I understand that there's a hardware switch in the ER5-PoE that sits "behind" the eth2-4 ports, but only through reading the forum an other people's blog posts. That little tidbit could be addressed in future documentation...
Anyway, I've no issue with configuring which ports are "in" the switch or not, but I'm looking for more switch management. Things like spanning tree for connecting the router to two downstream switches that are inter-connected for availability (NOT bandwidth). Can anyone point me in the right direction?