[  870.664916][T11243] PPP generic driver version 2.4.2
[  870.673835][T11243] NET: Registered PF_PPPOX protocol family
[  870.692645][T11243] l2tp_core: L2TP core driver, V2.0
[  870.706611][T11243] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  875.854961][T11318] iperf3 (11318) used greatest stack depth: 22416 bytes left
[  875.974299][T11322] ppp0: recursion detected
[  877.033030][T11283] ppp0: recursion detected