[  512.496311] netdevsim netdevsim639 eni639np1: renamed from eth1
[  512.594166] netdevsim netdevsim342 eni342np1: renamed from eth0
[  512.781688] Could not find device with ifindex 2000 in netnsfd 11
[  512.781866] Could not find netns with fd: 2000
[  512.781950] Cannot link a netdevsim to itself
[  512.782058] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).