#!/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
tc qdisc add dev $ul1 clsact
tc filter add dev $ul1 egress pref 111 prot ipv4 \
flower dst_ip 192.0.2.66 action pass
tc filter add dev $ul1 egress pref 222 prot ipv4 \
flower dst_ip 192.0.2.82 action pass
}
sw1_destroy()
{
tc qdisc del dev $ul1 clsact
ip route del vrf v$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$ol2 192.0.2.0/28 \
nexthop dev g2a \
nexthop dev g2b
}
sw2_destroy()
{
ip route del vrf v$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
}
cleanup()
{
pre_cleanup
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 $ul1 111 egress)
local t0_222=$(tc_rule_stats_get $ul1 222 egress)
ip vrf exec v$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 $ul1 111 egress)
local t1_222=$(tc_rule_stats_get $ul1 222 egress)
local d111=$((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