[ 485.568241] netdevsim netdevsim464 eni464np1: renamed from eth0 [ 485.670078] netdevsim netdevsim738 eni738np1: renamed from eth1 [ 486.036184] Could not find device with ifindex 2000 in netnsfd 11 [ 486.036359] Could not find netns with fd: 2000 [ 486.036447] Cannot link a netdevsim to itself [ 486.036542] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).