[ 1293.304747][T11132] netdevsim netdevsim638 eni638np1: renamed from eth1 [ 1293.325034][T11134] netdevsim netdevsim435 eni435np1: renamed from eth0 [ 1296.932711][T11126] Could not find device with ifindex 2000 in netnsfd 11 [ 1296.933496][T11126] Could not find netns with fd: 2000 [ 1296.934142][T11126] Cannot link a netdevsim to itself [ 1296.934876][T11126] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).