[  367.342863] PPP generic driver version 2.4.2
[  367.343647] NET: Registered PF_PPPOX protocol family
[  367.345763] l2tp_core: L2TP core driver, V2.0
[  367.346842] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  374.706459] iperf3 (9614) used greatest stack depth: 11512 bytes left
[  374.740828] ppp0: recursion detected
[  375.755984] ppp0: recursion detected