[ 1004.864181][T12135] netdevsim netdevsim451 eni451np1: renamed from eth0 [ 1004.949534][T12129] netdevsim netdevsim529 eni529np1: renamed from eth1 [ 1006.791858][T12459] Could not find device with ifindex 2000 in netnsfd 11 [ 1006.793000][T12459] Could not find netns with fd: 2000 [ 1006.799824][T12459] Cannot link a netdevsim to itself [ 1006.800779][T12459] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).