[  485.935979] netdevsim netdevsim257 eni257np1: renamed from eth0
[  486.037174] netdevsim netdevsim637 eni637np1: renamed from eth1
[  486.416574] Could not find device with ifindex 2000 in netnsfd 11
[  486.416735] Could not find netns with fd: 2000
[  486.416816] Cannot link a netdevsim to itself
[  486.416912] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).