I have the same application here
. Two sides to be bridged together (layer2), they are on a FLAT network and a DHCP server is on one side, giving new IP addresses both on local and remote site. An old wireless link between the two sites should be joined with a new one or more (usually of the same speed, but can be faster or slower).
In order to have redundancy, you can simply use STP protocol (spanning tree) and simple layer2 switches, but this will use only one (the "main") of the links until the main link fails. What we need here is both links running together PLUS
redundancy. Using one link for uploading only and the other for downloading only cannot be the way, unless you change the configuration "on the fly" as soon as the main link fails. So it seems that OSPF (a layer3 protocol) is the way, but basically we need bridging. Maybe the example here is the best ? http://wiki.mikrotik.com/wiki/Bonding_Examples
(monitoring must be activated). Is there any additional script to write to let the whole system work ?