[  517.459218] netdevsim netdevsim504 eni504np1: renamed from eth0
[  517.556591] netdevsim netdevsim649 eni649np1: renamed from eth1
[  517.789886] Could not find device with ifindex 2000 in netnsfd 11
[  517.790057] Could not find netns with fd: 2000
[  517.790131] Cannot link a netdevsim to itself
[  517.790223] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).