[  874.899371][T11234] PPP generic driver version 2.4.2
[  874.906761][T11234] NET: Registered PF_PPPOX protocol family
[  874.928848][T11234] l2tp_core: L2TP core driver, V2.0
[  874.936938][T11234] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  880.085664][T11308] iperf3 (11308) used greatest stack depth: 22704 bytes left
[  880.203775][T11312] ppp0: recursion detected
[  881.262554][T11272] ppp0: recursion detected