[  520.712972] netdevsim netdevsim299 eni299np1: renamed from eth0
[  520.809696] netdevsim netdevsim520 eni520np1: renamed from eth1
[  521.056422] Could not find device with ifindex 2000 in netnsfd 11
[  521.056678] Could not find netns with fd: 2000
[  521.056787] Cannot link a netdevsim to itself
[  521.056925] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).