[  519.494989] netdevsim netdevsim621 eni621np1: renamed from eth1
[  519.592205] netdevsim netdevsim282 eni282np1: renamed from eth0
[  519.810907] Could not find device with ifindex 2000 in netnsfd 11
[  519.811116] Could not find netns with fd: 2000
[  519.811228] Cannot link a netdevsim to itself
[  519.811367] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).