[  456.537737] netdevsim netdevsim299 eni299np1: renamed from eth0
[  456.539163] netdevsim netdevsim616 eni616np1: renamed from eth0
[  456.635729] Could not find device with ifindex 2000 in netnsfd 11
[  456.635908] Could not find netns with fd: 2000
[  456.636016] Cannot link a netdevsim to itself
[  456.636135] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).