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Wireshark don't see traffic on UE's control plane in LTE (using srsLTE-emane)

Hi! I'm using srsLTE-emane (https://github.com/adjacentlink/srsLTE-emane), an open source software to emulate LTE network, and running Demonstration 1 that you can find here: https://github.com/adjacentlink/emane-model-lte

The software creates some LXC containers: one for UE, one for eNB and one for EPC. I have a network 10.88.1.0/24 used for control plane. Each container is linked to this network through a bridge: 10.88.1.100 is the bridge (letce0), 10.88.1.1 is the EPC (backchan0), 10.88.1.21 is the eNB (backchan0), 10.88.1.2 is the UE (backchan0).

With Wireshark I see traffic of control plane on backchan0 of eNB (10.88.1.21), arriving from backchan0 of UE, but I don't see traffic of control plane on backchan0 of UE (10.88.1.2). I'm not able to understand why. Here are the captured files: https://1drv.ms/f/s!AoGMfEcbAULFlKdwlRhC-v3BdUgdvQ.

Anyone could help me?

Thank you!!

Andrea