[  520.894254] netdevsim netdevsim263 eni263np1: renamed from eth0
[  520.991348] netdevsim netdevsim671 eni671np1: renamed from eth1
[  521.251396] Could not find device with ifindex 2000 in netnsfd 11
[  521.251617] Could not find netns with fd: 2000
[  521.251722] Cannot link a netdevsim to itself
[  521.251836] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).