[ 484.335224] netdevsim netdevsim288 eni288np1: renamed from eth0 [ 484.437096] netdevsim netdevsim569 eni569np1: renamed from eth1 [ 484.820858] Could not find device with ifindex 2000 in netnsfd 11 [ 484.820984] Could not find netns with fd: 2000 [ 484.821050] Cannot link a netdevsim to itself [ 484.821150] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).