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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 | #!/bin/bash # SPDX-License-Identifier: GPL-2.0 # Test traffic distribution when a wECMP route forwards traffic to two GRE # tunnels. # # +-------------------------+ # | H1 | # | $h1 + | # | 192.0.2.1/28 | | # +-------------------|-----+ # | # +-------------------|------------------------+ # | SW1 | | # | $ol1 + | # | 192.0.2.2/28 | # | | # | + g1a (gre) + g1b (gre) | # | loc=192.0.2.65 loc=192.0.2.81 | # | rem=192.0.2.66 --. rem=192.0.2.82 --. | # | tos=inherit | tos=inherit | | # | .------------------' | | # | | .------------------' | # | v v | # | + $ul1.111 (vlan) + $ul1.222 (vlan) | # | | 192.0.2.129/28 | 192.0.2.145/28 | # | \ / | # | \________________/ | # | | | # | + $ul1 | # +------------|-------------------------------+ # | # +------------|-------------------------------+ # | SW2 + $ul2 | # | _______|________ | # | / \ | # | / \ | # | + $ul2.111 (vlan) + $ul2.222 (vlan) | # | ^ 192.0.2.130/28 ^ 192.0.2.146/28 | # | | | | # | | '------------------. | # | '------------------. | | # | + g2a (gre) | + g2b (gre) | | # | loc=192.0.2.66 | loc=192.0.2.82 | | # | rem=192.0.2.65 --' rem=192.0.2.81 --' | # | tos=inherit tos=inherit | # | | # | $ol2 + | # | 192.0.2.17/28 | | # +-------------------|------------------------+ # | # +-------------------|-----+ # | H2 | | # | $h2 + | # | 192.0.2.18/28 | # +-------------------------+ ALL_TESTS=" ping_ipv4 multipath_ipv4 " NUM_NETIFS=6 source lib.sh h1_create() { simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64 ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2 } h1_destroy() { ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2 simple_if_fini $h1 192.0.2.1/28 } sw1_create() { simple_if_init $ol1 192.0.2.2/28 __simple_if_init $ul1 v$ol1 vlan_create $ul1 111 v$ol1 192.0.2.129/28 vlan_create $ul1 222 v$ol1 192.0.2.145/28 tunnel_create g1a gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1 __simple_if_init g1a v$ol1 192.0.2.65/32 ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130 tunnel_create g1b gre 192.0.2.81 192.0.2.82 tos inherit dev v$ol1 __simple_if_init g1b v$ol1 192.0.2.81/32 ip route add vrf v$ol1 192.0.2.82/32 via 192.0.2.146 ip route add vrf v$ol1 192.0.2.16/28 \ nexthop dev g1a \ nexthop dev g1b } sw1_destroy() { ip route del vrf v$ol1 192.0.2.16/28 ip route del vrf v$ol1 192.0.2.82/32 via 192.0.2.146 __simple_if_fini g1b 192.0.2.81/32 tunnel_destroy g1b ip route del vrf v$ol1 192.0.2.66/32 via 192.0.2.130 __simple_if_fini g1a 192.0.2.65/32 tunnel_destroy g1a vlan_destroy $ul1 222 vlan_destroy $ul1 111 __simple_if_fini $ul1 simple_if_fini $ol1 192.0.2.2/28 } sw2_create() { simple_if_init $ol2 192.0.2.17/28 __simple_if_init $ul2 v$ol2 vlan_create $ul2 111 v$ol2 192.0.2.130/28 vlan_create $ul2 222 v$ol2 192.0.2.146/28 tunnel_create g2a gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol2 __simple_if_init g2a v$ol2 192.0.2.66/32 ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129 tunnel_create g2b gre 192.0.2.82 192.0.2.81 tos inherit dev v$ol2 __simple_if_init g2b v$ol2 192.0.2.82/32 ip route add vrf v$ol2 192.0.2.81/32 via 192.0.2.145 ip route add vrf v$ol2 192.0.2.0/28 \ nexthop dev g2a \ nexthop dev g2b tc qdisc add dev $ul2 clsact tc filter add dev $ul2 ingress pref 111 prot 802.1Q \ flower vlan_id 111 action pass tc filter add dev $ul2 ingress pref 222 prot 802.1Q \ flower vlan_id 222 action pass } sw2_destroy() { tc qdisc del dev $ul2 clsact ip route del vrf v$ol2 192.0.2.0/28 ip route del vrf v$ol2 192.0.2.81/32 via 192.0.2.145 __simple_if_fini g2b 192.0.2.82/32 tunnel_destroy g2b ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129 __simple_if_fini g2a 192.0.2.66/32 tunnel_destroy g2a vlan_destroy $ul2 222 vlan_destroy $ul2 111 __simple_if_fini $ul2 simple_if_fini $ol2 192.0.2.17/28 } h2_create() { simple_if_init $h2 192.0.2.18/28 ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17 } h2_destroy() { ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17 simple_if_fini $h2 192.0.2.18/28 } setup_prepare() { h1=${NETIFS[p1]} ol1=${NETIFS[p2]} ul1=${NETIFS[p3]} ul2=${NETIFS[p4]} ol2=${NETIFS[p5]} h2=${NETIFS[p6]} vrf_prepare h1_create sw1_create sw2_create h2_create forwarding_enable } cleanup() { pre_cleanup forwarding_restore h2_destroy sw2_destroy sw1_destroy h1_destroy vrf_cleanup } multipath4_test() { local what=$1; shift local weight1=$1; shift local weight2=$1; shift sysctl_set net.ipv4.fib_multipath_hash_policy 1 ip route replace vrf v$ol1 192.0.2.16/28 \ nexthop dev g1a weight $weight1 \ nexthop dev g1b weight $weight2 local t0_111=$(tc_rule_stats_get $ul2 111 ingress) local t0_222=$(tc_rule_stats_get $ul2 222 ingress) ip vrf exec v$h1 \ $MZ $h1 -q -p 64 -A 192.0.2.1 -B 192.0.2.18 \ -d 1msec -t udp "sp=1024,dp=0-32768" local t1_111=$(tc_rule_stats_get $ul2 111 ingress) local t1_222=$(tc_rule_stats_get $ul2 222 ingress) local d111=$((t1_111 - t0_111)) local d222=$((t1_222 - t0_222)) multipath_eval "$what" $weight1 $weight2 $d111 $d222 ip route replace vrf v$ol1 192.0.2.16/28 \ nexthop dev g1a \ nexthop dev g1b sysctl_restore net.ipv4.fib_multipath_hash_policy } ping_ipv4() { ping_test $h1 192.0.2.18 } multipath_ipv4() { 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 } trap cleanup EXIT setup_prepare setup_wait tests_run exit $EXIT_STATUS |