[  523.032750] netdevsim netdevsim516 eni516np1: renamed from eth1
[  523.129739] netdevsim netdevsim310 eni310np1: renamed from eth0
[  523.370701] Could not find device with ifindex 2000 in netnsfd 11
[  523.370895] Could not find netns with fd: 2000
[  523.370992] Cannot link a netdevsim to itself
[  523.371111] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).