[  382.605619] PPP generic driver version 2.4.2
[  382.606248] NET: Registered PF_PPPOX protocol family
[  382.608900] l2tp_core: L2TP core driver, V2.0
[  382.609787] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  386.997507] iperf3 (10549) used greatest stack depth: 11488 bytes left
[  387.035963] ppp0: recursion detected
[  388.052176] ppp0: recursion detected