[  483.017842] netdevsim netdevsim335 eni335np1: renamed from eth0
[  483.018346] netdevsim netdevsim721 eni721np1: renamed from eth1
[  483.102095] Could not find device with ifindex 2000 in netnsfd 11
[  483.102177] Could not find netns with fd: 2000
[  483.102221] Cannot link a netdevsim to itself
[  483.102278] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).