[  489.733846] netdevsim netdevsim520 eni520np1: renamed from eth1
[  489.828699] netdevsim netdevsim401 eni401np1: renamed from eth0
[  490.126264] Could not find device with ifindex 2000 in netnsfd 11
[  490.126648] Could not find netns with fd: 2000
[  490.126748] Cannot link a netdevsim to itself
[  490.126854] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).