[  460.655210] netdevsim netdevsim520 eni520np1: renamed from eth1
[  460.655640] netdevsim netdevsim401 eni401np1: renamed from eth0
[  460.743854] Could not find device with ifindex 2000 in netnsfd 11
[  460.744036] Could not find netns with fd: 2000
[  460.744145] Cannot link a netdevsim to itself
[  460.744264] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).