[  863.234969][T11246] PPP generic driver version 2.4.2
[  863.247959][T11246] NET: Registered PF_PPPOX protocol family
[  863.266578][T11246] l2tp_core: L2TP core driver, V2.0
[  863.279176][T11246] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  868.414730][T11327] iperf3 (11327) used greatest stack depth: 22656 bytes left
[  868.529530][T11331] ppp0: recursion detected
[  868.716573][    C0] ppp0: recursion detected
[  869.589951][T11283] ppp0: recursion detected