[  473.420229] netdevsim netdevsim457 eni457np1: renamed from eth0
[  473.420570] netdevsim netdevsim729 eni729np1: renamed from eth1
[  473.492269] Could not find device with ifindex 2000 in netnsfd 11
[  473.492356] Could not find netns with fd: 2000
[  473.492400] Cannot link a netdevsim to itself
[  473.492459] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).