[  851.663428][T10259] PPP generic driver version 2.4.2
[  851.670538][T10259] NET: Registered PF_PPPOX protocol family
[  851.693682][T10259] l2tp_core: L2TP core driver, V2.0
[  851.701360][T10259] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  859.701037][T10426] iperf3 (10426) used greatest stack depth: 22656 bytes left
[  859.825785][T10430] ppp0: recursion detected
[  860.884078][T10299] ppp0: recursion detected