[ 1011.051058][T12577] netdevsim netdevsim698 eni698np1: renamed from eth1 [ 1011.162255][T12627] netdevsim netdevsim504 eni504np1: renamed from eth0 [ 1012.987940][T12622] Could not find device with ifindex 2000 in netnsfd 11 [ 1012.988959][T12622] Could not find netns with fd: 2000 [ 1012.989701][T12622] Cannot link a netdevsim to itself [ 1012.990472][T12622] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).