[  485.443549] netdevsim netdevsim420 eni420np1: renamed from eth0
[  485.445732] netdevsim netdevsim753 eni753np1: renamed from eth1
[  485.528171] Could not find device with ifindex 2000 in netnsfd 11
[  485.528277] Could not find netns with fd: 2000
[  485.528341] Cannot link a netdevsim to itself
[  485.528389] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).