748d27447d
The various multipath tests use mausezahn to generate different flows and check how they are distributed between the available nexthops. The tool is currently invoked with an hard coded transmission delay of 1 ms. This is unnecessary when the tests are run with veth pairs and needlessly prolongs the tests. Parametrize this delay and default it to 0 us. It can be overridden using the forwarding.config file. On my system, this reduces the run time of router_multipath.sh by 93%. Signed-off-by: Ido Schimmel <idosch@nvidia.com> Link: https://lore.kernel.org/r/20240304095612.462900-3-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
257 lines
6.3 KiB
Bash
Executable file
257 lines
6.3 KiB
Bash
Executable file
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Test traffic distribution when a wECMP route forwards traffic to two GRE
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# tunnels.
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#
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# +-------------------------+
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# | H1 |
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# | $h1 + |
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# | 192.0.2.1/28 | |
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# +-------------------|-----+
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# |
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# +-------------------|------------------------+
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# | SW1 | |
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# | $ol1 + |
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# | 192.0.2.2/28 |
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# | |
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# | + g1a (gre) + g1b (gre) |
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# | loc=192.0.2.65 loc=192.0.2.81 |
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# | rem=192.0.2.66 --. rem=192.0.2.82 --. |
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# | tos=inherit | tos=inherit | |
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# | .------------------' | |
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# | | .------------------' |
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# | v v |
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# | + $ul1.111 (vlan) + $ul1.222 (vlan) |
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# | | 192.0.2.129/28 | 192.0.2.145/28 |
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# | \ / |
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# | \________________/ |
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# | | |
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# | + $ul1 |
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# +------------|-------------------------------+
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# |
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# +------------|-------------------------------+
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# | SW2 + $ul2 |
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# | _______|________ |
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# | / \ |
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# | / \ |
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# | + $ul2.111 (vlan) + $ul2.222 (vlan) |
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# | ^ 192.0.2.130/28 ^ 192.0.2.146/28 |
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# | | | |
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# | | '------------------. |
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# | '------------------. | |
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# | + g2a (gre) | + g2b (gre) | |
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# | loc=192.0.2.66 | loc=192.0.2.82 | |
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# | rem=192.0.2.65 --' rem=192.0.2.81 --' |
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# | tos=inherit tos=inherit |
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# | |
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# | $ol2 + |
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# | 192.0.2.17/28 | |
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# +-------------------|------------------------+
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# |
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# +-------------------|-----+
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# | H2 | |
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# | $h2 + |
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# | 192.0.2.18/28 |
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# +-------------------------+
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ALL_TESTS="
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ping_ipv4
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multipath_ipv4
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"
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NUM_NETIFS=6
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source lib.sh
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h1_create()
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{
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simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64
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ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2
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}
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h1_destroy()
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{
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ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2
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simple_if_fini $h1 192.0.2.1/28
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}
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sw1_create()
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{
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simple_if_init $ol1 192.0.2.2/28
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__simple_if_init $ul1 v$ol1
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vlan_create $ul1 111 v$ol1 192.0.2.129/28
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vlan_create $ul1 222 v$ol1 192.0.2.145/28
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tunnel_create g1a gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1
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__simple_if_init g1a v$ol1 192.0.2.65/32
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ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130
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tunnel_create g1b gre 192.0.2.81 192.0.2.82 tos inherit dev v$ol1
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__simple_if_init g1b v$ol1 192.0.2.81/32
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ip route add vrf v$ol1 192.0.2.82/32 via 192.0.2.146
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ip route add vrf v$ol1 192.0.2.16/28 \
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nexthop dev g1a \
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nexthop dev g1b
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}
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sw1_destroy()
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{
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ip route del vrf v$ol1 192.0.2.16/28
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ip route del vrf v$ol1 192.0.2.82/32 via 192.0.2.146
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__simple_if_fini g1b 192.0.2.81/32
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tunnel_destroy g1b
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ip route del vrf v$ol1 192.0.2.66/32 via 192.0.2.130
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__simple_if_fini g1a 192.0.2.65/32
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tunnel_destroy g1a
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vlan_destroy $ul1 222
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vlan_destroy $ul1 111
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__simple_if_fini $ul1
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simple_if_fini $ol1 192.0.2.2/28
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}
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sw2_create()
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{
