[ 1038.534533][T12650] netdevsim netdevsim580 eni580np1: renamed from eth1 [ 1038.653432][T12652] netdevsim netdevsim273 eni273np1: renamed from eth0 [ 1040.441893][T12729] Could not find device with ifindex 2000 in netnsfd 11 [ 1040.442923][T12729] Could not find netns with fd: 2000 [ 1040.443693][T12729] Cannot link a netdevsim to itself [ 1040.444481][T12729] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).