[ 485.240805] netdevsim netdevsim469 eni469np1: renamed from eth0 [ 485.243116] netdevsim netdevsim752 eni752np1: renamed from eth1 [ 485.584431] Could not find device with ifindex 2000 in netnsfd 11 [ 485.584576] Could not find netns with fd: 2000 [ 485.584669] Cannot link a netdevsim to itself [ 485.584767] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).