[  523.943877] netdevsim netdevsim639 eni639np1: renamed from eth1
[  524.039351] netdevsim netdevsim468 eni468np1: renamed from eth0
[  524.300534] Could not find device with ifindex 2000 in netnsfd 11
[  524.300820] Could not find netns with fd: 2000
[  524.300963] Cannot link a netdevsim to itself
[  524.301108] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).