[  456.545993] netdevsim netdevsim520 eni520np1: renamed from eth1
[  456.546807] netdevsim netdevsim359 eni359np1: renamed from eth0
[  456.639095] Could not find device with ifindex 2000 in netnsfd 11
[  456.639237] Could not find netns with fd: 2000
[  456.639342] Cannot link a netdevsim to itself
[  456.639459] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).