[  516.977259] netdevsim netdevsim638 eni638np1: renamed from eth1
[  517.074342] netdevsim netdevsim273 eni273np1: renamed from eth0
[  517.270204] Could not find device with ifindex 2000 in netnsfd 11
[  517.270358] Could not find netns with fd: 2000
[  517.270431] Cannot link a netdevsim to itself
[  517.270520] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).