[  473.667882] netdevsim netdevsim400 eni400np1: renamed from eth0
[  473.669001] netdevsim netdevsim671 eni671np1: renamed from eth0
[  473.749928] Could not find device with ifindex 2000 in netnsfd 11
[  473.750023] Could not find netns with fd: 2000
[  473.750079] Cannot link a netdevsim to itself
[  473.750140] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).