[  521.354456] netdevsim netdevsim520 eni520np1: renamed from eth1
[  521.451630] netdevsim netdevsim387 eni387np1: renamed from eth0
[  521.710600] Could not find device with ifindex 2000 in netnsfd 11
[  521.710847] Could not find netns with fd: 2000
[  521.710956] Cannot link a netdevsim to itself
[  521.711075] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).