# ngctl -f - list There are 3 total nodes: Name: ngctl97069 Type: socket ID: 00000004 Num hooks: 0 Name: em1 Type: ether ID: 00000002 Num hooks: 0 Name: em0 Type: ether ID: 00000001 Num hooks: 0 # ngctl -f - mkpeer fec dummy fec kernel: ng_ether_attach: can't name node fec0 # ngctl -f - list There are 5 total nodes: Name: ngctl98385 Type: socket ID: 00000008 Num hooks: 0 Name: <unnamed> Type: ether ID: 00000007 Num hooks: 0 Name: fec0 Type: fec ID: 00000006 Num hooks: 0 Name: em1 Type: ether ID: 00000002 Num hooks: 0 Name: em0 Type: ether ID: 00000001 Num hooks: 0 adding em0 && em1 and bringing fec0 up (ifconfig fec0 inet 1.2.3.4 netmask 0xffffff00) causes panic (without crash dump) Kernel config && dmesg available at http://aquatique.rusunix.org/ng_fec/ ng_fec(4) worked fine under 5.4-RELEASE and was the only Layer3 (link|port) (aggregation|trunk|failover) -- http://aquatique.rusunix.org