[  509.737339] netdevsim netdevsim639 eni639np1: renamed from eth1
[  509.835389] netdevsim netdevsim258 eni258np1: renamed from eth0
[  510.053324] Could not find device with ifindex 2000 in netnsfd 11
[  510.053505] Could not find netns with fd: 2000
[  510.053593] Cannot link a netdevsim to itself
[  510.053694] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).