[  473.796525] netdevsim netdevsim504 eni504np1: renamed from eth0
[  473.796897] netdevsim netdevsim664 eni664np1: renamed from eth1
[  473.875525] Could not find device with ifindex 2000 in netnsfd 11
[  473.875671] Could not find netns with fd: 2000
[  473.875773] Cannot link a netdevsim to itself
[  473.875896] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).