gre_inner_v6_multipath.sh (7843B)
1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3 4# Test traffic distribution when there are multiple routes between an IPv4 5# GRE tunnel. The tunnel carries IPv6 traffic between multiple hosts. 6# Multiple routes are in the underlay network. With the default multipath 7# policy, SW2 will only look at the outer IP addresses, hence only a single 8# route would be used. 9# 10# +-------------------------+ 11# | H1 | 12# | $h1 + | 13# | 2001:db8:1::2/64 | | 14# +-------------------|-----+ 15# | 16# +-------------------|------------------------+ 17# | SW1 | | 18# | $ol1 + | 19# | 2001:db8:1::1/64 | 20# | | 21# | + g1 (gre) | 22# | loc=192.0.2.65 | 23# | rem=192.0.2.66 --. | 24# | tos=inherit | | 25# | v | 26# | + $ul1 | 27# | | 192.0.2.129/28 | 28# +---------------------|----------------------+ 29# | 30# +---------------------|----------------------+ 31# | SW2 | | 32# | $ul21 + | 33# | 192.0.2.130/28 | 34# | | | 35# ! ________________|_____ | 36# | / \ | 37# | | | | 38# | + $ul22.111 (vlan) + $ul22.222 (vlan) | 39# | | 192.0.2.145/28 | 192.0.2.161/28 | 40# | | | | 41# +--|----------------------|------------------+ 42# | | 43# +--|----------------------|------------------+ 44# | | | | 45# | + $ul32.111 (vlan) + $ul32.222 (vlan) | 46# | | 192.0.2.146/28 | 192.0.2.162/28 | 47# | | | | 48# | \______________________/ | 49# | | | 50# | | | 51# | $ul31 + | 52# | 192.0.2.177/28 | SW3 | 53# +---------------------|----------------------+ 54# | 55# +---------------------|----------------------+ 56# | + $ul4 | 57# | ^ 192.0.2.178/28 | 58# | | | 59# | + g2 (gre) | | 60# | loc=192.0.2.66 | | 61# | rem=192.0.2.65 --' | 62# | tos=inherit | 63# | | 64# | $ol4 + | 65# | 2001:db8:2::1/64 | SW4 | 66# +--------------------|-----------------------+ 67# | 68# +--------------------|---------+ 69# | | | 70# | $h2 + | 71# | 2001:db8:2::2/64 H2 | 72# +------------------------------+ 73 74ALL_TESTS=" 75 ping_ipv6 76 multipath_ipv6 77" 78 79NUM_NETIFS=10 80source lib.sh 81 82h1_create() 83{ 84 simple_if_init $h1 2001:db8:1::2/64 85 ip -6 route add vrf v$h1 2001:db8:2::/64 via 2001:db8:1::1 86} 87 88h1_destroy() 89{ 90 ip -6 route del vrf v$h1 2001:db8:2::/64 via 2001:db8:1::1 91 simple_if_fini $h1 2001:db8:1::2/64 92} 93 94sw1_create() 95{ 96 simple_if_init $ol1 2001:db8:1::1/64 97 __simple_if_init $ul1 v$ol1 192.0.2.129/28 98 99 tunnel_create g1 gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1 100 __simple_if_init g1 v$ol1 192.0.2.65/32 101 ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130 102 103 ip -6 route add vrf v$ol1 2001:db8:2::/64 dev g1 104} 105 106sw1_destroy() 107{ 108 ip -6 route del vrf v$ol1 2001:db8:2::/64 109 110 ip route del vrf v$ol1 192.0.2.66/32 111 __simple_if_fini g1 192.0.2.65/32 112 tunnel_destroy g1 113 114 __simple_if_fini $ul1 192.0.2.129/28 115 simple_if_fini $ol1 2001:db8:1::1/64 116} 117 118sw2_create() 119{ 120 simple_if_init $ul21 192.0.2.130/28 121 __simple_if_init $ul22 v$ul21 122 vlan_create $ul22 111 v$ul21 192.0.2.145/28 123 vlan_create $ul22 222 v$ul21 192.0.2.161/28 124 125 ip route add vrf v$ul21 192.0.2.65/32 via 192.0.2.129 126 ip route add vrf v$ul21 192.0.2.66/32 \ 127 nexthop via 192.0.2.146 \ 128 nexthop via 192.0.2.162 129} 130 131sw2_destroy() 132{ 133 ip route del vrf v$ul21 192.0.2.66/32 134 ip route del vrf v$ul21 192.0.2.65/32 135 136 vlan_destroy $ul22 222 137 vlan_destroy $ul22 111 138 __simple_if_fini $ul22 139 simple_if_fini $ul21 192.0.2.130/28 140} 141 142sw3_create() 143{ 144 simple_if_init $ul31 192.0.2.177/28 145 __simple_if_init $ul32 v$ul31 146 vlan_create $ul32 111 v$ul31 192.0.2.146/28 