2 # SPDX-License-Identifier: GPL-2.0
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
10 # +-------------------------+
13 # | 2001:db8:1::2/64 | |
14 # +-------------------|-----+
16 # +-------------------|------------------------+
19 # | 2001:db8:1::1/64 |
23 # | rem=192.0.2.66 --. |
27 # | | 192.0.2.129/28 |
28 # +---------------------|----------------------+
30 # +---------------------|----------------------+
35 # ! ________________|_____ |
38 # | + $ul22.111 (vlan) + $ul22.222 (vlan) |
39 # | | 192.0.2.145/28 | 192.0.2.161/28 |
41 # +--|----------------------|------------------+
43 # +--|----------------------|------------------+
45 # | + $ul32.111 (vlan) + $ul32.222 (vlan) |
46 # | | 192.0.2.146/28 | 192.0.2.162/28 |
48 # | \______________________/ |
52 # | 192.0.2.177/28 | SW3 |
53 # +---------------------|----------------------+
55 # +---------------------|----------------------+
57 # | ^ 192.0.2.178/28 |
60 # | loc=192.0.2.66 | |
61 # | rem=192.0.2.65 --' |
65 # | 2001:db8:2::1/64 | SW4 |
66 # +--------------------|-----------------------+
68 # +--------------------|---------+
71 # | 2001:db8:2::2/64 H2 |
72 # +------------------------------+
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
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
96 simple_if_init $ol1 2001:db8:1::1/64
97 __simple_if_init $ul1 v$ol1 192.0.2.129/28
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$ol1 192.0.2.66/32 via 192.0.2.130
103 ip -6 route add vrf v$ol1 2001:db8:2::/64 dev g1
108 ip -6 route del vrf v$ol1 2001:db8:2::/64
110 ip route del vrf v$ol1 192.0.2.66/32
111 __simple_if_fini g1 192.0.2.65/32
114 __simple_if_fini $ul1 192.0.2.129/28
115 simple_if_fini $ol1 2001:db8:1::1/64
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
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
133 ip route del vrf v$ul21 192.0.2.66/32
134 ip route del vrf v$ul21 192.0.2.65/32
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
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
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
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
163 tc qdisc del dev $ul32 clsact
165 ip route del vrf v$ul31 192.0.2.65/32
166 ip route del vrf v$ul31 192.0.2.66/32
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
176 simple_if_init $ol4 2001:db8:2::1/64
177 __simple_if_init $ul4 v$ol4 192.0.2.178/28
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$ol4 192.0.2.65/32 via 192.0.2.177
183 ip -6 route add vrf v$ol4 2001:db8:1::/64 dev g2
188 ip -6 route del vrf v$ol4 2001:db8:1::/64
190 ip route del vrf v$ol4 192.0.2.65/32
191 __simple_if_fini g2 192.0.2.66/32
194 __simple_if_fini $ul4 192.0.2.178/28
195 simple_if_fini $ol4 2001:db8:2::1/64
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
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
257 local weight1=$1; shift
258 local weight2=$1; shift
260 sysctl_set net.ipv4.fib_multipath_hash_policy 2
261 ip route replace vrf v$ul21 192.0.2.66/32 \
262 nexthop via 192.0.2.146 weight $weight1 \
263 nexthop via 192.0.2.162 weight $weight2
265 local t0_111=$(tc_rule_stats_get $ul32 111 ingress)
266 local t0_222=$(tc_rule_stats_get $ul32 222 ingress)
269 $MZ $h1 -6 -q -p 64 -A "2001:db8:1::2-2001:db8:1::1e" \
270 -B "2001:db8:2::2-2001:db8:2::1e" \
271 -d 1msec -c 50 -t udp "sp=1024,dp=1024"
274 local t1_111=$(tc_rule_stats_get $ul32 111 ingress)
275 local t1_222=$(tc_rule_stats_get $ul32 222 ingress)
277 local d111=$((t1_111 - t0_111))
278 local d222=$((t1_222 - t0_222))
279 multipath_eval "$what" $weight1 $weight2 $d111 $d222
281 ip route replace vrf v$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
289 ping_test $h1 2001:db8:2::2
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