[  523.029857] netdevsim netdevsim508 eni508np1: renamed from eth0
[  523.126690] netdevsim netdevsim720 eni720np1: renamed from eth1
[  523.371942] Could not find device with ifindex 2000 in netnsfd 11
[  523.372146] Could not find netns with fd: 2000
[  523.372238] Cannot link a netdevsim to itself
[  523.372357] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).