[  513.861336] netdevsim netdevsim661 eni661np1: renamed from eth1
[  513.958030] netdevsim netdevsim507 eni507np1: renamed from eth0
[  514.174554] Could not find device with ifindex 2000 in netnsfd 11
[  514.174789] Could not find netns with fd: 2000
[  514.174928] Cannot link a netdevsim to itself
[  514.175073] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).