(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. ip route replace 198.51.100.0/24 vrf vrf-r1 \ nexthop via 169.254.2.22 dev $rp12 \ nexthop via 169.254.3.23 dev $rp13 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 configured weights. sysctl_set net.ipv6.fib_multipath_hash_policy 1 ip route replace 2001:db8:2::/64 vrf vrf-r1 \ nexthop via fe80:2::22 dev $rp12 weight $weight_rp12 \ nexthop via fe80:3::23 dev $rp13 weight $weight_rp13 t0_rp12=$(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 ip route replace 2001:db8:2::/64 vrf vrf-r1 \ nexthop via fe80:2::22 dev $rp12 \ nexthop via fe80:3::23 dev $rp13 sysctl_restore net.ipv6.fib_multipath_hash_policy } multipath6_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 ip route replace 2001:db8:2::/64 vrf vrf-r1 \ nexthop via fe80:2::22 dev $rp12 weight $weight_rp12 \ nexthop via fe80:3::23 dev $rp13 weight $weight_rp13 t0_rp12=$(link_stats_tx_packets_get $rp12) t0_rp13=$(link_stats_tx_packets_get $rp13) # Generate 16384 echo requests, each with a random flow label. for _ in $(seq 1 16384); do ip vrf exec vrf-h1 $PING6 2001:db8:2::2 -F 0 -c 1 -q &> /dev/null done t1_rp12=$(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 ip route replace 2001:db8:2::/64 vrf vrf-r1 \ nexthop via fe80:2::22 dev $rp12 \ nexthop via fe80:3::23 dev $rp13 } multipath_test() { log_info "Running IPv4 multipath tests" multipath4_test "ECMP" 1 1 multipath4_test "Weighted MP 2:1" 2 1 multipath4_test "Weighted MP 11:45" 11 45 log_info "Running IPv6 multipath tests" multipath6_test "ECMP" 1 1 multipath6_test "Weighted MP 2:1" 2 1 multipath6_test "Weighted MP 11:45" 11 45 log_info "Running IPv6 L4 hash multipath tests" multipath6_l4_test "ECMP" 1 1 multipath6_l4_test "Weighted MP 2:1" 2 1 multipath6_l4_test "Weighted MP 11:45" 11 45 } setup_prepare() { h1=${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 } trap cleanup EXIT setup_prepare setup_wait tests_run exit $EXIT_STATUS