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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 | #!/bin/bash # SPDX-License-Identifier: GPL-2.0 # Test traffic distribution when there are multiple routes between an IPv4 # GRE tunnel. The tunnel carries IPv4 traffic between multiple hosts. # Multiple routes are in the underlay network. With the default multipath # policy, SW2 will only look at the outer IP addresses, hence only a single # route would be used. # # +-------------------------+ # | H1 | # | $h1 + | # | 192.0.3.{2-62}/24 | | # +-------------------|-----+ # | # +-------------------|------------------------+ # | SW1 | | # | $ol1 + | # | 192.0.3.1/24 | # | | # | + g1 (gre) | # | loc=192.0.2.65 | # | rem=192.0.2.66 --. | # | tos=inherit | | # | v | # | + $ul1 | # | | 192.0.2.129/28 | # +---------------------|----------------------+ # | # +---------------------|----------------------+ # | SW2 | | # | $ul21 + | # | 192.0.2.130/28 | # | | | # ! ________________|_____ | # | / \ | # | | | | # | + $ul22.111 (vlan) + $ul22.222 (vlan) | # | | 192.0.2.145/28 | 192.0.2.161/28 | # | | | | # +--|----------------------|------------------+ # | | # +--|----------------------|------------------+ # | | | | # | + $ul32.111 (vlan) + $ul32.222 (vlan) | # | | 192.0.2.146/28 | 192.0.2.162/28 | # | | | | # | \______________________/ | # | | | # | | | # | $ul31 + | # | 192.0.2.177/28 | SW3 | # +---------------------|----------------------+ # | # +---------------------|----------------------+ # | + $ul4 | # | ^ 192.0.2.178/28 | # | | | # | + g2 (gre) | | # | loc=192.0.2.66 | | # | rem=192.0.2.65 --' | # | tos=inherit | # | | # | $ol4 + | # | 192.0.4.1/24 | SW4 | # +--------------------|-----------------------+ # | # +--------------------|---------+ # | | | # | $h2 + | # | 192.0.4.{2-62}/24 H2 | # +------------------------------+ ALL_TESTS=" ping_ipv4 multipath_ipv4 " NUM_NETIFS=10 source lib.sh h1_create() { simple_if_init $h1 192.0.3.2/24 ip route add vrf v$h1 192.0.4.0/24 via 192.0.3.1 } h1_destroy() { ip route del vrf v$h1 192.0.4.0/24 via 192.0.3.1 simple_if_fini $h1 192.0.3.2/24 } sw1_create() { simple_if_init $ol1 192.0.3.1/24 __simple_if_init $ul1 v$ol1 192.0.2.129/28 tunnel_create g1 gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1 __simple_if_init g1 v$ol1 192.0.2.65/32 ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130 ip route add vrf v$ol1 192.0.4.0/24 nexthop dev g1 } sw1_destroy() { ip route del vrf v$ol1 192.0.4.0/24 ip route del vrf v$ol1 192.0.2.66/32 __simple_if_fini g1 192.0.2.65/32 tunnel_destroy g1 __simple_if_fini $ul1 192.0.2.129/28 simple_if_fini $ol1 192.0.3.1/24 } sw2_create() { simple_if_init $ul21 192.0.2.130/28 __simple_if_init $ul22 v$ul21 vlan_create $ul22 111 v$ul21 192.0.2.145/28 vlan_create $ul22 222 v$ul21 192.0.2.161/28 ip route add vrf v$ul21 192.0.2.65/32 via 192.0.2.129 ip route add vrf v$ul21 192.0.2.66/32 \ nexthop via 192.0.2.146 \ nexthop via 192.0.2.162 } sw2_destroy() { ip route del vrf v$ul21 192.0.2.66/32 ip route del vrf v$ul21 