Ok so I have tried bonding every way till Sunday I think and still have issues. My setup is as follows.
I have my mdf in one building and idf in another. I currently can only use P2P over the phone pairs to make a connection. Each line can get me about 50 megs. I want to bond this two P2P lines so I can get 100 megs from my mdf to my idf all internal network. I am using rb750up which maybe the problem not sure.
At the MDF I have the 750 configured with bonding mode=balance-alb slaves ether2,ether3 primary=ether2.
At the IDF my 750 has all the ports just bridged together.
All my traffic will only go out one port and not both.
TLB/ALB bonding works per MAC address, so a connection from host A to host B will always use only link #1 for example. A connection from host A to host C might use link #2. So, only in the case host A has connections to hosts B and C, both links will be used.
What kind of devices are you using to connect your MDF with the IDF? If ALB/TLB bonding does not work, it might be due to these devices messing around with the MAC addresses of the two segments (MDF and IDF).