diff options
Diffstat (limited to 'test/test_ip4.py')
| -rw-r--r-- | test/test_ip4.py | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/test_ip4.py b/test/test_ip4.py index 79d4a36285c..1a611251eb5 100644 --- a/test/test_ip4.py +++ b/test/test_ip4.py @@ -1287,6 +1287,32 @@ class TestIPInput(VppTestCase): self.assertEqual(icmp.src, self.pg0.remote_ip4) self.assertEqual(icmp.dst, self.pg1.remote_ip4) + # + # MTU exceeded + # + p_mtu = (Ether(src=self.pg0.remote_mac, + dst=self.pg0.local_mac) / + IP(src=self.pg0.remote_ip4, + dst=self.pg1.remote_ip4, + ttl=10) / + UDP(sport=1234, dport=1234) / + Raw('\xa5' * 2000)) + + self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, 1500) + + rx = self.send_and_expect(self.pg0, p_mtu * 65, self.pg0) + rx = rx[0] + icmp = rx[ICMP] + + self.assertEqual(icmptypes[icmp.type], "dest-unreach") + self.assertEqual(icmpcodes[icmp.type][icmp.code], + "fragmentation-needed") + self.assertEqual(icmp.src, self.pg0.remote_ip4) + self.assertEqual(icmp.dst, self.pg1.remote_ip4) + + self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, 2500) + rx = self.send_and_expect(self.pg0, p_mtu * 65, self.pg1) + if __name__ == '__main__': unittest.main(testRunner=VppTestRunner) |