[  381.984505] PPP generic driver version 2.4.2
[  381.985257] NET: Registered PF_PPPOX protocol family
[  381.988148] l2tp_core: L2TP core driver, V2.0
[  381.989515] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  386.373057] iperf3 (10543) used greatest stack depth: 11480 bytes left
[  386.407324] ppp0: recursion detected
[  387.419546] ppp0: recursion detected