Bugzilla – Bug 2287
FlowMonitor is confused by IP over IP
Last modified: 2016-02-04 19:08:07 UTC
... and IP over IP is used in LTE module. The end result is that the gathered stats are completely wrong.
Fixed in changeset: 11852:ef08c8e00af2
Forgot to credit Rafael Fernandes Lopes for finding this misbehaviour: https://groups.google.com/forum/#!topic/ns-3-users/9cTrKVxeoEg