[  513.480147] netdevsim netdevsim520 eni520np1: renamed from eth1
[  513.578046] netdevsim netdevsim341 eni341np1: renamed from eth0
[  513.776843] Could not find device with ifindex 2000 in netnsfd 11
[  513.776986] Could not find netns with fd: 2000
[  513.777059] Cannot link a netdevsim to itself
[  513.777147] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).