netdev - vxlan_asymmetric.sh test failed every time

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Date:   Tue, 13 Oct 2020 12:39:43 +0800
From:   Hangbin Liu <liuhangbin@...il.com>
To:     Ido Schimmel <idosch@...lanox.com>
Cc:     Network Development <netdev@...r.kernel.org>,
        David Ahern <dsahern@...il.com>
Subject: vxlan_asymmetric.sh test failed every time

Hi Ido,

When run vxlan_asymmetric.sh on RHEL8, It failed every time. I though that
it may failed because the kernel version is too old. But today I tried with
latest kernel, it still failed. Would you please help check if I missed
any configuration?

# uname -r
5.9.0
# ip -V
ip utility, iproute2-ss200602
# netsniff-ng -v
netsniff-ng 0.6.6 (Syro), Git id: (none)
# cp forwarding.config.sample forwarding.config

# ./vxlan_asymmetric.sh
RTNETLINK answers: File exists
TEST: ping: local->local vid 10->vid 20                             [FAIL]
TEST: ping: local->remote vid 10->vid 10                            [ OK ]
TEST: ping: local->remote vid 20->vid 20                            [ OK ]
TEST: ping: local->remote vid 10->vid 20                            [FAIL]
TEST: ping: local->remote vid 20->vid 10                            [FAIL]
INFO: deleting neighbours from vlan interfaces
TEST: ping: local->local vid 10->vid 20                             [FAIL]
TEST: ping: local->remote vid 10->vid 10                            [ OK ]
TEST: ping: local->remote vid 20->vid 20                            [ OK ]
TEST: ping: local->remote vid 10->vid 20                            [FAIL]
TEST: ping: local->remote vid 20->vid 10                            [FAIL]
TEST: neigh_suppress: on / neigh exists: yes                        [ OK ]
TEST: neigh_suppress: on / neigh exists: no                         [ OK ]
TEST: neigh_suppress: off / neigh exists: no                        [ OK ]
TEST: neigh_suppress: off / neigh exists: yes                       [ OK ]

# dmesg
[...snip...]
[ 1518.885526] device br1 entered promiscuous mode
[ 1518.886211] device br1 left promiscuous mode
[ 1518.890637] device br1 entered promiscuous mode
[ 1518.941524] br1: received packet on vx10 with own address as source address (addr:00:00:5e:00:01:01, vlan:10)
[ 1518.949522] br1: received packet on vx10 with own address as source address (addr:00:00:5e:00:01:01, vlan:10)
[ 1519.165569] br1: received packet on vx10 with own address as source address (addr:00:00:5e:00:01:01, vlan:10)
[ 1519.166900] IPv6: vlan10-v: IPv6 duplicate address fe80::200:5eff:fe00:101 used by 00:00:5e:00:01:01 detected!
[ 1519.392633] br1: received packet on vx20 with own address as source address (addr:00:00:5e:00:01:01, vlan:20)
[ 1519.741559] br1: received packet on vx20 with own address as source address (addr:00:00:5e:00:01:01, vlan:20)
[ 1519.861641] br1: received packet on vx20 with own address as source address (addr:00:00:5e:00:01:01, vlan:20)
[ 1519.862993] IPv6: vlan20-v: IPv6 duplicate address fe80::200:5eff:fe00:101 used by 00:00:5e:00:01:01 detected!
[ 1520.181565] br1: received packet on vx10 with own address as source address (addr:00:00:5e:00:01:01, vlan:10)
[ 1520.182739] br1: received packet on vx10 with own address as source address (addr:00:00:5e:00:01:01, vlan:10)
[ 1524.853572] net_ratelimit: 4 callbacks suppressed
[ 1524.854346] br1: received packet on vx10 with own address as source address (addr:00:00:5e:00:01:01, vlan:10)
[ 1525.365565] br1: received packet on vx20 with own address as source address (addr:00:00:5e:00:01:01, vlan:20)
[ 1533.557792] br1: received packet on vx10 with own address as source address (addr:00:00:5e:00:01:01, vlan:10)
[ 1534.069921] br1: received packet on vx20 with own address as source address (addr:00:00:5e:00:01:01, vlan:20)
[ 1550.965225] br1: received packet on vx20 with own address as source address (addr:00:00:5e:00:01:01, vlan:20)
[ 1551.477294] br1: received packet on vx10 with own address as source address (addr:00:00:5e:00:01:01, vlan:10)
[ 1558.064257] device w3 left promiscuous mode
[ 1558.073279] br1: port 4(w3) entered disabled state
[...snip...]

Thanks
Hangbin