[  876.287097][T11246] PPP generic driver version 2.4.2
[  876.293571][T11246] NET: Registered PF_PPPOX protocol family
[  876.318383][T11246] l2tp_core: L2TP core driver, V2.0
[  876.331626][T11246] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  881.455898][T11325] iperf3 (11325) used greatest stack depth: 22576 bytes left
[  881.572573][T11329] ppp0: recursion detected
[  882.624817][T11284] ppp0: recursion detected