[  455.666911] netdevsim netdevsim471 eni471np1: renamed from eth0
[  455.669723] netdevsim netdevsim621 eni621np1: renamed from eth1
[  455.750632] Could not find device with ifindex 2000 in netnsfd 11
[  455.750746] Could not find netns with fd: 2000
[  455.750798] Cannot link a netdevsim to itself
[  455.750858] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).