[  884.660782][T11257] PPP generic driver version 2.4.2
[  884.672849][T11257] NET: Registered PF_PPPOX protocol family
[  884.695277][T11257] l2tp_core: L2TP core driver, V2.0
[  884.702280][T11257] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  889.764382][T11332] iperf3 (11332) used greatest stack depth: 22720 bytes left
[  889.881667][T11336] ppp0: recursion detected
[  890.941797][T11296] ppp0: recursion detected