[  875.912145][T11249] PPP generic driver version 2.4.2
[  875.924478][T11249] NET: Registered PF_PPPOX protocol family
[  875.958594][T11249] l2tp_core: L2TP core driver, V2.0
[  875.972629][T11249] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  881.280413][T11323] iperf3 (11323) used greatest stack depth: 22368 bytes left
[  881.423284][T11327] ppp0: recursion detected
[  881.503190][    C3] ppp0: recursion detected
[  882.495277][T11289] ppp0: recursion detected