selftests: Disable dad for ipv6 in fcnal-test.sh

Constrained test environment; duplicate address detection is not needed
and causes races so disable it.

Signed-off-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250910025828.38900-1-dsahern@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/net/fcnal-test.sh b/tools/testing/selftests/net/fcnal-test.sh
index 0883da7..8df67ec 100755 (executable)
--- a/tools/testing/selftests/net/fcnal-test.sh
+++ b/tools/testing/selftests/net/fcnal-test.sh
@@ -424,6 +424,8 @@ create_ns()
        ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.keep_addr_on_down=1
        ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.forwarding=1
        ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.forwarding=1
+       ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.accept_dad=0
+       ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.accept_dad=0
 }
 
 # create veth pair to connect namespaces and apply addresses.