[  814.461635][T10311] PPP generic driver version 2.4.2
[  814.468917][T10311] NET: Registered PF_PPPOX protocol family
[  814.496018][T10311] l2tp_core: L2TP core driver, V2.0
[  814.509189][T10311] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  819.520790][T10386] iperf3 (10386) used greatest stack depth: 22768 bytes left
[  819.636308][T10390] ppp0: recursion detected
[  820.702983][T10351] ppp0: recursion detected