[ 1017.495857][T12727] netdevsim netdevsim363 eni363np1: renamed from eth0 [ 1017.602593][T12678] netdevsim netdevsim661 eni661np1: renamed from eth1 [ 1019.379987][T12722] Could not find device with ifindex 2000 in netnsfd 11 [ 1019.381588][T12722] Could not find netns with fd: 2000 [ 1019.382733][T12722] Cannot link a netdevsim to itself [ 1019.384053][T12722] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).