[  855.946122][T11352] PPP generic driver version 2.4.2
[  855.952120][T11352] NET: Registered PF_PPPOX protocol family
[  855.973907][T11352] l2tp_core: L2TP core driver, V2.0
[  855.991204][T11352] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  861.255563][T11431] iperf3 (11431) used greatest stack depth: 22768 bytes left
[  861.383949][T11435] ppp0: recursion detected
[  862.446032][T11392] ppp0: recursion detected