[  899.757749][T11356] PPP generic driver version 2.4.2
[  899.764165][T11356] NET: Registered PF_PPPOX protocol family
[  899.782111][T11356] l2tp_core: L2TP core driver, V2.0
[  899.794896][T11356] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  904.814270][T11431] iperf3 (11431) used greatest stack depth: 22720 bytes left
[  904.929715][T11436] ppp0: recursion detected
[  905.993600][T11396] ppp0: recursion detected
[  906.157172][T11396] xl2tpd (11396) used greatest stack depth: 22256 bytes left