[ 1241.064626][T11144] netdevsim netdevsim345 eni345np1: renamed from eth0 [ 1241.074770][T11142] netdevsim netdevsim691 eni691np1: renamed from eth1 [ 1244.558758][T11136] Could not find device with ifindex 2000 in netnsfd 11 [ 1244.559623][T11136] Could not find netns with fd: 2000 [ 1244.560338][T11136] Cannot link a netdevsim to itself [ 1244.561222][T11136] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).