If I have 4 nics on 2 MT boxes and put all of them in a bridge interface, then connect the 4 nics from one box to another what will e the result? Can I get, for example, 4 GB link between them?
I mean can I make Equal-Cost-Multipath-Routing without routing
Bridge (STP protocol) only choses one (the best) way to each particular destination MAC address, it does not care about IP addresses and routing. So, without some (unknown for me) tricks you can not get bonding with bridges.
v2.9 will have all the bonding options. They are not in the current beta but should be in the next beta. It will support Cisco and a number of other vendors bonding options.