gre_multipath.sh (6439B)
1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3 4# Test traffic distribution when a wECMP route forwards traffic to two GRE 5# tunnels. 6# 7# +-------------------------+ 8# | H1 | 9# | $h1 + | 10# | 192.0.2.1/28 | | 11# +-------------------|-----+ 12# | 13# +-------------------|------------------------+ 14# | SW1 | | 15# | $ol1 + | 16# | 192.0.2.2/28 | 17# | | 18# | + g1a (gre) + g1b (gre) | 19# | loc=192.0.2.65 loc=192.0.2.81 | 20# | rem=192.0.2.66 --. rem=192.0.2.82 --. | 21# | tos=inherit | tos=inherit | | 22# | .------------------' | | 23# | | .------------------' | 24# | v v | 25# | + $ul1.111 (vlan) + $ul1.222 (vlan) | 26# | | 192.0.2.129/28 | 192.0.2.145/28 | 27# | \ / | 28# | \________________/ | 29# | | | 30# | + $ul1 | 31# +------------|-------------------------------+ 32# | 33# +------------|-------------------------------+ 34# | SW2 + $ul2 | 35# | _______|________ | 36# | / \ | 37# | / \ | 38# | + $ul2.111 (vlan) + $ul2.222 (vlan) | 39# | ^ 192.0.2.130/28 ^ 192.0.2.146/28 | 40# | | | | 41# | | '------------------. | 42# | '------------------. | | 43# | + g2a (gre) | + g2b (gre) | | 44# | loc=192.0.2.66 | loc=192.0.2.82 | | 45# | rem=192.0.2.65 --' rem=192.0.2.81 --' | 46# | tos=inherit tos=inherit | 47# | | 48# | $ol2 + | 49# | 192.0.2.17/28 | | 50# +-------------------|------------------------+ 51# | 52# +-------------------|-----+ 53# | H2 | | 54# | $h2 + | 55# | 192.0.2.18/28 | 56# +-------------------------+ 57 58ALL_TESTS=" 59 ping_ipv4 60 multipath_ipv4 61" 62 63NUM_NETIFS=6 64source lib.sh 65 66h1_create() 67{ 68 simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64 69 ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2 70} 71 72h1_destroy() 73{ 74 ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2 75 simple_if_fini $h1 192.0.2.1/28 76} 77 78sw1_create() 79{ 80 simple_if_init $ol1 192.0.2.2/28 81 __simple_if_init $ul1 v$ol1 82 vlan_create $ul1 111 v$ol1 192.0.2.129/28 83 vlan_create $ul1 222 v$ol1 192.0.2.145/28 84 85 tunnel_create g1a gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1 86 __simple_if_init g1a v$ol1 192.0.2.65/32 87 ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130 88 89 tunnel_create g1b gre 192.0.2.81 192.0.2.82 tos inherit dev v$ol1 90 __simple_if_init g1b v$ol1 192.0.2.81/32 91 ip route add vrf v$ol1 192.0.2.82/32 via 192.0.2.146 92 93 ip route add vrf v$ol1 192.0.2.16/28 \ 94 nexthop dev g1a \ 95 nexthop dev g1b 96} 97 98sw1_destroy() 99{ 100 ip route del vrf v$ol1 192.0.2.16/28 101 102 ip route del vrf v$ol1 192.0.2.82/32 via 192.0.2.146 103 __simple_if_fini g1b 192.0.2.81/32 104 tunnel_destroy g1b 105 106 ip route del vrf v$ol1 192.0.2.66/32 via 192.0.2.130 107 __simple_if_fini g1a 192.0.2.65/32 108 tunnel_destroy g1a 109 110 vlan_destroy $ul1 222 111 vlan_destroy $ul1 111 112 __simple_if_fini $ul1 113 simple_if_fini $ol1 192.0.2.2/28 114} 115 116sw2_create() 117{ 118 simple_if_init $ol2 192.0.2.17/28 119 __simple_if_init $ul2 v$ol2 120 vlan_create $ul2 111 v$ol2 192.0.2.130/28 121 vlan_create $ul2 222 v$ol2 192.0.2.146/28 122 123 tunnel_create