[  487.690338] netdevsim netdevsim497 eni497np1: renamed from eth0
[  487.788008] netdevsim netdevsim520 eni520np1: renamed from eth1
[  488.037872] Could not find device with ifindex 2000 in netnsfd 11
[  488.038034] Could not find netns with fd: 2000
[  488.038114] Cannot link a netdevsim to itself
[  488.038211] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).