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simple_if_init $ol2 192.0.2.17/28
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__simple_if_init $ul2 v$ol2
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vlan_create $ul2 111 v$ol2 192.0.2.130/28
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vlan_create $ul2 222 v$ol2 192.0.2.146/28
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tunnel_create g2a gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol2
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__simple_if_init g2a v$ol2 192.0.2.66/32
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ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129
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tunnel_create g2b gre 192.0.2.82 192.0.2.81 tos inherit dev v$ol2
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__simple_if_init g2b v$ol2 192.0.2.82/32
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ip route add vrf v$ol2 192.0.2.81/32 via 192.0.2.145
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ip route add vrf v$ol2 192.0.2.0/28 \
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nexthop dev g2a \
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nexthop dev g2b
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tc qdisc add dev $ul2 clsact
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tc filter add dev $ul2 ingress pref 111 prot 802.1Q \
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flower vlan_id 111 action pass
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tc filter add dev $ul2 ingress pref 222 prot 802.1Q \
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flower vlan_id 222 action pass
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}
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sw2_destroy()
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{
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tc qdisc del dev $ul2 clsact
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ip route del vrf v$ol2 192.0.2.0/28
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ip route del vrf v$ol2 192.0.2.81/32 via 192.0.2.145
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__simple_if_fini g2b 192.0.2.82/32
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tunnel_destroy g2b
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ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129
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__simple_if_fini g2a 192.0.2.66/32
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tunnel_destroy g2a
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vlan_destroy $ul2 222
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vlan_destroy $ul2 111
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__simple_if_fini $ul2
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simple_if_fini $ol2 192.0.2.17/28
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}
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h2_create()
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{
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simple_if_init $h2 192.0.2.18/28
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ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17
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}
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h2_destroy()
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{
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ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
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simple_if_fini $h2 192.0.2.18/28
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}
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setup_prepare()
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{
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h1=${NETIFS[p1]}
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ol1=${NETIFS[p2]}
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ul1=${NETIFS[p3]}
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ul2=${NETIFS[p4]}
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ol2=${NETIFS[p5]}
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h2=${NETIFS[p6]}
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vrf_prepare
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h1_create
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sw1_create
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sw2_create
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h2_create
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forwarding_enable
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}
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cleanup()
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{
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pre_cleanup
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forwarding_restore
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h2_destroy
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sw2_destroy
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sw1_destroy
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h1_destroy
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vrf_cleanup
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}
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multipath4_test()
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{
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local what=$1; shift
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local weight1=$1; shift
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local weight2=$1; shift
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sysctl_set net.ipv4.fib_multipath_hash_policy 1
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ip route replace vrf v$ol1 192.0.2.16/28 \
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nexthop dev g1a weight $weight1 \
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nexthop dev g1b weight $weight2
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local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
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local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
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ip vrf exec v$h1 \
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$MZ $h1 -q -p 64 -A 192.0.2.1 -B 192.0.2.18 \
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-d $MZ_DELAY -t udp "sp=1024,dp=0-32768"
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local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
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local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
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local d111=$((t1_111 - t0_111))
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local d222=$((t1_222 - t0_222))
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multipath_eval "$what" $weight1 $weight2 $d111 $d222
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ip route replace vrf v$ol1 192.0.2.16/28 \
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nexthop dev g1a \
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nexthop dev g1b
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sysctl_restore net.ipv4.fib_multipath_hash_policy
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}
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ping_ipv4()
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{
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ping_test $h1 192.0.2.18
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}
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multipath_ipv4()
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{
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log_info "Running IPv4 multipath tests"
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multipath4_test "ECMP" 1 1
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multipath4_test "Weighted MP 2:1" 2 1
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multipath4_test "Weighted MP 11:45" 11 45
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}
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trap cleanup EXIT
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setup_prepare
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setup_wait
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tests_run
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exit $EXIT_STATUS
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