[  523.881394] netdevsim netdevsim668 eni668np1: renamed from eth1
[  523.978251] netdevsim netdevsim401 eni401np1: renamed from eth0
[  524.254419] Could not find device with ifindex 2000 in netnsfd 11
[  524.254633] Could not find netns with fd: 2000
[  524.254746] Cannot link a netdevsim to itself
[  524.254864] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).