[  524.698891] netdevsim netdevsim537 eni537np1: renamed from eth1
[  524.795291] netdevsim netdevsim508 eni508np1: renamed from eth0
[  525.048134] Could not find device with ifindex 2000 in netnsfd 11
[  525.048343] Could not find netns with fd: 2000
[  525.048429] Cannot link a netdevsim to itself
[  525.048555] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).