[ 527.041739] netdevsim netdevsim280 eni280np1: renamed from eth0 [ 527.138766] netdevsim netdevsim513 eni513np1: renamed from eth1 [ 527.405995] Could not find device with ifindex 2000 in netnsfd 11 [ 527.406254] Could not find netns with fd: 2000 [ 527.406390] Cannot link a netdevsim to itself [ 527.406548] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).