[  514.971398] netdevsim netdevsim635 eni635np1: renamed from eth1
[  515.069047] netdevsim netdevsim396 eni396np1: renamed from eth0
[  515.303723] Could not find device with ifindex 2000 in netnsfd 11
[  515.304012] Could not find netns with fd: 2000
[  515.304127] Cannot link a netdevsim to itself
[  515.304248] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).