[  485.777532] netdevsim netdevsim684 eni684np1: renamed from eth1
[  485.778199] netdevsim netdevsim299 eni299np1: renamed from eth0
[  485.872322] Could not find device with ifindex 2000 in netnsfd 11
[  485.872418] Could not find netns with fd: 2000
[  485.872464] Cannot link a netdevsim to itself
[  485.872514] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).