192.0.2.65/32 vlan_destroy $ul22 222 vlan_destroy $ul22 111 __simple_if_fini $ul22 simple_if_fini $ul21 192.0.2.130/28 } sw3_create() { simple_if_init $ul31 192.0.2.177/28 __simple_if_init $ul32 v$ul31 vlan_create $ul32 111 v$ul31 192.0.2.146/28 vlan_create $ul32 222 v$ul31 192.0.2.162/28 ip route add vrf v$ul31 192.0.2.66/32 via 192.0.2.178 ip route add vrf v$ul31 192.0.2.65/32 \ nexthop via 192.0.2.145 \ nexthop via 192.0.2.161 tc qdisc add dev $ul32 clsact tc filter add dev $ul32 ingress pref 111 prot 802.1Q \ flower vlan_id 111 action pass tc filter add dev $ul32 ingress pref 222 prot 802.1Q \ flower vlan_id 222 action pass } sw3_destroy() { tc qdisc del dev $ul32 clsact ip route del vrf v$ul31 192.0.2.65/32 ip route del vrf v$ul31 192.0.2.66/32 vlan_destroy $ul32 222 vlan_destroy $ul32 111 __simple_if_fini $ul32 simple_if_fini $ul31 192.0.2.177/28 } sw4_create() { simple_if_init $ol4 192.0.4.1/24 __simple_if_init $ul4 v$ol4 192.0.2.178/28 tunnel_create g2 gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol4 __simple_if_init g2 v$ol4 192.0.2.66/32 ip route add vrf v$ol4 192.0.2.65/32 via 192.0.2.177 ip route add vrf v$ol4 192.0.3.0/24 nexthop dev g2 } sw4_destroy() { ip route del vrf v$ol4 192.0.3.0/24 ip route del vrf v$ol4 192.0.2.65/32 __simple_if_fini g2 192.0.2.66/32 tunnel_destroy g2 __simple_if_fini $ul4 192.0.2.178/28 simple_if_fini $ol4 192.0.4.1/24 } h2_create() { simple_if_init $h2 192.0.4.2/24 ip route add vrf v$h2 192.0.3.0/24 via 192.0.4.1 } h2_destroy() { ip route del vrf v$h2 192.0.3.0/24 via 192.0.4.1 simple_if_fini $h2 192.0.4.2/24 } setup_prepare() { h1=${NETIFS[p1]} ol1=${NETIFS[p2]} ul1=${NETIFS[p3]} ul21=${NETIFS[p4]} ul22=${NETIFS[p5]} ul32=${NETIFS[p6]} ul31=${NETIFS[p7]} ul4=${NETIFS[p8]} ol4=${NETIFS[p9]} h2=${NETIFS[p10]} vrf_prepare h1_create sw1_create sw2_create sw3_create sw4_create h2_create forwarding_enable } cleanup() { pre_cleanup forwarding_restore h2_destroy sw4_destroy sw3_destroy sw2_destroy sw1_destroy h1_destroy vrf_cleanup } multipath4_test() { local what=$1; shift local weight1=$1; shift local weight2=$1; shift sysctl_set net.ipv4.fib_multipath_hash_policy 2 ip route replace vrf v$ul21 192.0.2.66/32 \ nexthop via 192.0.2.146 weight $weight1 \ nexthop via 192.0.2.162 weight $weight2 local t0_111=$(tc_rule_stats_get $ul32 111 ingress) local t0_222=$(tc_rule_stats_get $ul32 222 ingress) ip vrf exec v$h1 \ $MZ $h1 -q -p 64 -A "192.0.3.2-192.0.3.62" -B "192.0.4.2-192.0.4.62" \ -d $MZ_DELAY -c 50 -t udp "sp=1024,dp=1024" sleep 1 local t1_111=$(tc_rule_stats_get $ul32 111 ingress) local t1_222=$(tc_rule_stats_get $ul32 222 ingress) local d111=$((t1_111 - t0_111)) local d222=$((t1_222 - t0_222)) multipath_eval "$what" $weight1 $weight2 $d111 $d222 ip route replace vrf v$ul21 192.0.2.66/32 \ nexthop via 192.0.2.146 \ nexthop via 192.0.2.162 sysctl_restore net.ipv4.fib_multipath_hash_policy } ping_ipv4() { ping_test $h1 192.0.4.2 } multipath_ipv4() { log_info "Running IPv4 over GRE over 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 |