The moment I deleted the bridge, I was kicked off again and could not log back in - even by MAC.
I think that this and your comments below and in the other thread betray the fact that you don't understand what a bridge is.
A bridge is simply a software-based switch of etherlike interfaces. When ports are members of a bridge, you no longer address the ports individually, but the bridge that they are members of. SO, when you add IP addresses that you want to be used on the bridge, you would have to bind the address
to the bridge interface, not the individual ethernet ports. Same goes for DHCP servers, firewall rules, etc.
All members of a bridge act as a single logical interface, and they share a single MAC address amongst each other as well as a common L2 broadcast domain. The bridge interface code will generally pick one MAC address automatically from among all member interfaces and use it to represent the bridge (I can't remember if it automatically picks the highest-numbered MAC or the lowest, but it's one of those two), though the MAC address on the bridge can be overridden and specified manually if desired.
So, when you are talking to the router over MAC Winbox, and you are talking to it through an ethernet port that is a member of a bridge, if you make a change to that bridge or that port (you delete the bridge, you remove the port as a member of the bridge, etc.), of course you are going to get kicked out of your Winbox session...you just severed the communications channel you were using.
However, you *should* be able to reconnect back up again. Did you re-scan the list of devices in Winbox to see if after deleting the bridge the router is being seen with a *different* MAC address than what you used to connect to it before?
There are a couple of reasons why I can think of that would prevent you from doing so:
1) You are trying to MAC Winbox in through the ethernet port that was set up to be the WAN port by the default config. The WAN port has a bunch of default firewall rules on it to protect it from being accessed from the internet at large. Those rules also break MAC Winbox from working on that particular port.
2) MAC Winbox actually does use IP communication behind-the-scenes, sending and receiving broadcast IP packets. So it does require an IP address to be configured on your computer's ethernet port, although it doesn't care a whit *what* that address is. If your computer got an IP automatically via DHCP from the MikroTik, remember that the default DHCP server is configured to run on the bridge interface that you just deleted, so you broke the DHCP server, which means you can't get an address from the router any longer. Also, the default DHCP server config specifies a really short lease time (10 minutes), so very shortly after you deleted the bridge, your computer's DHCP lease expired and it no longer had an IP address. If you wait a couple of minutes, most PC operating systems will self-assign a link-local (169.254.x.x) IP to themselves after DHCP timeout, but until that happens (or you set a static IP on your computer and turn DHCP off), connecting to the router via MAC Winbox will be impossible.
Likely you just didn't want long enough for the computer to pick a 169.254.x.x address to give itself after it lost contact with the MikroTik DHCP server.
I am very confused on how to get multiple devices connected to multiple ports without a bridge and each getting their IP addresses dynamically. I *think* I understand that each interface will need its own DHCP server, but can't they all draw from the same pool and use the same Network entry? I don't want different subnets.
You keep saying you don't want a bridge, but trust me: you want a bridge. I'm not sure where you are getting the idea that you don't. (You also definitely don't want multiple DHCP servers.) You can't have multiple devices plugged into multiple ports share a common subnet without also having them all participate on the same broadcast domain (well, you *can*, but you don't want to without VERY good reasons). What *specifically* are you trying to accomplish that the default config does not already do for you?
Again, a bridge is just a switch running in software. There are two hardware switch chips on the 2011, each handling 5 ports. If you want 2 subnets, one for each switch-group, then you can dismantle the bridge. At that point, the only way for devices plugged into switch 1 to talk to devices plugged into switch 2 is via IP routing, which
necessarily means separate subnets. But if you want all 10 ports (with the exception of the WAN) to work as a *single* contiguous virtual switch, the two physical switch-groups need to be bridged together.
-- Nathan