[  521.015386] netdevsim netdevsim636 eni636np1: renamed from eth1
[  521.111827] netdevsim netdevsim451 eni451np1: renamed from eth0
[  521.344528] Could not find device with ifindex 2000 in netnsfd 11
[  521.344790] Could not find netns with fd: 2000
[  521.344910] Cannot link a netdevsim to itself
[  521.345023] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).