[  521.378491] netdevsim netdevsim636 eni636np1: renamed from eth1
[  521.475826] netdevsim netdevsim494 eni494np1: renamed from eth0
[  521.720134] Could not find device with ifindex 2000 in netnsfd 11
[  521.720315] Could not find netns with fd: 2000
[  521.720393] Cannot link a netdevsim to itself
[  521.720485] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).