[  521.872100] netdevsim netdevsim309 eni309np1: renamed from eth0
[  521.969512] netdevsim netdevsim726 eni726np1: renamed from eth1
[  522.206972] Could not find device with ifindex 2000 in netnsfd 11
[  522.207161] Could not find netns with fd: 2000
[  522.207249] Cannot link a netdevsim to itself
[  522.207351] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).