g2a gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol2 124 __simple_if_init g2a v$ol2 192.0.2.66/32 125 ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129 126 127 tunnel_create g2b gre 192.0.2.82 192.0.2.81 tos inherit dev v$ol2 128 __simple_if_init g2b v$ol2 192.0.2.82/32 129 ip route add vrf v$ol2 192.0.2.81/32 via 192.0.2.145 130 131 ip route add vrf v$ol2 192.0.2.0/28 \ 132 nexthop dev g2a \ 133 nexthop dev g2b 134 135 tc qdisc add dev $ul2 clsact 136 tc filter add dev $ul2 ingress pref 111 prot 802.1Q \ 137 flower vlan_id 111 action pass 138 tc filter add dev $ul2 ingress pref 222 prot 802.1Q \ 139 flower vlan_id 222 action pass 140} 141 142sw2_destroy() 143{ 144 tc qdisc del dev $ul2 clsact 145 146 ip route del vrf v$ol2 192.0.2.0/28 147 148 ip route del vrf v$ol2 192.0.2.81/32 via 192.0.2.145 149 __simple_if_fini g2b 192.0.2.82/32 150 tunnel_destroy g2b 151 152 ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129 153 __simple_if_fini g2a 192.0.2.66/32 154 tunnel_destroy g2a 155 156 vlan_destroy $ul2 222 157 vlan_destroy $ul2 111 158 __simple_if_fini $ul2 159 simple_if_fini $ol2 192.0.2.17/28 160} 161 162h2_create() 163{ 164 simple_if_init $h2 192.0.2.18/28 165 ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17 166} 167 168h2_destroy() 169{ 170 ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17 171 simple_if_fini $h2 192.0.2.18/28 172} 173 174setup_prepare() 175{ 176 h1=${NETIFS[p1]} 177 ol1=${NETIFS[p2]} 178 179 ul1=${NETIFS[p3]} 180 ul2=${NETIFS[p4]} 181 182 ol2=${NETIFS[p5]} 183 h2=${NETIFS[p6]} 184 185 vrf_prepare 186 h1_create 187 sw1_create 188 sw2_create 189 h2_create 190 191 forwarding_enable 192} 193 194cleanup() 195{ 196 pre_cleanup 197 198 forwarding_restore 199 200 h2_destroy 201 sw2_destroy 202 sw1_destroy 203 h1_destroy 204 vrf_cleanup 205} 206 207multipath4_test() 208{ 209 local what=$1; shift 210 local weight1=$1; shift 211 local weight2=$1; shift 212 213 sysctl_set net.ipv4.fib_multipath_hash_policy 1 214 ip route replace vrf v$ol1 192.0.2.16/28 \ 215 nexthop dev g1a weight $weight1 \ 216 nexthop dev g1b weight $weight2 217 218 local t0_111=$(tc_rule_stats_get $ul2 111 ingress) 219 local t0_222=$(tc_rule_stats_get $ul2 222 ingress) 220 221 ip vrf exec v$h1 \ 222 $MZ $h1 -q -p 64 -A 192.0.2.1 -B 192.0.2.18 \ 223 -d 1msec -t udp "sp=1024,dp=0-32768" 224 225 local t1_111=$(tc_rule_stats_get $ul2 111 ingress) 226 local t1_222=$(tc_rule_stats_get $ul2 222 ingress) 227 228 local d111=$((t1_111 - t0_111)) 229 local d222=$((t1_222 - t0_222)) 230 multipath_eval "$what" $weight1 $weight2 $d111 $d222 231 232 ip route replace vrf v$ol1 192.0.2.16/28 \ 233 nexthop dev g1a \ 234 nexthop dev g1b 235 sysctl_restore net.ipv4.fib_multipath_hash_policy 236} 237 238ping_ipv4() 239{ 240 ping_test $h1 192.0.2.18 241} 242 243multipath_ipv4() 244{ 245 log_info "Running IPv4 multipath tests" 246 multipath4_test "ECMP" 1 1 247 multipath4_test "Weighted MP 2:1" 2 1 248 multipath4_test "Weighted MP 11:45" 11 45 249} 250 251trap cleanup EXIT 252 253setup_prepare 254setup_wait 255tests_run 256 257exit $EXIT_STATUS