Hey all,

I've inherited a fairly complex network of Mikrotiks set up in a small residential compound out in the forest. There are two internet connections, a high-speed fibre connection being beamed from the city to an antenna on the edge of the property, and a massively slower DSL connection, both of which come into separate routers which are then connected to a "core" RB3011 router.

There are four subnets and three VLANs, one which contains the DSL link (192.168.52.0/24 - vlan52, another which contains the fibre link (192.168.51.0/24 - vlan51), another for management (192.168.101.0/24 - vlan101), and another for general use, the core router hands out DHCP leases to client devices on this subnet (192.168.11.0/24), which all the devices in the network reside on.

Due to some poor/expedient choices early on, the high-speed link was very unstable, so we set up a mechanism to switch between it and the DSL involving routes between the subnets containing each connection. We could switch between the connections by manipulating the distance to each route. However the fibre link went completely offline for several months, and has only recently been reconnected, now with a ~200m fibre line and independent power at the antenna. I've obviously messed up the configuration of the "core" router because it can't communicate with the edge router that holds the fibre connection, so I'm hoping for help to figure out what I've done wrong.

Our main Mikrotik guy is too busy sorting other more important projects so partly as a learning exercise and partly because I happen to live in one of the residences served by the terrible DSL connection at the moment, I wanted to try and learn and figure it out myself, so I've played with bridges and VLANs, but can't seem to communicate correctly with the router. Help (: thanks!

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