[  493.841287] netdevsim netdevsim457 eni457np1: renamed from eth0
[  493.938530] netdevsim netdevsim547 eni547np1: renamed from eth1
[  494.177701] Could not find device with ifindex 2000 in netnsfd 11
[  494.178043] Could not find netns with fd: 2000
[  494.178134] Cannot link a netdevsim to itself
[  494.178245] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).