[  508.914557] netdevsim netdevsim684 eni684np1: renamed from eth1
[  509.011885] netdevsim netdevsim309 eni309np1: renamed from eth0
[  509.250093] Could not find device with ifindex 2000 in netnsfd 11
[  509.250293] Could not find netns with fd: 2000
[  509.250379] Cannot link a netdevsim to itself
[  509.250480] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).