[ 1217.775854][T11132] netdevsim netdevsim499 eni499np1: renamed from eth0 [ 1217.798958][T11131] netdevsim netdevsim615 eni615np1: renamed from eth1 [ 1221.209536][T11124] Could not find device with ifindex 2000 in netnsfd 11 [ 1221.210322][T11124] Could not find netns with fd: 2000 [ 1221.210907][T11124] Cannot link a netdevsim to itself [ 1221.211581][T11124] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).