[  523.094668] netdevsim netdevsim523 eni523np1: renamed from eth1
[  523.191341] netdevsim netdevsim347 eni347np1: renamed from eth0
[  523.440941] Could not find device with ifindex 2000 in netnsfd 11
[  523.441091] Could not find netns with fd: 2000
[  523.441163] Cannot link a netdevsim to itself
[  523.441267] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).