[  508.720695] netdevsim netdevsim756 eni756np1: renamed from eth1
[  508.818527] netdevsim netdevsim274 eni274np1: renamed from eth0
[  509.020859] Could not find device with ifindex 2000 in netnsfd 11
[  509.021058] Could not find netns with fd: 2000
[  509.021149] Cannot link a netdevsim to itself
[  509.021245] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).