147 vlan_create $ul32 222 v$ul31 192.0.2.162/28 148 149 ip route add vrf v$ul31 192.0.2.66/32 via 192.0.2.178 150 ip route add vrf v$ul31 192.0.2.65/32 \ 151 nexthop via 192.0.2.145 \ 152 nexthop via 192.0.2.161 153 154 tc qdisc add dev $ul32 clsact 155 tc filter add dev $ul32 ingress pref 111 prot 802.1Q \ 156 flower vlan_id 111 action pass 157 tc filter add dev $ul32 ingress pref 222 prot 802.1Q \ 158 flower vlan_id 222 action pass 159} 160 161sw3_destroy() 162{ 163 tc qdisc del dev $ul32 clsact 164 165 ip route del vrf v$ul31 192.0.2.65/32 166 ip route del vrf v$ul31 192.0.2.66/32 167 168 vlan_destroy $ul32 222 169 vlan_destroy $ul32 111 170 __simple_if_fini $ul32 171 simple_if_fini $ul31 192.0.2.177/28 172} 173 174sw4_create() 175{ 176 simple_if_init $ol4 2001:db8:2::1/64 177 __simple_if_init $ul4 v$ol4 192.0.2.178/28 178 179 tunnel_create g2 gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol4 180 __simple_if_init g2 v$ol4 192.0.2.66/32 181 ip route add vrf v$ol4 192.0.2.65/32 via 192.0.2.177 182 183 ip -6 route add vrf v$ol4 2001:db8:1::/64 dev g2 184} 185 186sw4_destroy() 187{ 188 ip -6 route del vrf v$ol4 2001:db8:1::/64 189 190 ip route del vrf v$ol4 192.0.2.65/32 191 __simple_if_fini g2 192.0.2.66/32 192 tunnel_destroy g2 193 194 __simple_if_fini $ul4 192.0.2.178/28 195 simple_if_fini $ol4 2001:db8:2::1/64 196} 197 198h2_create() 199{ 200 simple_if_init $h2 2001:db8:2::2/64 201 ip -6 route add vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1 202} 203 204h2_destroy() 205{ 206 ip -6 route del vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1 207 simple_if_fini $h2 2001:db8:2::2/64 208} 209 210setup_prepare() 211{ 212 h1=${NETIFS[p1]} 213 214 ol1=${NETIFS[p2]} 215 ul1=${NETIFS[p3]} 216 217 ul21=${NETIFS[p4]} 218 ul22=${NETIFS[p5]} 219 220 ul32=${NETIFS[p6]} 221 ul31=${NETIFS[p7]} 222 223 ul4=${NETIFS[p8]} 224 ol4=${NETIFS[p9]} 225 226 h2=${NETIFS[p10]} 227 228 vrf_prepare 229 h1_create 230 sw1_create 231 sw2_create 232 sw3_create 233 sw4_create 234 h2_create 235 236 forwarding_enable 237} 238 239cleanup() 240{ 241 pre_cleanup 242 243 forwarding_restore 244 245 h2_destroy 246 sw4_destroy 247 sw3_destroy 248 sw2_destroy 249 sw1_destroy 250 h1_destroy 251 vrf_cleanup 252} 253 254multipath6_test() 255{ 256 local what=$1; shift 257 local weight1=$1; shift 258 local weight2=$1; shift 259 260 sysctl_set net.ipv4.fib_multipath_hash_policy 2 261 ip route replace vrf v$ul21 192.0.2.66/32 \ 262 nexthop via 192.0.2.146 weight $weight1 \ 263 nexthop via 192.0.2.162 weight $weight2 264 265 local t0_111=$(tc_rule_stats_get $ul32 111 ingress) 266 local t0_222=$(tc_rule_stats_get $ul32 222 ingress) 267 268 ip vrf exec v$h1 \ 269 $MZ $h1 -6 -q -p 64 -A "2001:db8:1::2-2001:db8:1::1e" \ 270 -B "2001:db8:2::2-2001:db8:2::1e" \ 271 -d 1msec -c 50 -t udp "sp=1024,dp=1024" 272 sleep 1 273 274 local t1_111=$(tc_rule_stats_get $ul32 111 ingress) 275 local t1_222=$(tc_rule_stats_get $ul32 222 ingress) 276 277 local d111=$((t1_111 - t0_111)) 278 local d222=$((t1_222 - t0_222)) 279 multipath_eval "$what" $weight1 $weight2 $d111 $d222 280 281 ip route replace vrf v$ul21 192.0.2.66/32 \ 282 nexthop via 192.0.2.146 \ 283 nexthop via 192.0.2.162 284 sysctl_restore net.ipv4.fib_multipath_hash_policy 285} 286 287ping_ipv6() 288{ 289 ping_test $h1 2001:db8:2::2 290} 291 292multipath_ipv6() 293{ 294 log_info "Running IPv6 over GRE over IPv4 multipath tests" 295 multipath6_test "ECMP" 1 1 296 multipath6_test "Weighted MP 2:1" 2 1 297 multipath6_test "Weighted MP 11:45" 11 45 298} 299 300trap cleanup EXIT 301 302setup_prepare 303setup_wait 304tests_run 305 306exit $EXIT_STATUS