[  522.938693] netdevsim netdevsim642 eni642np1: renamed from eth1
[  523.037089] netdevsim netdevsim315 eni315np1: renamed from eth0
[  523.298918] Could not find device with ifindex 2000 in netnsfd 11
[  523.299171] Could not find netns with fd: 2000
[  523.299310] Cannot link a netdevsim to itself
[  523.299428] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).