stats_after = bfd_grab_stats_snapshot(self)
diff = bfd_stats_diff(stats_before, stats_after)
self.assertEqual(0, diff.rx, "RX counter bumped but no BFD packets sent")
stats_after = bfd_grab_stats_snapshot(self)
diff = bfd_stats_diff(stats_before, stats_after)
self.assertEqual(0, diff.rx, "RX counter bumped but no BFD packets sent")