[ 482.246647] netdevsim netdevsim424 eni424np1: renamed from eth0 [ 482.353593] netdevsim netdevsim685 eni685np1: renamed from eth1 [ 483.368283] Could not find device with ifindex 2000 in netnsfd 11 [ 483.369627] Could not find netns with fd: 2000 [ 483.372089] Cannot link a netdevsim to itself [ 483.378856] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).