[  454.537591] netdevsim netdevsim337 eni337np1: renamed from eth0
[  454.538295] netdevsim netdevsim731 eni731np1: renamed from eth0
[  454.621282] Could not find device with ifindex 2000 in netnsfd 11
[  454.621374] Could not find netns with fd: 2000
[  454.621413] Cannot link a netdevsim to itself
[  454.621459] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).