[ 520.283824] netdevsim netdevsim355 eni355np1: renamed from eth0 [ 520.381229] netdevsim netdevsim673 eni673np1: renamed from eth1 [ 520.601330] Could not find device with ifindex 2000 in netnsfd 11 [ 520.601524] Could not find netns with fd: 2000 [ 520.601632] Cannot link a netdevsim to itself [ 520.601767] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).