[    8.951976][  T178] PPP generic driver version 2.4.2
[    8.957605][  T178] NET: Registered PF_PPPOX protocol family
[    8.983953][  T178] l2tp_core: L2TP core driver, V2.0
[    8.992149][  T178] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[   14.094561][  T255] iperf3 (255) used greatest stack depth: 23400 bytes left
[   14.195857][    C2] ppp0: recursion detected
[   14.226493][  T259] ppp0: recursion detected
[   15.289165][  T221] ppp0: recursion detected