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selftests: forwarding: mirror_gre_bridge_1q_lag: Flush neighbors 

After one LAG slave is downed and another upped, it takes a while for
the neighbor on a bridge to time out and get renegotiated. The test does
prompt update of FDB entries by arpinging. But because the neighbor
still references another address, offloading is not possible, and some
packets may end up not being mirrored.

To force the neighbor renegotiation, simply flush the neighbor table at
the bridge.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2019-01-31 22:35:22 +00:00 committed by David S. Miller
parent ccdb66dd2f
commit a99dd629e8
1 changed files with 1 additions and 0 deletions
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tools/testing/selftests/net/forwarding/mirror_gre_bridge_1q_lag.sh
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@ -225,6 +225,7 @@ test_lag_slave()
# Test connectivity through $up_dev when $down_dev is set down.
ip link set dev $down_dev down
ip neigh flush dev br1
setup_wait_dev $up_dev
setup_wait_dev $host_dev
$ARPING -I br1 192.0.2.130 -qfc 1