[  474.378686] netdevsim netdevsim257 eni257np1: renamed from eth0
[  474.379833] netdevsim netdevsim608 eni608np1: renamed from eth1
[  474.479803] Could not find device with ifindex 2000 in netnsfd 11
[  474.479968] Could not find netns with fd: 2000
[  474.480095] Cannot link a netdevsim to itself
[  474.480229] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).