This remark refers to other routers as well but in particular the 951Ui has this setting which is very ackward imho.
The default setting is ether1 = gateway port and ether2-master and 3-5 are slaves in the switch.
But the PoE-out port is ether5! Why!
What is the idea behind this? What is the expectation the PoE-ether5 port is going to be used for? A camera? Ok, but how many people buy a rb951Ui to hook up a camera or other device to powerfeed it from the wifi router? Not so much I'll guess.
Because ether1 is PoE-in? Well, true but most probably this router will be connected to the adapter directly by means of the powerplug.
Why not swap the default setting of the ether1 and ether5 usage. Many WISP working with MT product might want to use this rb951 to also power the antenna that makes the connection to the provider's AP network. (Like the documentation states. "Less use of power-adapters thus cables.")
Usually the antenna is the gateway and that has to be connected in this default setup to ether1.
But we actually want to use a PoE-out port. So we have to connect the antenna to ether5. But this is just a slave port in the LAN network. If not aware, problems all over....
To make use of the ether5 as gateway port we now have to remove default configuration and make new one where Ether5 becomes the gateway port and is removed from the switch and the ether1 port will become the master switch port and the ports 2-4 will become the new slaves with master=ether1.
If this is done during the first config where the default setup is choosen and an external dhcp network is used (like most operators will have) this creates the need of several reboots etc. Very inconveniant!
Why is the neigbour discovery switched off on the gateway interface. I can understand that for the 'dummy' user this might be the best idea. But imho for ordinary customer this is not the router of choiche anyway. So this router will probably be used mostly in situations where the operator is MT based or where the first setup is done by an operator that already has a network with dhcp-server alive. Default connection will be to the gateway port, but in the other PC the router doesn't come up because discovery is disabled!
If this router is aimed at bulk sales to the 'dummy' customer than the price makes no sense compared to other cheaper and easier to be used devices on the market.
Please give me your ideas and discuss this with MT on this forum.