[  924.961394][T13072] PPP generic driver version 2.4.2
[  924.968290][T13072] NET: Registered PF_PPPOX protocol family
[  924.992331][T13072] l2tp_core: L2TP core driver, V2.0
[  924.998423][T13072] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  930.704854][T13144] iperf3 (13144) used greatest stack depth: 22464 bytes left
[  930.839982][T13148] ppp0: recursion detected
[  931.915096][T13105] ppp0: recursion detected