[  473.734836] netdevsim netdevsim281 eni281np1: renamed from eth0
[  473.735320] netdevsim netdevsim684 eni684np1: renamed from eth1
[  473.815184] Could not find device with ifindex 2000 in netnsfd 11
[  473.815252] Could not find netns with fd: 2000
[  473.815294] Cannot link a netdevsim to itself
[  473.815342] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).