[  500.737255] netdevsim netdevsim257 eni257np1: renamed from eth0
[  500.833244] netdevsim netdevsim654 eni654np1: renamed from eth1
[  501.068197] Could not find device with ifindex 2000 in netnsfd 11
[  501.068586] Could not find netns with fd: 2000
[  501.068695] Cannot link a netdevsim to itself
[  501.068831] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).