[  522.810141] netdevsim netdevsim520 eni520np1: renamed from eth1
[  522.907444] netdevsim netdevsim331 eni331np1: renamed from eth0
[  523.131437] Could not find device with ifindex 2000 in netnsfd 11
[  523.131674] Could not find netns with fd: 2000
[  523.131792] Cannot link a netdevsim to itself
[  523.131935] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).