Fix the IPv4 address of the dummy0 interface and ensure that ip_forward
is enabled in the network space to get a valid response when checking
for routes between the gateway and other hosts.

Signed-off-by: Marcelo Henrique Cerri <marcelo.ce...@canonical.com>
---
 tools/testing/selftests/net/fib_rule_tests.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/fib_rule_tests.sh 
b/tools/testing/selftests/net/fib_rule_tests.sh
index d4cfb6a7a086..552a9784e759 100755
--- a/tools/testing/selftests/net/fib_rule_tests.sh
+++ b/tools/testing/selftests/net/fib_rule_tests.sh
@@ -54,9 +54,11 @@ setup()
 
        $IP link add dummy0 type dummy
        $IP link set dev dummy0 up
-       $IP address add 198.51.100.1/24 dev dummy0
+       $IP address add 192.51.100.1/24 dev dummy0
        $IP -6 address add 2001:db8:1::1/64 dev dummy0
 
+       ip netns exec testns sysctl -w net.ipv4.ip_forward=1
+
        set +e
 }
 
-- 
2.17.1

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