[ 491.237039] netdevsim netdevsim317 eni317np1: renamed from eth0 [ 491.338464] netdevsim netdevsim646 eni646np1: renamed from eth1 [ 491.713862] Could not find device with ifindex 2000 in netnsfd 11 [ 491.714006] Could not find netns with fd: 2000 [ 491.714089] Cannot link a netdevsim to itself [ 491.714195] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).